USRE44853E1 - Buffer compositions - Google Patents
Buffer compositions Download PDFInfo
- Publication number
- USRE44853E1 USRE44853E1 US13/450,142 US201213450142A USRE44853E US RE44853 E1 USRE44853 E1 US RE44853E1 US 201213450142 A US201213450142 A US 201213450142A US RE44853 E USRE44853 E US RE44853E
- Authority
- US
- United States
- Prior art keywords
- oxide
- polymer
- semiconductive
- fluorinated
- acid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000000203 mixture Substances 0.000 title claims abstract description 53
- 239000000872 buffer Substances 0.000 title claims abstract description 45
- 229920000642 polymer Polymers 0.000 claims abstract description 129
- 239000002253 acid Substances 0.000 claims abstract description 66
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims abstract description 57
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 37
- 239000002245 particle Substances 0.000 claims abstract description 26
- 125000004432 carbon atom Chemical group C* 0.000 claims abstract description 18
- 229910052731 fluorine Inorganic materials 0.000 claims abstract description 13
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 6
- 229910003437 indium oxide Inorganic materials 0.000 claims abstract description 5
- 229910052708 sodium Inorganic materials 0.000 claims abstract description 5
- YVTHLONGBIQYBO-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) Chemical compound [O--].[Zn++].[In+3] YVTHLONGBIQYBO-UHFFFAOYSA-N 0.000 claims abstract description 5
- CZJCMXPZSYNVLP-UHFFFAOYSA-N antimony zinc Chemical compound [Zn].[Sb] CZJCMXPZSYNVLP-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052783 alkali metal Inorganic materials 0.000 claims description 5
- 150000001340 alkali metals Chemical class 0.000 claims description 5
- 229910021481 rutherfordium Inorganic materials 0.000 claims description 5
- 239000000178 monomer Substances 0.000 abstract description 80
- -1 polycyclic heteroaromatics Chemical class 0.000 abstract description 56
- 238000000034 method Methods 0.000 abstract description 37
- 229920001577 copolymer Polymers 0.000 abstract description 35
- 229930192474 thiophene Natural products 0.000 abstract description 10
- 239000004952 Polyamide Substances 0.000 abstract description 2
- 239000004642 Polyimide Substances 0.000 abstract description 2
- 150000001448 anilines Chemical class 0.000 abstract description 2
- 229920003235 aromatic polyamide Polymers 0.000 abstract description 2
- 229910044991 metal oxide Inorganic materials 0.000 abstract description 2
- 150000004706 metal oxides Chemical class 0.000 abstract description 2
- 229920002401 polyacrylamide Polymers 0.000 abstract description 2
- 229920000058 polyacrylate Polymers 0.000 abstract description 2
- 229920002647 polyamide Polymers 0.000 abstract description 2
- 229920001721 polyimide Polymers 0.000 abstract description 2
- 229920000193 polymethacrylate Polymers 0.000 abstract description 2
- 229920000098 polyolefin Polymers 0.000 abstract description 2
- 150000003233 pyrroles Chemical class 0.000 abstract description 2
- 150000003577 thiophenes Chemical class 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 115
- 239000010408 film Substances 0.000 description 78
- 239000006185 dispersion Substances 0.000 description 72
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 63
- 239000000463 material Substances 0.000 description 57
- 229920000557 Nafion® Polymers 0.000 description 46
- 125000000217 alkyl group Chemical group 0.000 description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 40
- 239000000523 sample Substances 0.000 description 36
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 33
- 239000002243 precursor Substances 0.000 description 32
- RZXLPPRPEOUENN-UHFFFAOYSA-N Chlorfenson Chemical compound C1=CC(Cl)=CC=C1OS(=O)(=O)C1=CC=C(Cl)C=C1 RZXLPPRPEOUENN-UHFFFAOYSA-N 0.000 description 30
- 239000001257 hydrogen Substances 0.000 description 29
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 28
- 230000002378 acidificating effect Effects 0.000 description 25
- 229910052787 antimony Inorganic materials 0.000 description 24
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 23
- 239000011701 zinc Substances 0.000 description 23
- 229910052757 nitrogen Inorganic materials 0.000 description 22
- 239000010931 gold Substances 0.000 description 21
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 21
- 239000000758 substrate Substances 0.000 description 21
- 230000000694 effects Effects 0.000 description 20
- 239000011521 glass Substances 0.000 description 20
- 239000007788 liquid Substances 0.000 description 19
- 238000006243 chemical reaction Methods 0.000 description 18
- 239000011347 resin Substances 0.000 description 18
- 229920005989 resin Polymers 0.000 description 18
- 229910052725 zinc Inorganic materials 0.000 description 18
- 125000003118 aryl group Chemical group 0.000 description 17
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 17
- 229910052737 gold Inorganic materials 0.000 description 17
- YTPLMLYBLZKORZ-UHFFFAOYSA-N Thiophene Chemical compound C=1C=CSC=1 YTPLMLYBLZKORZ-UHFFFAOYSA-N 0.000 description 16
- 150000001875 compounds Chemical class 0.000 description 16
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 15
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 15
- 239000003960 organic solvent Substances 0.000 description 15
- 239000007800 oxidant agent Substances 0.000 description 15
- 239000007787 solid Substances 0.000 description 15
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 15
- 150000007942 carboxylates Chemical class 0.000 description 14
- 239000003456 ion exchange resin Substances 0.000 description 14
- 229920003303 ion-exchange polymer Polymers 0.000 description 14
- 238000006116 polymerization reaction Methods 0.000 description 14
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 13
- 125000003342 alkenyl group Chemical group 0.000 description 13
- 125000002947 alkylene group Chemical group 0.000 description 13
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 12
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 12
- 229910000410 antimony oxide Inorganic materials 0.000 description 12
- 229910052736 halogen Inorganic materials 0.000 description 12
- 150000002367 halogens Chemical class 0.000 description 12
- 238000005259 measurement Methods 0.000 description 12
- 229910052751 metal Inorganic materials 0.000 description 12
- 239000002184 metal Substances 0.000 description 12
- 239000004593 Epoxy Substances 0.000 description 11
- 229920001940 conductive polymer Polymers 0.000 description 11
- 238000000151 deposition Methods 0.000 description 11
- 238000004528 spin coating Methods 0.000 description 11
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 10
- 0 [1*]C1=CSC=C1[1*] Chemical compound [1*]C1=CSC=C1[1*] 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 10
- 230000008569 process Effects 0.000 description 10
- 239000000126 substance Substances 0.000 description 10
- 229910052717 sulfur Inorganic materials 0.000 description 10
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 9
- 239000003729 cation exchange resin Substances 0.000 description 9
- 229910000077 silane Inorganic materials 0.000 description 9
- 239000000243 solution Substances 0.000 description 9
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 8
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 description 8
- ABLZXFCXXLZCGV-UHFFFAOYSA-N Phosphorous acid Chemical compound OP(O)=O ABLZXFCXXLZCGV-UHFFFAOYSA-N 0.000 description 8
- 125000003545 alkoxy group Chemical group 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 8
- SJYNFBVQFBRSIB-UHFFFAOYSA-N norbornadiene Chemical compound C1=CC2C=CC1C2 SJYNFBVQFBRSIB-UHFFFAOYSA-N 0.000 description 8
- 238000002360 preparation method Methods 0.000 description 8
- 125000001424 substituent group Chemical group 0.000 description 8
- 238000003786 synthesis reaction Methods 0.000 description 8
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 7
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 7
- 125000002723 alicyclic group Chemical group 0.000 description 7
- 125000004450 alkenylene group Chemical group 0.000 description 7
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 7
- 239000003957 anion exchange resin Substances 0.000 description 7
- 125000003710 aryl alkyl group Chemical group 0.000 description 7
- 125000000732 arylene group Chemical group 0.000 description 7
- 150000001768 cations Chemical group 0.000 description 7
- 239000000706 filtrate Substances 0.000 description 7
- 125000005549 heteroarylene group Chemical group 0.000 description 7
- 239000011593 sulfur Substances 0.000 description 7
- URLKBWYHVLBVBO-UHFFFAOYSA-N Para-Xylene Chemical group CC1=CC=C(C)C=C1 URLKBWYHVLBVBO-UHFFFAOYSA-N 0.000 description 6
- KAESVJOAVNADME-UHFFFAOYSA-N Pyrrole Chemical compound C=1C=CNC=1 KAESVJOAVNADME-UHFFFAOYSA-N 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 6
- 150000007513 acids Chemical class 0.000 description 6
- 125000002877 alkyl aryl group Chemical group 0.000 description 6
- 125000006350 alkyl thio alkyl group Chemical group 0.000 description 6
- 239000007864 aqueous solution Substances 0.000 description 6
- 230000008901 benefit Effects 0.000 description 6
- JHRWWRDRBPCWTF-OLQVQODUSA-N captafol Chemical compound C1C=CC[C@H]2C(=O)N(SC(Cl)(Cl)C(Cl)Cl)C(=O)[C@H]21 JHRWWRDRBPCWTF-OLQVQODUSA-N 0.000 description 6
- 125000001589 carboacyl group Chemical group 0.000 description 6
- 239000002322 conducting polymer Substances 0.000 description 6
- 239000011737 fluorine Substances 0.000 description 6
- 229920001519 homopolymer Polymers 0.000 description 6
- ZAHSNWXGKUBLHM-UHFFFAOYSA-N hydroperoxy(hydroxy)silane Chemical compound OO[SiH2]O ZAHSNWXGKUBLHM-UHFFFAOYSA-N 0.000 description 6
- 238000005342 ion exchange Methods 0.000 description 6
- 150000002500 ions Chemical class 0.000 description 6
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 6
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 description 6
- 238000005240 physical vapour deposition Methods 0.000 description 6
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 6
- 125000000542 sulfonic acid group Chemical group 0.000 description 6
- WVDDGKGOMKODPV-UHFFFAOYSA-N Benzyl alcohol Chemical group OCC1=CC=CC=C1 WVDDGKGOMKODPV-UHFFFAOYSA-N 0.000 description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 5
- 125000004183 alkoxy alkyl group Chemical group 0.000 description 5
- 125000004453 alkoxycarbonyl group Chemical group 0.000 description 5
- 125000003282 alkyl amino group Chemical group 0.000 description 5
- 125000004644 alkyl sulfinyl group Chemical group 0.000 description 5
- 125000004390 alkyl sulfonyl group Chemical group 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 125000005135 aryl sulfinyl group Chemical group 0.000 description 5
- 125000004391 aryl sulfonyl group Chemical group 0.000 description 5
- 125000005110 aryl thio group Chemical group 0.000 description 5
- 125000004104 aryloxy group Chemical group 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 229910052788 barium Inorganic materials 0.000 description 5
- 238000005341 cation exchange Methods 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 239000008367 deionised water Substances 0.000 description 5
- 125000004663 dialkyl amino group Chemical group 0.000 description 5
- 238000005538 encapsulation Methods 0.000 description 5
- 238000001704 evaporation Methods 0.000 description 5
- 230000008020 evaporation Effects 0.000 description 5
- 125000001153 fluoro group Chemical group F* 0.000 description 5
- 125000004404 heteroalkyl group Chemical group 0.000 description 5
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 125000004430 oxygen atom Chemical group O* 0.000 description 5
- 230000005855 radiation Effects 0.000 description 5
- 150000003839 salts Chemical class 0.000 description 5
- 229910052711 selenium Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- OBTWBSRJZRCYQV-UHFFFAOYSA-N sulfuryl difluoride Chemical compound FS(F)(=O)=O OBTWBSRJZRCYQV-UHFFFAOYSA-N 0.000 description 5
- 229910052714 tellurium Inorganic materials 0.000 description 5
- YZUPZGFPHUVJKC-UHFFFAOYSA-N 1-bromo-2-methoxyethane Chemical compound COCCBr YZUPZGFPHUVJKC-UHFFFAOYSA-N 0.000 description 4
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 4
- LTEQMZWBSYACLV-UHFFFAOYSA-N Hexylbenzene Chemical compound CCCCCCC1=CC=CC=C1 LTEQMZWBSYACLV-UHFFFAOYSA-N 0.000 description 4
- 229910006069 SO3H Inorganic materials 0.000 description 4
- OGMBGEBDYBDOEN-UHFFFAOYSA-N [Zn].[Sb]=O Chemical compound [Zn].[Sb]=O OGMBGEBDYBDOEN-UHFFFAOYSA-N 0.000 description 4
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 239000003054 catalyst Substances 0.000 description 4
- 238000005229 chemical vapour deposition Methods 0.000 description 4
- 239000000084 colloidal system Substances 0.000 description 4
- 229910021641 deionized water Inorganic materials 0.000 description 4
- 125000003709 fluoroalkyl group Chemical group 0.000 description 4
- 125000004474 heteroalkylene group Chemical group 0.000 description 4
- 230000000670 limiting effect Effects 0.000 description 4
- 229910003002 lithium salt Inorganic materials 0.000 description 4
- 159000000002 lithium salts Chemical class 0.000 description 4
- 230000014759 maintenance of location Effects 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 229920000767 polyaniline Polymers 0.000 description 4
- 229920000123 polythiophene Polymers 0.000 description 4
- 239000011541 reaction mixture Substances 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- 125000002023 trifluoromethyl group Chemical group FC(F)(F)* 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 3
- 238000004438 BET method Methods 0.000 description 3
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 3
- 239000005977 Ethylene Substances 0.000 description 3
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 3
- 229910006095 SO2F Inorganic materials 0.000 description 3
- QYKIQEUNHZKYBP-UHFFFAOYSA-N Vinyl ether Chemical class C=COC=C QYKIQEUNHZKYBP-UHFFFAOYSA-N 0.000 description 3
- 229910000272 alkali metal oxide Inorganic materials 0.000 description 3
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 3
- 235000011114 ammonium hydroxide Nutrition 0.000 description 3
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 3
- 239000002585 base Substances 0.000 description 3
- 229910052791 calcium Inorganic materials 0.000 description 3
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 3
- 229940023913 cation exchange resins Drugs 0.000 description 3
- 229920000547 conjugated polymer Polymers 0.000 description 3
- 125000004122 cyclic group Chemical group 0.000 description 3
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical group [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 description 3
- 150000002170 ethers Chemical class 0.000 description 3
- 229910000856 hastalloy Inorganic materials 0.000 description 3
- 125000001072 heteroaryl group Chemical group 0.000 description 3
- 230000007062 hydrolysis Effects 0.000 description 3
- 238000006460 hydrolysis reaction Methods 0.000 description 3
- 229920002521 macromolecule Polymers 0.000 description 3
- 229910052749 magnesium Inorganic materials 0.000 description 3
- 239000011777 magnesium Substances 0.000 description 3
- 239000002609 medium Substances 0.000 description 3
- 229910021645 metal ion Inorganic materials 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- 150000007524 organic acids Chemical class 0.000 description 3
- 229920000128 polypyrrole Polymers 0.000 description 3
- 229910052700 potassium Inorganic materials 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 238000010791 quenching Methods 0.000 description 3
- 230000002829 reductive effect Effects 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 239000011734 sodium Substances 0.000 description 3
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 3
- 125000001273 sulfonato group Chemical group [O-]S(*)(=O)=O 0.000 description 3
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 3
- 229910052727 yttrium Inorganic materials 0.000 description 3
- OWOMRZKBDFBMHP-UHFFFAOYSA-N zinc antimony(3+) oxygen(2-) Chemical compound [O--].[Zn++].[Sb+3] OWOMRZKBDFBMHP-UHFFFAOYSA-N 0.000 description 3
- 239000011787 zinc oxide Substances 0.000 description 3
- 229960001296 zinc oxide Drugs 0.000 description 3
- BQCIDUSAKPWEOX-UHFFFAOYSA-N 1,1-Difluoroethene Chemical group FC(F)=C BQCIDUSAKPWEOX-UHFFFAOYSA-N 0.000 description 2
- SUTQSIHGGHVXFK-UHFFFAOYSA-N 1,2,2-trifluoroethenylbenzene Chemical compound FC(F)=C(F)C1=CC=CC=C1 SUTQSIHGGHVXFK-UHFFFAOYSA-N 0.000 description 2
- IYZMXHQDXZKNCY-UHFFFAOYSA-N 1-n,1-n-diphenyl-4-n,4-n-bis[4-(n-phenylanilino)phenyl]benzene-1,4-diamine Chemical compound C1=CC=CC=C1N(C=1C=CC(=CC=1)N(C=1C=CC(=CC=1)N(C=1C=CC=CC=1)C=1C=CC=CC=1)C=1C=CC(=CC=1)N(C=1C=CC=CC=1)C=1C=CC=CC=1)C1=CC=CC=C1 IYZMXHQDXZKNCY-UHFFFAOYSA-N 0.000 description 2
- 238000004293 19F NMR spectroscopy Methods 0.000 description 2
- VQGHOUODWALEFC-UHFFFAOYSA-N 2-phenylpyridine Chemical compound C1=CC=CC=C1C1=CC=CC=N1 VQGHOUODWALEFC-UHFFFAOYSA-N 0.000 description 2
- FSEXLNMNADBYJU-UHFFFAOYSA-N 2-phenylquinoline Chemical compound C1=CC=CC=C1C1=CC=C(C=CC=C2)C2=N1 FSEXLNMNADBYJU-UHFFFAOYSA-N 0.000 description 2
- ZVFQEOPUXVPSLB-UHFFFAOYSA-N 3-(4-tert-butylphenyl)-4-phenyl-5-(4-phenylphenyl)-1,2,4-triazole Chemical compound C1=CC(C(C)(C)C)=CC=C1C(N1C=2C=CC=CC=2)=NN=C1C1=CC=C(C=2C=CC=CC=2)C=C1 ZVFQEOPUXVPSLB-UHFFFAOYSA-N 0.000 description 2
- OGGKVJMNFFSDEV-UHFFFAOYSA-N 3-methyl-n-[4-[4-(n-(3-methylphenyl)anilino)phenyl]phenyl]-n-phenylaniline Chemical compound CC1=CC=CC(N(C=2C=CC=CC=2)C=2C=CC(=CC=2)C=2C=CC(=CC=2)N(C=2C=CC=CC=2)C=2C=C(C)C=CC=2)=C1 OGGKVJMNFFSDEV-UHFFFAOYSA-N 0.000 description 2
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- JWUUGQPKEKNHJX-UHFFFAOYSA-N C1(=CC=CC=C1)C1C=CC2=CC=C3C=CC=NC3=C2N1C1=CC=CC=C1 Chemical compound C1(=CC=CC=C1)C1C=CC2=CC=C3C=CC=NC3=C2N1C1=CC=CC=C1 JWUUGQPKEKNHJX-UHFFFAOYSA-N 0.000 description 2
- SISBNGDLBRANNE-UHFFFAOYSA-N CC(C)C.CCCC(F)(F)C(F)(F)S(=O)(=O)O Chemical compound CC(C)C.CCCC(F)(F)C(F)(F)S(=O)(=O)O SISBNGDLBRANNE-UHFFFAOYSA-N 0.000 description 2
- 229910052684 Cerium Inorganic materials 0.000 description 2
- 229910052693 Europium Inorganic materials 0.000 description 2
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 2
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 2
- 229910052772 Samarium Inorganic materials 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/17—Carrier injection layers
- H10K50/171—Electron injection layers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/549—Organic PV cells
Definitions
- This disclosure relates in general to high work function transparent conductors for use in electronic devices.
- Organic electronic devices define a category of products that include an active layer. Such devices convert electrical energy into radiation, detect signals through electronic processes, convert radiation into electrical energy, or include one or more organic semiconductor layers.
- OLEDs are organic electronic devices comprising an organic layer capable of electroluminescence.
- OLEDs containing conducting polymers can have the following configuration;
- the anode is typically any material that has the ability to inject holes into the electroluminescent (“EL”) material, such as, for example, indium/tin oxide (ITO).
- EL electroluminescent
- ITO indium/tin oxide
- the anode is optionally supported on a glass or plastic substrate.
- the buffer layer is typically an electrically conducting polymer and facilitates the injection of holes from the anode into the EL material layer.
- EL materials include fluorescent compounds, fluorescent and phosphorescent metal complexes, conjugated polymers, and mixtures thereof.
- the cathode is typically any material (such as, e.g., Ca or Ba) that has the ability to inject electrons into the EL material. At least one of the anode or cathode is transparent or semi-transparent to allow for light emission.
- ITO is frequently used as the transparent anode.
- the work function of ITO is relatively low, typically in the range of 4.6 eV. This results in less effective injection of holes into the EL material.
- the work function of ITO can be improved by surface treatment. However, these treatments sometime result in products that are note stable and further result in reduced device lifetime.
- compositions and layers prepared therefrom to improve the properties of the device.
- a buffer composition comprising semiconductive oxide particles and at least one of (a) a fluorinated acid polymer and (b) a semiconductive polymer doped with a fluorinated acid polymer.
- a buffer layer made from the new buffer composition.
- an electronic device comprising the buffer layer.
- FIG. 1 is a diagram illustrating contact angle.
- FIG. 2 is a schematic diagram of an organic electronic device.
- a buffer composition comprising semiconductive oxide particles and at least one of (a) a fluorinated acid polymer and (b) a semiconductive polymer doped with a fluorinated acid polymer.
- the term “semiconductive” refers to material having electrical conductivity greater than insulators but less than good conductors. In one embodiment, a film of a semiconductive material has a conductivity of less than 0.1 S/cm and greater than 10 ⁇ 8 S/cm.
- fluorinated acid polymer refers to a polymer having acidic groups, where at least some of the hydrogens have been replaced by fluorine. Fluorination can occur on the polymer backbone, on side chains attached to the backbone, in pendant groups, or in combinations of these.
- the term “acidic group” refers to a group capable of ionizing to donate a hydrogen ion to a base to form a salt.
- the term “semiconductive polymer” refers to any polymer or oligomer which is inherently or intrinsically capable of electrical conductivity without the addition of carbon black or conductive metal particles.
- the term “polymer” encompasses homopolymers and copolymers.
- the term “doped” is intended to mean that the semiconductive polymer has a polymeric counterion derived from a polymeric acid to balance the charge on the conductive polymer.
- semiconductive oxide materials comprise an oxide of an element selected ken group 2 through group 12 of the periodic table. In one embodiment, semiconductive oxide materials comprise an oxide of an element selected from group 2 and group 12. Group numbers corresponding to columns within the periodic table of the elements use the “New Notation” convention as seen in the CRC Handbook of Chemistry and Physics, 81 st Edition (2000), where the groups are numbered from left to right as 1-18.
- the inorganic semiconductive material is an inorganic oxide which may be a bimetallic oxide, such as Ni x Co x-1 O 3/4 (Science, p 1273-1276, vol 305, Aug. 27, 2004), indium-tin oxide (“ITO”), indium-zinc oxide (“IZO”), gallium-indium oxide, zinc-antimony double oxide and zirconium, or antimony doped oxide.
- ITO indium-tin oxide
- IZO indium-zinc oxide
- gallium-indium oxide zinc-antimony double oxide and zirconium, or antimony doped oxide.
- any semiconductive polymer can be used in the new composition.
- the semiconductive polymer will form a film which has a conductivity of at least 10 ⁇ 2 S/cm.
- the conductive polymers suitable for the new composition can be homopolymers, or they can be copolymers of two or more respective monomers.
- the monomer from which the conductive polymer is formed, is referred to as a “precursor monomer”.
- a copolymer will have more than one precursor monomer.
- the semiconductive polymer is made from at least one precursor monomer selected from thiophenes, pyrroles, anilines, and polycyclic aromatics.
- the polymers made from these monomers are referred to herein as polythiophenes, polypyrroles, polyanilines, and polycyclic aromatic polymers, respectively.
- polycyclic aromatic refers to compounds having more than one aromatic ring. The rings may be joined by one or more bonds, or they may be fused together.
- the term ‘aromatic ring’ is intended to include heteroaromatic rings.
- a “polycyclic heteraromatic” compound has at least one heteroaromatic ring.
- thiophene monomers contemplated for use to form the semiconductive polymer comprise Formula I below:
- alkyl refers to a group derived from an aliphatic hydrocarbon and includes linear, branched and cyclic groups which may be unsubstituted or substituted.
- heteroalkyl is intended to mean an alkyl group, wherein one or more of the carbon atoms within the alkyl group has been replaced by another atom, such as nitrogen, oxygen, sulfur, and the like.
- alkylene refers to an alkyl group haying two points of attachment.
- alkenyl refers to a group derived From an aliphatic hydrocarbon having at least one carbon-carbon double bond, and includes linear, branched and cyclic groups which may be unsubstituted or substituted.
- heteroalkenyl is intended to mean alkenyl group, wherein one or more of the carbon atoms within the alkenyl group has been replaced by another atom, such as nitrogen, oxygen, sulfur, and the like.
- alkenylene refers to an alkenyl group having two points of attachment.
- both R 1 together form —O—(CHY) in —O—, wherein m is 2 or 3, and Y is the same or different at each occurrence and is selected from hydrogen, halogen, alkyl, alcohol, amidosulfonate, benzyl, carboxylate, ether, ether carboxylate, ether sulfonate, ester sulfonate, and urethane, where the Y groups may be partially or fully fluorinated. In one embodiment, all Y are hydrogen.
- the polythiophene is poly(3,4-ethylenedioxythiophene).
- at least one Y group is not hydrogen.
- at least one Y group is a substituent having F substituted for at least one hydrogen.
- at least one Y group is perfluorinated.
- the thiophene monomer has Formula I(a):
- m is two, one R 7 is an Alkyl group of more than 5 carbon atoms, and all other R 7 are Hydrogen.
- at least one R 7 group is fluorinated.
- at least one R 7 group has at least one fluorine substituent.
- the R 7 group is fully fluorinated.
- the R 7 substituents on the fused alicyclic ring on the thiophene offer improved solubility of the monomers in water and facilitate polymerization in the presence of the fluorinated acid polymer.
- m is 2, one R 7 is sulfonic acid-propylene-ether-methylene and all other R 7 are hydrogen. In one embodiment, m is 2, one R 7 is propyl-ether-ethylene and all other R 7 are hydrogen. In one embodiment, m is 2, one R 7 is methoxy and all other R 7 are hydrogen. In one embodiment, one R 7 is sulfonic acid difluoromethylene ester methylene (—CH 2 —O—C(O)—CF 2 —SO 3 H), and all other R 7 are hydrogen.
- pyrrole monomers contemplated for use to form the semiconductive polymer comprise Formula II below.
- R 1 is the same or different at each occurrence and is independently selected from hydrogen, alkyl, alkenyl, alkoxy, cycloalkyl, cycloalkenyl, alcohol, benzyl, carboxylate, ether, amidosulfonate, ether carboxylate, ether sulfonate, ester sulfonate, urethane, epoxy, silane, siloxane, and alkyl substituted with one or more of sulfonic acid, carboxylic acid, acrylic acid, phosphoric acid, phosphonic acid, halogen, nitro, cyano, hydroxyl, epoxy, silane, or siloxane moieties.
- R 2 is selected from hydrogen, alkyl, and alkyl substituted with one or more of sulfonic acid, carboxylic acid, acrylic acid, phosphoric acid, phosphonic acid, halogen, cyano, hydroxyl, epoxy, silane or siloxane moieties.
- the pyrrole monomer is unsubstituted and both R 1 and R 2 are hydrogen.
- both R 1 together form a 6- or 7-membered alicyclic ring, which is further substituted with a group selected from alkyl, heteroalkyl, alcohol, benzyl, carboxylate, ether, ether carboxylate, ether sulfonate, ester sulfonate, and urethane. These groups can improve the solubility of the monomer and the resulting polymer.
- both R 1 together form a 6- or 7-membered alicyclic ring, which is further substituted with an alkyl group.
- both R 1 together form a 6- or 7-membered cyclic ring, which is further substituted with an alkyl group having at least 1 carbon atom.
- both R 1 together form —O—(CHY) M —O—, where m is 2 or 3, and Y is the same or different at each occurrence and is selected from hydrogen, alkyl, alcohol, benzyl, carboxylate, amidosulfonate, ether, ether carboxylate, ether sulfonate, ester sulfonate, and urethane.
- at least one Y group is not hydrogen.
- at least one Y group is a substituent having F substituted for at least one hydrogen.
- at least one Y group is perfluorinated.
- aniline monomers contemplated for use to form the semiconductive polymer comprise Formula III below.
- the aniline monomeric unit can have Formula IV(a) or Formula IV(b) shown below, or a combination of both formulae.
- a is not 0 and at least one R 1 is fluorinated. In one embodiment, at least one R 1 is perfluorinated.
- fused polycyclic heteroaromatic monomers contemplated for use to form the semiconductive polymer have two or more fused aromatic rings, at least one of which is heteroaromatic.
- the fused polycyclic heteroaromatic monomer has Formula V:
- the fused polycyclic heteroaromatic monomer has Formula V(a), V(b), V(c), V(d), V(e), V(f), and V(g):
- the fused polycyclic heteroaromatic Monomer is a thieno(thiophene).
- thieno(thiophene) is selected from thieno(2,3-b)thiophene, thieno(3,2-b)thiophene, and thieno(3,4-b)thiophene.
- the thieno(thiophene) monomer is substituted with at least one group selected from alkyl, heteroalkyl, alcohol, benzyl, carboxylate, ether, ether carboxylate, ether sulfonate, ester sulfonate, and urethane.
- the substituent groups are fluorinated. In one embodiment, the substituent groups are fully fluorinated.
- polycyclic heteroaromatic monomers contemplated for use to form the copolymer in the new composition comprise Formula VI:
- the semiconductive polymer is a copolymer of a first precursor monomer and at least one second precursor monomer. Any type of second monomer can be used, so long as it does not detrimentally affect the desired properties of the copolymer.
- the second monomer comprises no more than 50% of the copolymer, based on the total number of monomer units. In one embodiment, the second monomer comprises no more than 30%, based on the total number of monomer units. In one embodiment, the second monomer comprises no more than 10%, based on the total number of monomer units.
- Exemplary types of second precursor monomers include, but are not limited to, alkenyl, alkynyl, arylene, and heteroarylene.
- Examples of the second monomers include, but are not limited to, fluorene, oxadiazole, thiadiazole, benzothiadiazole, phenylenevinylene, phenyleneethynylene, pyridine, diazines, and triazines, all of which may be further substituted.
- the copolymers are made by first forming an intermediate precursor monomer having the structure A-B-C, where A and C represent first precursor monomers, which can be the same or different, and B represents a second precursor monomer.
- the A-B-C intermediate precursor monomer can be prepared using standard synthetic organic techniques, such as Yamamoto, Stille, Grignard metathesis, Suzuki, and Negishi couplings.
- the copolymer is then formed by conductive polymerization of the intermediate precursor monomer alone, or wish one or more additional precursor monomers.
- the semiconductor polymer is a copolymer of two or more monomers.
- the precursor monomers are selected from thiophene, a pyrrole, an aniline, and a polycyclic aromatic.
- the fluorinated acid polymer (hereinafter referred to as “FAP”) can be any polymer which is fluorinated and has acidic groups.
- fluorinated means that at least one hydrogen bonded to a carbon has been replaced With a fluorine.
- the term includes partially and fully fluorinated materials.
- the fluorinated acid polymer is highly fluorinated.
- highly fluorinated means that at least 50% of the avialable hydrogens bonded to a carbon, have been replaced with fluorine.
- acidic group refers to a group capable of ionizing to donate a hydrogen ion to a Br ⁇ nsted base to form a salt.
- the acidic groups supply an ionizable proton.
- the acidic group has a pKa of less than 3.
- the acidic group has a pKa of less than 0.
- the acidic group has a pKa of less than ⁇ 5.
- the acidic group can be attached directly to the polymer backbone, or it can be attached to side chains on the polymer backbone or pendant groups. Examples of acidic groups include, but are not limited to, carboxylic acid groups, sulfonic acid groups, sulfonimide groups, phosphoric acid groups, phosphonic acid groups, and combinations thereof.
- the acidic groups can all be the same, or the polymer may have more than one type of acidic group.
- the FAP is organic solvent wettable (“wettable FAP”).
- organic solvent wettable refers to a material which, when formed into a film, is wettable by organic solvents. The term also includes polymeric acids which are not film-forming alone, but which when doped into a semiconductive polymer will form a film which is wettable.
- the organic solvent wettable material forms a film which is wettable by phenylhexane with a contact angle less than 40°.
- the FAP is organic solvent non-wettable (“non-wettable FAP”).
- organic solvent non-wettable refers to a material which, when formed into a film, is not wettable by organic solvents.
- the term also includes polymeric acids which are not film-forming alone, but which when doped into a semiconductive polymer will form a film which is non-wettable.
- the organic solvent non-wettable material forms a film on which phenylhexane has a contact angle greater than 40°.
- the term “contact angle” is intended to mean the angle ⁇ shown in FIG. 1 .
- angle ⁇ is defined by the intersection of the plane of the surface and a line from the outer edge of the droplet to the surface.
- angle ⁇ is measured after the droplet has reached an equilibrium position on the surface after being applied, i.e., “static contact angle”.
- the film of the organic solvent wettable fluorinated polymeric acid is represented as the surface.
- the contact angle is no greater than 35°. In one embodiment, the contact angle is no greater than 30°. The methods for measuring contact angles are well known.
- the FAP is water-soluble. In one Embodiment, the FAP is dispersible in water. In one embodiment, the FAP forms a colloidal dispersion in water.
- the polymer backbone is fluorinated.
- suitable polymeric backbones include, but are not limited to, polyolefins, polyacrylates, polymethacrylates, polyimides, polyamides, polyaramids, polyacrylamides, polystyrenes, and copolymers thereof.
- the polymer backbone is highly fluorinated. In one embodiment, the polymer backbone is fully fluorinated.
- the acidic groups are selected from sulfonic acid groups and sulfonimide groups. In one embodiment, the acidic groups are on a fluorinated side chain. In one embodiment, the fluorinated side chains are selected from alkyl groups, alkoxy groups, amido groups, ether groups, and combinations thereof.
- the wettable FAP has a fluorinated olefin backbone, with pendant fluorinated ether sulfonate, fluorinated ester sulfonate, or fluorinated ether sulfonimide groups.
- the polymer is a copolymer of 1,1-difluoroethylene and 2-(1,1-difluoro-2-(trifluoromethyl) allyloxy)-1,1,2,2′-tetrafluoroethanesulfonic acid.
- the polymer is a copolymer of ethylene and 2-(2-(1,2,2-trifluorovinyloxy)-1,1,2,3,3,3-hexafluoropropoxy)-1,1,2,2-tetrafluoroethanesulfonic acid.
- These copolymers can be made as the corresponding sulfonyl fluoride polymer and then can be converted to the sulfonic acid form.
- the wettable FAP is homopolymer or copolymer of a fluorinated and partially sulfonated poly(arylene ether sulfone).
- the copolymer can be a block copolymer.
- comonomers include, but are not limited to butadiene, butylene, isobutylene, styrene, and combinations thereof.
- the wettable FAP is a homopolymer or Copolymer of monomers having Formula VII:
- the monomer is “SFS” or SFSI” shown below:
- the polymer After polymerization, the polymer can be converted to the acid form.
- the wettable FAP is a homopolymer or copolymer of a trifluorostyrene having acidic groups.
- the trifluorostyrene monomer has Formula VIII:
- the wettable FAP is a sulfonimide polymer having Formula IX:
- the wettable FAP comprises a fluorinated polymer backbone including a side chain having Formula
- the wettable FAP has Formula XI:
- the wettable FAP comprises at least one repeat unit derived from an ethylenically unsaturated compound having Formula XII:
- d is 0, 1, or 2;
- R 21 is a group capable of forming or rearranging to a tertiary cation, more typically an alkyl group of 1 to 20 carbon atoms, and most typically t-butyl.
- the reaction may be conducted at temperatures ranging from about 0° C. to about 200° C., more typically from about 30° C. to about 150° C., in the absence or presence of an inert solvent such as diethyl ether.
- an inert solvent such as diethyl ether.
- a closed reactor is typically used to avoid loss of volatile components.
- may be prepared by reaction of compounds of structure (XII) with d 0 with cyclopentadiene, as is known in the art.
- the wettable FAP is a copolymer which also comprises a repeat unit derived from at least one fluoroolefin, which is an ethylenically unsaturated compound containing at least one fluorine atom attached to an ethylenically unsaturated carbon.
- the fluoroolefin comprises 2 to 20 carbon atoms.
- the comonomer is tetrafluoroethylene.
- the non-wettable FAP comprises a polymeric backbone having pendant groups comprising siloxane sulfonic acid.
- the siloxane pendant groups have the formula below: —O a Si(OH) b-a R 22 3-b R 23 R j SO 3 H wherein:
- a is from 1 to b;
- b is from 1 to 3;
- R 22 is a non-hydrolyzable group independently selected from the group consisting of alkyl, aryl, and arylalkyl;
- R 23 is a bidentate alkylene radical, which may be substituted by one or more ether oxygen atoms, with the proviso that R 23 has at least two carbon atoms linearly disposed between Si and R j ;
- the non-wettable FAP has a fluorinated backbone and pendant groups represented by the Formula (XIV)
- the non-wettable FAP has formula (XV)
- the pendant group is present at a concentration of 3-10 mol-%.
- Q 1 is H, k ⁇ 0, and Q 2 is F, which may be synthesized according to the teachings of Connolly et al., U.S. Pat. No. 3,282,875.
- Q 1 is H
- Q 2 is H
- g 0
- R f 2 is F
- Still other embodiments may be Synthesized according to the various teachings in Drysdale et Al., WO 9831716(A1), and co-pending US applications Choi et al, WO 99/52954(A1), and 60/176,881.
- the non-wettable FAP is a colloid-forming polymeric acid.
- colloid-forming refers to materials which are insoluble in water, and form colloids when dispersed into an aqueous medium.
- the colloid-forming polymeric acids typically have a molecular weight in the range of about 10,000 to about 4,000,000. In one embodiment, the polymeric acids have a molecular weight of about 100,000 to about 2,000,000.
- Colloid particle size typically ranges from 2 nanometers (nm) to about 140 nm. In one embodiment, the colloids have a particle size of 2 nm to about 30 nm. Any colloid-forming polymeric material having acidic protons can be used.
- the colloid-forming fluorinated polymeric acid has acidic groups selected from carboxylic groups, sulfonic acid groups, and sulfonimide groups. In one embodiment, the colloid-forming fluorinated polymeric acid is a polymeric sulfonic acid. In one embodiment, the colloid-forming polymeric sulfonic acid is perfluorinated. In one embodiment, the colloid-forming polymeric sulfonic acid is a perfluoroalkylenesulfonic acid.
- the non-wettable colloid-forming FAP is a highly-fluorinated sulfonic acid polymer (“FSA polymer”).
- FSA polymer highly-fluorinated sulfonic acid polymer
- “Highly fluorinated” means that at least about 50% of the total number of halogen and hydrogen atoms in the polymer are fluorine atoms, an in one embodiment at least about 75%, and in another embodiment at least about 90%.
- the polymer is perfluorinated.
- sulfonate functional group refers to either to sulfonic acid groups or salts of sulfonic acid groups, and in one embodiment alkali metal or ammonium salts.
- E 5 is a cation, also known as a “counterion”
- E 5 may be H, Li, Na, K or N(R 1 ) (R 2 )(R 3 )(R 4 ), and R 1 , R 2 , R 3 , and R 4 are the same or different and are and in one embodiment H, CH 3 or C 2 H 5 .
- E 5 is H, in which case the polymer is said to be in the “acid form”.
- E 5 may also be multivalent, as represented by such ions as Ca ++ , and Al +++ , It is clear to the skilled artisan that in the case of multivalent counterions, represented generally as M ++ , the number of sulfonate functional groups per counterion will be equal to the valence “x”.
- the FSA polymer comprises a polymer backbone with recurring side chains attached to the backbone, the side chains carrying cation exchange groups.
- Polymers include homopolymers or copolymers of two or more monomers. Copolymers are typically formed from a non-functional monomer and a second monomer carrying the cation exchange group or its precursor, e.g., a sulfonyl fluoride group (—SO 2 F), which can be subsequently hydrolyzed to a sulfonate functional grop.
- a sulfonyl fluoride group e.g., a sulfonyl fluoride group (—SO 2 F)
- —SO 2 F sulfonyl fluoride group
- Possible first monomers include tetrafluoroethylene (TFE), hexafluoropropylene, vinyl fluoride, vinylidine fluoride, trifluoroethylene, chlorotrifluoroethylene, perfluoro(alkyl vinyl ether), and combinations thereof.
- TFE is a preferred first monomer.
- possible second monomers include fluorinated vinyl ethers with sulfonate functional groups or precursor groups which can provide the desired side chain in the polymer. Additional monomers, including ethylene, propylene, and R—CH ⁇ CH 2 where R is a perfluorinated alkyl group of 1 to 10 carbon atoms, can be incorporated into these polymers if desired.
- the polymers may be of the type referred to herein as random copolymers, that is, copolymers made by polymerization in which the relative concentrations of the comonomers are kept as constant as possible, so that the distribution of the monomer units along the polymer chain is in accordance with their relative concentrations and relative reactivities.
- Block copolymers such as that disclosed in European Patent Application No. 1 026 152 A1, may also be used.
- the FSA polymers include, for example, polymers disclosed in U.S. Pat. No. 3,282,875 and in U.S. Pat. Nos. 4,358,545 and 4,940,525.
- An example of preferred FSA polymer comprises a perfluorocarbon backbone and the side chain represented by the formula —O—CF 2 CF(CF 3 )—O—CF 2 CF 2 SO 3 E 5 where X is as defined above.
- FSA polymers of this type are disclosed in U.S. Pat. No.
- 3,282,875 and can be made by copolymerization of tetrafluoroethylene (TFE) and the perfluorinated vinyl ether CF 2 ⁇ CF—O—CF 2 CF(CF 3 )—O— CF 2 CF 2 SO 2 F, perfluoro(3,6-dioxa-4-methyl-7-octenesulfonyl fluoride) (PDMOF), followed by conversion to sulfonate groups by hydrolysis of the sulfonyl fluoride groups and ion exchanged as necessary to convert them to the desired ionic form.
- TFE tetrafluoroethylene
- PMMAF perfluoro(3,6-dioxa-4-methyl-7-octenesulfonyl fluoride)
- 4,358,545 and 4,940,525 has the side chain —O—CF 2 CF 2 SO 3 E 5 , wherein E 5 is as defined above.
- This polymer can be made by copolymerization of tetrafluoroethylene (TFE) and the perfluorinated vinyl ether CF 2 ⁇ CF—O—CF 2 CF 2 SO 2 F, perfluoro(3-oxa-4-pentenesulfonyl fluoride) (POPF), followed by hydrolysis and further ion exchange as necessary.
- TFE tetrafluoroethylene
- POPF perfluoro(3-oxa-4-pentenesulfonyl fluoride)
- the FSA polymers for use in this invention typically have an ion exchange ratio of less than about 33.
- “ion exchange ratio” or “IXR” is defined as number of carbon atoms in the polymer backbone in relation to the cation exchange groups. Within the range of less than about 33, IXR can be varied as desired for the particular application. In one embodiment, the IXR is about 3 to about 33, and in another embodiment from about 8 to about 23.
- equivalent weight is defined to be the weight of the polymer in acid form required to neutralize one equivalent of sodium hydroxide.
- IXR sulfonate polymers disclosed in U.S. Pat. Nos. 4,358,545 and 4,940,525, e.g., the polymer having the side chain —O—CF 2 CF 2 SO 3 H (or a salt thereof), the equivalent weight is somewhat lower because of the lower molecular weight of the monomer unit containing a cation exchange group.
- the corresponding equivalent weight range is about 575 EW to about 1325 EW.
- the FSA polymers can be prepared as colloidal aqueous dispersions. They may also be in the form of dispersions in other media, examples of which include, but are not limited to, alcohol, water-soluble ethers, such as tetrahydrofuran, mixtures of water-soluble ethers, and combinations thereof.
- the polymer can be used in acid form.
- U.S. Pat. Nos. 4,433,082, 6,150,426 and WO 03/006537 disclose methods for making of aqueous alcoholic dispersions. After the dispersion is made, the concentration and the dispersing liquid composition can be adjusted by methods known in the art.
- Aqueous dispersions of the colloid-forming polymeric acids typically have particle sizes as small as possible and an EW as small as possible, so long as a stable colloid is formed.
- Aqueous dispersions of FSA polymer are available commericially as Nafion® dispersions, from E.I. du Pont de Nemours and Company (Wilmington, Del.).
- the doped semiconductive polymers are formed by oxidative polymerization of the precursor monomer in the presence of at least one FAP.
- the doped semiconductive polymers are abbreviated hereinafter as “SCP/FAP”.
- the polymerization is generally carried out in a homogeneous aqueous solution.
- the polymerization for obtaining the electrically conducting polymer is carried out in an emulsion of water and an organic solvent. In general, some water is present in order to obtain adequate solubility of the oxidizing agent and/or catalyst. Oxidizing agents such as ammonium persulfate, sodium persulfate, potassium persulfate, and the like, can be used.
- a catalyst, such as ferric chloride, or ferric sulfate may also be present.
- the resulting polymerized product will be a solution, dispersion, or emulsion of the doped semiconductive polymer.
- the method of making an aqueous dispersion of the semiconductive polymer doped with EAP includes forming a reaction mixture by combining water, at least one precursor monomer, at least one FAP, and an oxidizing agent, in any order, provided that at least a portion of the FAP is present when at least one of the precursor monomer and the oxidizing, agent is added.
- the term “at least one precursor monomer” encompasses more than one type of monomer.
- the method of making an aqueous dispersion of the doped semiconductive polymer includes forming a reaction mixture by combining water, at least one precursor monomer, at least one FAP, and an oxidizing agent, in any order, provided that at least a portion of the FAP is present when at least one of the precursor monomer and the oxidizing agent is added.
- the method of making the doped semiconductive polymer comprises:
- the precursor monomer is added to the aqueous solution or dispersion of the FAP prior to adding the oxidizer. Step (b) above, which is adding oxidizing agent, is then carried out.
- a mixture of water and the precursor monomer is formed, in a concentration typically in the range of from about 0.5% by weight to about 4.0% by weight total precursor monomer.
- This precursor monomer mixture is added to the aqueous solution or dispersion of the FAP, and steps (b) above which is adding oxidizing agent is carried out.
- the aqueous polymerization mixture may include a polymerization catalyst, such as ferric sulfate, ferric chloride, and the like.
- the catalyst is added before the last step.
- a catalyst is added together with an oxidizing agent.
- the polymerization is carried out in the presence of co-dispersing liquids which are miscible with water.
- suitable co-dispersing liquids include, but are not limited to ethers, alcohols, alcohol ethers, cyclic ethers, ketones, nitrites, sulfoxides, amides, and combinations thereof.
- the co-dispersing liquid is an alcohol.
- the co-dispersing liquid is an organic solvent selected from n-propanol, isopropanol, t-butanol, dimethylacetamide, dimethylformamide, N-methylpyrrolidone, and mixtures thereof.
- the amount of co-dispersing liquid should be less than about 60% by volume.
- the amount of co-dispersing liquid is less than about 30% by volume. In one embodiment, the amount of co-dispersing liquid is between 5 and 50% by volume.
- the use of co-dispersing liquid in the polymerization significantly reduces particle size and improves filter-ability of the dispersions.
- buffer materials obtained by this process show an increased viscosity and films prepared from these dispersions are of high quality.
- the co-dispersing liquid can be added to the reaction mixture at any point in the process.
- the polymerization is carried out in the presence of a co-acid which is a Br ⁇ nsted acid.
- the acid can be an organic acid, such as HCl, sulfuric acid, and the like, or an organic acid, such as acetic acid or p-toluenesulfonic acid.
- the acid can be a water soluble polymeric acid such as poly(styrenesulfonic acid), poly(2-acrylamido-2-methyl-1-propanesulfonic acid, or the like, or a second fluorinated acid polymer, as described above. Combinations of acids can be used.
- the co-acid can be added to the reaction mixture at any point in the process prior to the addition of either the oxidizer or the precursor monomer, whichever is added last. In one embodiment, the co-acid is added before both the precursor monomers and the fluorinated acid polymer, and the oxidizer is added last. In one embodiment the co-acid is added prior to the addition of the precursor monomers, followed by the addition of the fluorinated acid polymer, and the oxidizer is added last.
- the polymerization is carried out in the Presence of both a co-dispersing liquid and a co-acid.
- the molar ratio of oxidizer to total precursor monomer is generally in the range of 0.1 to 3.0; and in one embodiment is 0.4 to 1.5.
- the molar ratio of FAP to total precursor monomer is generally in the range of from 0.2 to 10. In one embodiment, the ratio is in the range of 1 to 5.
- the overall solid content is generally in the range of about 0.5% to 12% in weight percentage; and in one embodiment of about 2% to 6%.
- the reaction temperature is generally in the range of about 4° C. to 50° C.; in one embodiment about 20° C. to 35° C.
- the molar ratio of optional co-acid to precursor monomer is about 0.05 to 4.
- the addition time of the oxidizer influences particle size and viscosity. Thus, the particle size can be reduced by slowing down the addition speed. In parallel, the viscosity is increased by slowing down the addition speed.
- the reaction time is generally in the range of about 1 to about 30 hours.
- the aqueous dispersions of the doped semiconductive polymers generally have a very low pH.
- the pH of the dispersion can be adjusted to about 1.5 to about 4.
- the pH is adjusted to between 2 and 3. It has been found that the pH can be adjusted using known techniques, for example, ion exchange or by titration with an aqueous basic solution.
- the as-formed aqueous dispersion of FAP-doped semiconductive polymer is contacted with at least one ion exchange resin under conditions suitable to remove any remaining decomposed species, side reaction products, and unreacted monomers, and to adjust pH, thus producing a stable, aqueous dispersion with a desired pH.
- the as-formed doped semiconductive polymer dispersion is contacted with a first ion exchange resin and a second ion exchange resin, in any order.
- the as-formed doped semiconductive polymer dispersion can be treated with both the first and second ion exchange resins simultaneously, or it can be treated sequentially with one and then the other.
- the two doped semiconductive polymers are combined as-synthesized, and then treated with one or more inn exchange resins.
- Ion exchange is a reversible chemical reaction wherein an ion in a fluid medium (such as an aqueous dispersion) is exchanged, for a similarly charged ion attached to an immobile solid particle that is insoluble in the fluid medium.
- a fluid medium such as an aqueous dispersion
- the term “ion exchange resin” is used herein to refer to all such substances. The resin is rendered insoluble due to the crosslinked nature of the polymeric support to which the ion exchanging groups are attached.
- Ion exchange resins are classified as cation exchangers or anion exchangers. Cation exchangers have positively charged mobile ions available for exchange, typically protons or metal ions such as sodium ions.
- Anion exchangers have exchangeable ions which are negatively charged, typically hydroxide ions.
- the first ion exchange resin is a cation, acid exchange resin which can be in protonic or metal ion, typically sodium ion, form.
- the second ion exchange resin is a basic, anion exchange resin. Both acidic, cation including proton exchange resins and basic, anion exchange resins are contemplated for use in the practice of the invention.
- the acidic, cation exchange resin is an inorganic acid, cation exchange resin, such as a sulfonic acid cation exchange resin.
- Sulfonic acid cation exchange resins contemplated for use in the practice of the invention include, for example, sulfonated styrene-divinylbenzene copolymers, sulfonated crosslinked styrene polymers, phenol-formaldehyde-sulfonic acid resins, benzene-formaldehyde-sulfonic acid resins, and mixtures thereof.
- the acidic, cation exchange resin is an organic acid, cation exchange resin, such as carboxylic acid, acrylic or phosphorous cation exchange resin.
- mixtures of different cation exchange resins can be used.
- the basic, anionic exchange resin is a tertiary amine anion exchange resin.
- Tertiary amine anion exchange resins contemplated for use in the practice of the invention include, for example, tertiary-aminated styrene-divinylbenzene copolymers, tertiary-aminated crosslinked styrene polymers, tertiary-aminated phenol-formaldehyde resins, tertiary-aminated benzene-formaldehyde resins, and mixtures thereof.
- the basic, anionic exchange resin is a quaternary amine anion exchange resin, or mixtures of these and other exchange resins.
- the first and second ion exchange resins may contact the as-formed aqueous dispersion either simultaneously, or consecutively.
- both resins are added simultaneously to an as-formed aqueous dispersion of an electrically conducting polymer, and allowed to remain in contact with the dispersion for at least about 1 hour, e.g., about 2 hours to about 20 hours.
- the ion exchange resins can then be removed from the dispersion by filtration.
- the size of the filter is chosen so that the relatively large ion exchange resin particles will be removed while the smaller dispersion particles will pass through.
- the ion exchange resins quench polymerization and effectively remove ionic and non-ionic impurities and most of unreacted monomer from the as-formed aqueous dispersion.
- the basic, anion exchange and/or acidic, cation exchange resins renders the acidic sites more basic, resulting in increased pH of the dispersion. In general, about one to five grams of ion exchange resin is used per gram of semiconductive polymer composition.
- the basic ion exchange resin can be used to adjust the pH to the desired level.
- the pH can be further adjusted with an aqueous basic solution such as a solution of sodium hydroxide, ammonium hydroxide, tetramethylammonium hydroxide, or the like.
- the new buffer compositions can be formed by blending the semiconductive oxide particles with the FAP or the SCP/FAP. This can be accomplished by adding an aqueous dispersion of the semiconductive oxide particles to an aqueous dispersion of the FAP or the SCP/FAP. In one embodiment, the composition is further treated using sonication or microfluidization to ensure mixing of the components.
- one or both of the components are isolated in solid form.
- the solid material can be redispersed in water or in aqueous solution or dispersion of the other component.
- semiconductive oxide particle solids can be dispersed in an aqueous solution or dispersion of a semiconductive polymer doped with an FAP.
- buffer layer or “buffer material” is intended to mean electrically conductive or semiconductive materials and may have one or more functions in an organic electronic device, including but not limited to, planarization to the underlying layer, charge transport and/or charge injection properties, scavenging of impurities such as oxygen or metal ions, and other aspects to facilitate or to improve the performance of the organic electronic device.
- layer is used interchangeably with the term “film” and refers to a coating covering a desired area. The sense of the term is not limited or qualified by considerations of the size of a coated area. The area can be as large as an entire device or as small as a specific functional area such as the actual visual display, or as small as a single sub-pixel.
- the buffer layer is formed using a liquid deposition method. Any liquid deposition method can be used. Continuous liquid deposition techniques, include but are not limited to, spin coating, gravure coating, curtain coating, dip coating, slot-die coating, spray coating, and continuous nozzle coating. Discontinuous liquid deposition techniques include, but are not limited to, ink jet printing, gravure printing, and screen printing.
- buffer layers deposited from aqueous dispersions comprising the new conductive polymer composition blended with other water soluble or dispersible materials.
- materials which can be added include, but are not limited to polymers, dyes, coating aids, organic and inorganic conductive inks and pastes, charge transport materials, crosslinking agents, and combinations thereof.
- the other water soluble or dispersible materials can be simple molecules or polymers.
- suitable polymers include, but are not limited to, conductive polymers such as polythiophenes, polyanilines, polypyrroles, polyacetylenes, and combinations thereof.
- electroactive layer when referring to a layer or material is intended to mean a layer or material that exhibits electronic or electro-radiative properties.
- An electroactive layer material may emit radiation or exhibits a change in concentration of electron-hole pairs when receiving radiation.
- a typical device, 100 has an anode layer 110 , a buffer layer 120 , an electronic layer 130 , and a cathode layer 150 . Adjacent to the cathode layer 150 is an optional electron-injection/transport layer 140 .
- the device may include a support or substrate (not shown) that can be adjacent to the anode layer 110 or the cathode layer 150 . Most frequently, the support is adjacent the anode layer 110 .
- the support can be flexible or rigid, organic or organic. Examples of support materials include, but are not limited to, glass, ceramic, metal, and plastic films.
- the anode layer 110 is an electrode that is more efficient for injecting holes compared to the cathode layer 150 .
- the anode can include materials containing a metal, mixed metal, alloys, metal oxide or mixed oxide. Suitable materials include the mixed oxides of the Group 2 elements (i.e., Be, Mg, Ca, Sr, Ba, Ra), the Group 11 elements, the elements in Groups 4, 5, and 6, and the Group 8-10 transition elements. If the anode layer 110 is to be light transmitting, mixed oxides of Groups 12, 13 and 14 elements, such as indium-tin-oxide, may be used. As used herein, the phrase “mixed oxide” refers to oxides having two or more different cations selected from the Group 2 elements or the Groups 12, 13, or 14 elements.
- anode layer 110 examples include, but are not limited to, indium-tin-oxide (“ITO”), Indium-zinc-oxide, aluminum-tin-oxide, gold, silver, copper, and nickel.
- the anode may also comprise an organic material, especially a conducting polymer such as polyaniline, including exemplary materials as described in “Flexible light-emitting diodes made from soluble conducting polymer,” Nature vol. 357, pp 477 479 (11 Jan. 1992). At least one of the anode and cathode should be at least partially transparent to allow the generated light to be observed.
- the anode layer 110 may be formed by a chemical or physical vapor deposition process or spin-cast process.
- Chemical vapor deposition may be performed as a plasma-enhanced chemical vapor deposition (“PECVD”) or metal organic chemical vapor deposition (“MOCVD”).
- Physical vapor deposition can include all forms of sputtering, including ion beam sputtering, as well as e-beam evaporation and resistance evaporation.
- Specific forms of physical vapor deposition include rf magnetrons sputtering and inductively-coupled plasma physical vapor deposition (“IMP-PVD”). These deposition techniques are well known within the semiconductor fabrication arts.
- the anode layer 110 is patterned during a lithographic operation.
- the pattern may vary as desired.
- the layers can be formed in a pattern by, for example, positioning a patterned mask or resist on the first flexible composite barrier structure prior to applying the first electrical contact layer material.
- the layers can be applied as an overall layer (also called blanket deposit) and subsequently patterned using, for example, a patterned resist layer and wet chemical or dry etching techniques. Other processes for patterning that are well known in the art can also be used.
- the buffer layer 120 is usually deposited onto substrates using a variety of techniques well-known to those skilled in the art. Typical deposition techniques, as discussed above, include liquid deposition (continuous and discontinuous techniques), and thermal transfer.
- An optional layer, not shown, may be present between the buffer layer 120 and the electroactive layer 130 .
- This layer may comprise hole transport materials. Examples of hole transport materials for layer 120 have been summarized for example, in Kirk-Othmer Encyclopedia of Chemical Technology, Fourth Edition, Vol. 18, p. 837-860, 1996, by Y. Wang. Both hole transporting molecules and polymers can be used.
- hole transporting molecules include, but are not limited to: 4,4′,4′′-tris(N,N-diphenyl-amino)-triphenylamine (TDATA); 4,4′,4′′-tris(N-3-methylphenyl-N-phenylamino)-triphenylamine (MTDATA); N,N′-diphenyl-N,N′-bis(3-methylphenyl)-[1,1′-biphenyl]-4,4′-diamine (TPD); 1,1-bis[(di-4-tolylamino)phenyl]cyclohexane (TAPC); N,N′-bis-(4-methylphenyl)-N,N′-bis(4-ethylphenyl)-[1,1′-(3,3′-dimethyl)biphenyl]-4,4′-diamine (ETPD); tetrakis-(3-methylphenyl)-N,N, N′,N′-2,
- hole transporting polymers include, but are not limited to, poly(9,9,-dioctylfluorene-co-N-(4-butylphenyl)diphenylaminer), and the like, polyvinylcarbazole, (phenylmethyl)polysilane, poly(dioxythiophenes), polyanilines, and polypyrroles. It is also possible to obtain hole transporting polymers by doping hole transporting molecules such as those mentioned above into polymers such as polystyrene and polycarbonate.
- the electroactive layer 130 can be a light-emitting layer that is activated by an applied voltage (such as in a light-emitting diode or light-emitting electrochemical cell), a layer of material that responds to radiant energy and generates a signal with or without an applied bias voltage (such as in a photodector).
- the electroactive material is an organic electroluminescent (“EL”) material. Any EL material can be used in the devices, including, but not limited to, small molecule organic fluorescent compounds, fluorescent and phosphorescent metal complexes, conjugated polymers, and mixtures thereof.
- fluorescent compounds include, but are not limited to, pyrene, perylene, rubrene, coumarin, derivatives thereof, and mixtures thereof.
- metal complexes include, but are not limited to, metal chelated oxinoid compounds, such as tris(8-hydroxyquinolato)aluminum (Alq3); cyclometalated iridium and platinum electroluminescent Compounds, such as complexes of iridium with Phenylpyridine, phenylquinoline, or phenylpyrimidine ligands as disclosed in Petrov et al., U.S. Pat. No.
- Electroluminescent emissive layers comprising a charge carrying host mateiral and a metal complex have been described by Thompson et al., in U.S. Pat. No. 6,303,238, and by Burrows and Thompson in published PCT applications WO 00/70655 and WO 01/41512.
- conjugated polymers include, but are not limited lited to poly(phenylenevinylenes), polyfluorenes, poly(spirobifluorenes), polythiophenes, poly(p-phenylenes), copolymers thereof, and mixtures thereof.
- Optional layer 140 can function both to facilitate electron injection/transport, and can also serve as a confinement layer to prevent quenching reactions at layer interfaces. More specifically, layer 140 may promote electron mobility and reduce the likelihood of a quenching reaction if layers 130 and 150 would otherwise be in direct contact.
- materials for optional layer 140 include, but are not limited to, metal chelated oxinoid compounds, such as bis(2-methyl-8-quinolinolato)(para-phenyl-phenolato)aluminum(III) (BAIQ), tetra(8-hydroxyquinolato)zirconium (ZrQ), and tris(8-hydroxyquinolato)aluminum (Alq 3 ); azole compounds such as 2-(4-biphenylyl)-5-(4-t-butylphenyl)-1,3,4-oxadiazole (PBD), 3-(4-biphenylyl)-4-phenyl-5-(4-t-butylphenyl)-1,2,4-triazole (TAZ), and 1,3,5-tri(phenyl-2-benzimidazole)benzene (TPBI); quinoxaline derivatives such as 2,3-bis(4-fluorophenyl)quinoxaline; phenanthroline derivatives such as 9,10
- the cathode layer 150 is an electrode that is particularly efficient for injecting electrons or negative charge carriers.
- the cathode layer 150 can be any metal or nonmetal having a lower work function than the first electrical contact layer (in this case, the anode layer 110 ).
- Materials for the cathode layer can be selected from alkali metals of Group I (e.g., Li, Na, K, Rb, Cs,), the Group 2 metals (e.g., Mg, Ca, Ba, or the like), the Group 12 metals, the lanthanides (e.g., Ce, Sm, Eu, or the like), and the actidines (e.g., Th, U, or the like).
- Materials such as aluminum, indium, Yttrium, and combinations thereof, may also be used.
- Specific non-limiting examples of materials for the cathode layer 150 include, but are not limited to, barium, lithium, cerium, cesium, europium, rubidium, yttrium, magnesium, samarium, and alloys and combinations thereof.
- the cathode layer 150 is usually formed by a chemical or Physical vapor deposition process. In some embodiments, the cathode layer will be patterned, as discussed above in reference to the anode layer 110 .
- an encapsulation layer (not shown) is deposited over the contact layer 150 to prevent entry of undesirable components, such as water and oxygen, into the device 100 . Such components can have a deleterious effect on the organic layer 130 .
- the encapsulation layer is a barrier layer or film.
- the encapsulation layer is a glass lid.
- the device 100 may comprise additional layers. Other layers that are known in the art or otherwise may be used. In addition, any of the above-described layers may comprise two or more sub-layers or may form a laminar structure. Alternatively, some or all of anode layer 110 the buffer layer 120 , the electron transport layer 140 , cathode layer 150 , and other layers may be treated, especially surface treated, to increase charge carrier transport efficiency or other physical properties of the devices.
- the choice of materials for each of the component layers is preferably determined by balancing the goals of providing a device with high device efficiency with device operational lifetime considerations, fabrication time and complexity factors and other considerations appreciated by persons skilled in the art. It will be appreciated that determining optimal components, component configurations, and compositional identities would be routine to those of ordinary skill of in the art.
- the different layers have the following ranges of thicknesses anode 110 , 500-5000 ⁇ , in one embodiment 1000-2000 ⁇ ; buffer layer 120 , 50-2000 ⁇ , in one embodiment 200-1000 ⁇ , optional transport layer, 50-2000 ⁇ , in one embodiment 100-1000 ⁇ ; photoactive layer 130 , 10-2000 ⁇ , in one embodiment 100-1000 ⁇ ; optional electron transport layer 140 , 50-2000 ⁇ , in one embodiment 100-1000 ⁇ ; cathode 150 , 200-10000 ⁇ , in one embodiment 300-5000 ⁇ .
- the location of the electron-hole recombination zone in the device, and thus the emission spectrum of the device, can be affected by the relative thickness of each layer.
- the thickness of the electron-transport layer should be chosen so that the electron-hole recombination zone is in the light-emitting layer.
- the desired ratio of layer thicknesses will depend on the exact nature of the materials used.
- a voltage from an appropriate power supply (not depicted) is applied to the device 100 .
- Current therefore passes across the layers of the device 100 . Electrons enter the organic polymer layer, releasing photons.
- OLEDs called active matrix OLED displays
- individual deposits of photoactive organic films may be independently excited by the passage of current; leading to individual pixels of light emission.
- OLEDs called passive matrix OLED displays
- deposits of photoactive organic films may be excited by rows and columns of electrical contact layers.
- the terms “comprises,” “comprising,” “includes,” “including,” “has,” “having” or any other variation thereof, are intended to cover a non-exclusive inclusion.
- a process, method, article, or apparatus that comprises a list of elements is not necessarily limited to only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
- “or” refers to an inclusive or and not to an exclusive or. For example, a condition A or B is satisfied by any one of the following: A is true (or present) and B is false (or not present), A is false (or not present) and B is true (or present), and both A and B are true (or present).
- the term “layer” is used interchangeably with the mon “film” and refers to a coating covering a desired area. The meaning is not affected by the size of the area coated.
- the area can be as large as art entire device or as small as a specific functional area such as the actual visual display, or as small as a single sub-pixel.
- Layers and films can be formed by any conventional deposition technique, including vapor deposition, liquid deposition (continuous and discontinuous techniques), and thermal transfer.
- Continuous deposition techniques include but are not limited to, spin coating, gravure coating, curtain coating, dip coating, slot-die coating, spray coating, and continuous nozzle coating.
- Discontinuous deposition techniques include, but are not limited to, ink jet printing, gravure printing, and screen printing.
- work function is intended to mean the minimum energy needed to remove an electron from a material to a point at infinite distance away from the surface.
- Nafion® is a trade name for poly(perfluoroethylene sulfonic acid) from E.I. do Pont de Nemours and Company (Wilmington, Del.).
- Celnax CX-Z300H purchased from Nissan Chemical Industries, LTD from Houston, Tex.
- the Celnax is antimony double oxide hydrosol, which contains 30% (w/w) oxide and about 70% water. It has pH 6.9 and particle size of 20 nm using BET method. Thin layer of dried film of the material is bluish green color and almost transparent.
- 2.0112 g of Celnax was first diluted with 4.9748 g de-ionized water 1.632 g Nafion® dispersion, which contains 12.23% (w/w) Nafion® polymer, was then added to the diluted Celnax dispersion. They mixed easily and formed a stable dispersion without a sign of sedimentation.
- a couple of drops of the dispersion were placed on a microscope slide to form a thin, transparent film.
- the thin film was painted with silver paste to form two parallel lines as electrodes for measurement of resistance.
- the resistance was converted to conductivity by taking a thickness of the film and separating the two electrodes along the length of the electrodes.
- Conductivity was determined to be 8 ⁇ 10 4 S/cm. This conductivity is suitable as a buffer layer.
- the dried film will be measured for Wf by Ultraviolet Photoelectron Spectroscopy (UPS).
- Wf energy level is usually determined from second electron cut-off with respect to the position of vacuum level using HeI (21.22 eV) radiation.
- Nafion® is a trademark for poly(perfluoroethylenesulfonic acid) from E.I. du Pont de Nemours and Company.
- ITO/glass substrates consist of 15 mm ⁇ 20 mm ITO area at the center having ITO thickness of from 100 to 150 nm. At one corner of 15 mm ⁇ 20 mm ITO area, ITO film surface extended to the edge of the glass/ITO serves as electrical contact with Kevlin probe electrode. Prior to spin coating, ITO/glass substrates were cleaned and the ITO sides were subsequently treated with UV-ozone for 10 minutes.
- the deposited materials on the corner of the extended ITO film were removed with a Q-tip wetted with ether water.
- the exposed ITO pad was for making contact with Kelvin probe electrode.
- the deposited films were then baked as illustrated in Examples. The baked film samples were then placed on a glass jug flooded with nitrogen before capped with a lid before measurement.
- an ambient-aged gold film was measured first as a reference prior to measurement of samples.
- the gold film on a same size of glass piece was placed in a cavity cut out at the bottom of a square steel container.
- On the side of the cavity there are four retention clips to keep sample piece firmly in place.
- One of the retention clips is attached with electrical wire for making contact with the Kelvin probe.
- the gold film was facing up while a Kelvin probe tip protruded from the center of a steel lid was lowered to above the center of the gold film surface. The lid was then screwed tightly onto the square steel container at four corners.
- a side port on the square steel container was connected with tubing for allowing nitrogen to sweep the Kelvin probe cell continuously while a nitrogen exit port capped with a septum in which a steel needle is inserted for maintaining ambient pressure.
- the probe settings were then optimized for the probe and only height of the tip was changed through entire measurement.
- the Kelvin probe was connected to a McAllister KP6500 Kelvin Probe meter having the following parameters: 1) frequency: 230; 2) amplitude: 20; 3) DC offset: varied from sample to sample; 4) upper backing potential: 2 volt; 5) lower backing potential: ⁇ 2 volt; 6)scan rate: 1; 7) trigger delay: 0; 8) acquisition(A)/data(D) points:1024; 9) A/D rate: L2405 @19.0 cycles: 10) D/A: delay: 200; 11) set point gradient: 0.2; 12) step size: 0.001; 13) maximum gradient deviation: 0.001.
- the contact potential difference (“CPD”) in volt between gold film was recorded.
- the CPD of gold was then referencing the probe tip to (4.7-CPD) eV.
- the 4.7 eV electron volt
- the CPD of gold was measured periodically while CPD of samples were being determined. Each sample was loaded into the cavity in the same manner as gold film sample with the four retention clips. On the retention clip making electrical contact with the sample care was taken to make sure good electrical contact was made with the exposed ITO pad at one corner. During the CPD measurement a small stream of nitrogen was flowed through the cell continuously without disturbing the probe tip. Once CPD of sample was recorded, the sample work-function or energy potential was then calculated by adding CPD of the sample to the difference of 4.7 eV and CPD of gold.
- Celnax CX-Z300H used for illustration was also purchased from Nissan Chemical Industries, LTD from Houston, Tex.
- the Celnax is antimony double oxide (antimony zirconate) hydrosol, which was determined to contain 274.0% (w/w) oxide and the rest is water. It has pH 6.9 and particle size of 20 nm using BET method.
- a diluted CX-Z300H was made by mixing 5.004 g of the hydrosol with 13.825 g deionized water. The diluted sample contains only 7.19% (w/w) oxide. It was spin-coated at a speed of 1,800 rpm for 60 seconds on one of the ITO substrates described in the general procedure of film sample preparation.
- the zinc/antimony double oxide film on the ITO/glass substrate was then baked at 130° C. in air for 10 minutes.
- a gold film was measured first.
- Contact potential difference (CPD) between gold film and the Kelvin probe tip is 0.663 volt.
- CPD between the oxide film and Kelvin probe tip was determined to be 0.87 volt.
- Work-function of the antimony oxide surface was therefore calculated to be 4.91 eV using 4.7 eV for work-function of air-aged gold.
- This work-function (Wf) data is listed in Table 1 as a control to determine effect of addition of Nafion® on its work-function.
- Nafion® used for addition to CX-Z300H has an EW of 1000 and was made using a procedure similar to the procedure in U.S. Pat. No 6,150,426, Example 1, Part 2, except that the temperature is approximately 270° C.
- Nafion® is at 25% (w/w) in water.
- the 25% dispersion was first diluted to 12% before use.
- the general procedure for making the mixture was to add the Nafion® to CX-Z300H which was diluted with water first.
- Final solid concentration was aimed at about 7.2% (w/w) in water, but the ratio of acid-equivalent/1 g double oxide was kept at five different levels.
- This example illustrates the effect of the addition of Poly (VF2/PSEBVE) to a semiconductive oxide dispersion on its work-function.
- Celnax CX-Z300H was also used to determine effect of poly(VF2/PSEBVE) on work-function of zinc/antimony double oxide. Synthesis of of Poly(VF2/PSEBVE) was illustrated later in this example. The procedure described in Example 2 for film preparation of zinc/antimony oxide, and its admixture with Poly(VF2/PSEBVE), and contact potential difference measurement for determination of work-function was closely followed. The work-function data listed in Table 2 clearly shows that work-function of antimony/zinc double oxide film surface is low, but increase as Nafion® is added to CX-Z300H. High work-function is critical for OLEDs as a buffer layer for device function.
- Poly(VF2/PSEBVE) used for adding to Celnax CX-Z300H was made as follows.
- VF2/PSEBVE organic solvent wettable Poly(VF2/PSEBVE) of 1,1-difluoroethylene (“VF2”) and 2-(1,1-difluoro-2-trifluoromethyl)allyloxy)-1,1,2,2-tetrafluoroethanesulfonyl fluoride (“PSEBVE”):
- a 400 mL Hastelloy C276 reaction vessel was charged with 160 mL of Vertrel® XF, 4 mL of a 20 wt. % solution of HFPO dimer peroxide in Vertrel® XF, and 143 g of PSEBVE (0.42 mol).
- the vessel was cooled to ⁇ 35° C., evacuated to ⁇ 3 PSIG, and purged with nitrogen. The evacuate/purge cycle was repeated two more times.
- To the vessel was then added 29 g VF 2 (0.45 mol).
- the vessel was heated to 28° C., which increased the pressure to 92 PSIG.
- the reaction temperature was maintained at 28° C. for 18 h at which time the pressure had dropped to 32 PSIG.
- the vessel was vented and the crude liquid material was recovered.
- the Vertrel® XF was removed in vacuo to afford 110 g of desired copolymer.
- Films made from VF 2 -PSEBVE acid are wettable by organic solvents. Phenylhexane will have a contact angle less than 40° on the films.
- This example illustrates the effect of the addition of Poly (E/PSEPVE) to a semiconductive oxide dispersion on its work-function.
- Celnax CX-Z300H was also used to determine effect of poly(E/PSEPVE) on work-function of zinc/antimony double oxide.
- Synthesis of of Poly(E/PSEPVE) was described later in this example.
- the procedure described in Example 2 for film preparation of zinc/antimony oxide, and its admixture with Poly(E/PSEPVE), and contact potential difference measurement for determination of work-function was closely followed.
- the work-function data listed in Table 3 clearly shows that addition of Poly(E/PSEPVE) to CX-Z300H has enhanced work-function of antimony/zinc double oxide. High work-function is critical for OLEDs as a buffer layer for device function.
- Poly(E/PSEPVE) used for adding to Celnax CX-Z300H was made as follows.
- Hastelloy C276 reaction vessel was changed with 60 g of PSEPVE (0.13 mol) and 1 mL of a 0.17 M solution of HFPO dimer peroxide in Vertrel® XF.
- the vessel was cooled to ⁇ 35° C., evacuated to ⁇ 3 PSIG, and purged with nitrogen. The evacuate/purge cycle was repeated two more times.
- To the vessel was then added 20 g ethylene (0.71 mol) and an additional 900 PSIG of nitrogen gas.
- the vessel was heated to 24° C., which increased the pressure of 1400 PSIG.
- the reaction temperature was maintained at 24° C. for 18 h. at which time the pressure had dropped to 1350 PSIG.
- the vessel was vented and 61.4 g of crude material was recovered. 10 g of this material were dried at 85° C. and 20 milliTorr for 10 h. to give 8.7 g of dried polymer.
- a mixture of 19.6 g of dried polymer and 5.6 g lithium carbonate were refluxed in 300 mL of dry methanol for 6 h. The mixture was brought to room temperature and filtered to remove any remaining solids. The methanol was removed in vacuo to afford 15.7 g of the lithium salt of the polymer.
- the lithium salt of the polymer was then dissolved in water and added with Amberlyst 15, a protonic acid exchange resin which had been washed thoroughly with water until there was no color in the water. The mixture was stirred and filtered. Filtrate was added with fresh Amberlyst 15 resin and filtered again. The step was repeated two more times. Water was then removed from the final filtrates and the solids were then dried in a vacuum oven.
- Films made from E-PSEPVE acid are wettable by organic solvents. Phenylhexane will have a contact angle less than 40° on the films.
- Celnax CX-Z300H was also used to determine effect of poly(NBD/PSEPVE) on work-function of zinc/antimony double oxide. Synthesis of of Poly(NBD/PSEPVE) was described later in this example. The procedure described in Example 2 for film preparation of a mixture of zinc/antimony oxide and Poly(NBD/PSEPVE), and contact potential difference measurement for determination of work-function was closely followed. The work-function data listed in Table 3 clearly shows that addition of Poly(NBD/PSEPVE) to DX-Z300H has enhanced work-function of antimony/zinc double oxide. High work-function is critical for OLEDs as a buffer layer for device function.
- Poly(NBD/PSEPVE) used for adding to Celnax CX-Z300H was made as follows.
- Hastelloy C276 reaction vessel was charged with a mixture of 2,5-norbornadiene (98%, Aldrich, 100 g), and hydroquinone (0.5 g). The vessel was cooled to ⁇ 6° C., evacuated to ⁇ 20 PSIG, and purged with nitrogen. The pressure was again reduced to ⁇ 20 PSIG and 2-(1,2,2-trifluorovinyloxy)-1,1,2,2-tetrafluoroethanesulfonyl fluoride (305 g) was added. The vessel was agitated and heated to 190° C. at which time the inside pressure was 126 PSIG. The reaction temperature was maintained at 190° C. for 6 h. The pressure dropped to 47 PSIG at which point the vessel was vented and cooled to 25° C.
- a 400 mL pressure vessel was swept with nitrogen and charged with 74.4 g (0.20 mL) of NBD-PSEVE, 50 mL of Solkane 365 mfc (1,1,1,3,3-pentrafluorobutane 0.80 g of Perkadox® 16N.
- the vessel was closed, cooled in dry ice, evacuated, and changed with 30 g (0.30 mol) of TFE.
- the vessel contents were heated to 50° C. and agitated for 18 hr as the internal pressure decreased from 195 to 164 psi.
- the vessel was cooled to temperature and vented to one atmosphere.
- the vessel contents were added slowly to excess hexane.
- the entire content ( ⁇ 376 g) of the hydrolyzed mixture was further treated for conversion to acid.
- 30 g protonic exchange resins were added to the mixture and left stirred for 1 hr.
- the resin was filtered and fresh 30 g acid resins were added and left stirred for 15 hrs and filtered again.
- the filtrate was treated with fresh 20 g acidic resins for half an hour and again the filtrate was treated with fresh 30 g acidic resins for half an hour.
- the final filtrate was then placed in around bottom flask which was immersed in an oil bath heated to 60° C. Once two thirds of the content were removed through evaporation, the oil bath heat was turned off until the content became dried. Dried solid, which was yellowish, weighed 18.5 g.
- Nafion® is a trademark for poly(perfluoroethylenesulfonic acid) from E.I. du Pont de Nemours and Company (Wilmington, Del., USA).
- Celnax CX-Z641 M used for illustration was also purchased from Nissan Chemical Industries, LTD from Houston, Tex.
- the Celnax is antimony double oxide methanosol, which was determined to contain 61.4% (w/w) oxide and the rest is methanol. It has pH 8.2 and particle size of 20 nm by BET method.
- a diluted CX-Z641 M was made by mixing 14.1889 g of the methanosol with 70.2178 g methanol. The diluted sample contains only 10.03% (w/w) oxide.
- Nafion®/methanol dispersion used for adding to CX-Z641 M was made as follow.
- An aqueous Nafion® dispersion having EW of 1000 was made first using a procedure similar to the procedure in U.S. Pat. No. 6,150,426, Example 1, Part 2, except that the temperature is approximately 270° C.
- aqueous Nafion® dispersion was then freeze-dried to Nafion® solids. 10.5475 g of the freeze-dried Nafion® solids were mixed with 94.2821 g methanol to obtain 10.06% (w/w) Nafion® in methanol.
- a portion of the Nafion®/zinc-antimony oxide/methanol dispersion was adjusted to pH 7.8 with aqueous NH4OH.
- the dispersion maintains its stability and baked film made from it still has work-function of 5.38 eV.
- This example illustrates device performance of a polymeric light emitting diode on an antimony/zinc double oxide film without containing Nafion®.
- the 10.03% (w/w) antimony/zinc double oxide in methanol produced semiconductive oxide films, which had work-function of 4.63 eV as illustrated in Example 6.
- the work-function is low and this comparative example is to demonstrate its device functions as a buffer layer for a light emitting diode.
- the 10.03% (w/w) antimony/zinc double oxide in methanol prepared in Example 6 was filtered through 0.45 ⁇ m HV filter for spin-coating at a speed of 3,000 rpm for 60 seconds on glass/ITO backlight substrates (30 mm ⁇ 30 mm) and baked at 130° C. in air for 15 minutes.
- Each ITO substrate having ITO thickness of 100 to 150 nm consists of 3 pieces of 5 mm ⁇ mm pixels and 1 piece of 2 mm ⁇ 2 mm pixel for light emission.
- the baked zinc/antimony oxide films had thickness of 100 nm.
- the ITO/glass substrates containing the double oxide film were transferred into a glove box and 76 nm of Lumation Green K2 1303 [1% (w/v) in p-Xylene spun at 1,000 RPM] from Sumitomo Chemicals Company (Japan) were spun on top.
- the Green K2 layer was baked at 130° C. on a hot plate inside the glove box for 30 minutes before transfer into an evaporator and evaporation of 3 nm of Barium and 250 nm of Aluminum as cathode. Encapsulation was done by epoxy and a glass coverslip.
- the device had current efficiency less than 0.7 cd/A from above zero to 3,000 nits.
- This example illustrates the effect of the addition of Nafion® dispersed in methanol on the performance of a semiconductive oxide dispersion of a polymeric light emitting diode.
- 10.04% (w/w) zinc-antimony oxide/Nafion® in methanol produced semiconductive oxide films which had work-function of 5.37 eV.
- the work-function is melt higher than that in comparative Example 1, where Nafion® was absent from the double oxide dispersion.
- This example demonstrates the films' device function as a buffer layer for a light emitting diode.
- the 10.04% (w/w) zinc-antimony oxide/Nafion® in methanol prepared in Example 6 was filtered through 0.45 ⁇ m HV filter for spin-coating at a speed of 5,000 rpm for 60 seconds on glass/ITO backlight substrates (30 mm ⁇ 30 mm) and baked at 130° C. in air for 15 minutes.
- This comparative example illustrates device performance of a polymeric light diode on an antimony/zinc double oxide film without Nafion®.
- Each ITO substrate having ITO thickness of 100 to 150 nm consists of 3 pieces of 5 mm ⁇ 5 mm pixels and 1 piece of 2 mm ⁇ 2 mm pixel for light emission.
- the baked zinc/antimony oxide films had thickness of 35 nm.
- the ITO/glass substrates containing the double oxide film were transferred into a glovebox and 76 nm of Lumination Green K2 1303 [1% (w/v) in p-Xylene spun at 1,000 RPM] from Sumitomo Chemicals Company (Japan) were spun on top.
- the Green K2 layers were baked at 130° C.
- the device has current efficiency less than 0.5 cd/A from above zero to 3,000 nits. The device efficiency is too low to be useful.
- This example illustrates the effect of the addition of Nafion® dispersed in water on the performance of a semiconductive oxide dispersion of a polymeric light diode.
- This example demonstrates the device function as a buffer layer for a light emitting diode.
- the 7.2% antimony/zinc oxide/Nafion® dispersion was filtered through 0.45 ⁇ m HV filter for spin-coating at a speed of 1,8000 rpm for 60 seconds on glass/ITO backlight substrates (30 mm ⁇ 30 mm) and baked at 130° C. in air for 15 minutes.
- the baked zinc-antimony oxide/Nafion® films had thickness of 35 mm.
- the remaining fabrication of the devices was carried out in the same manner as described in Comparative Example 2.
- the device had current efficiency 11 Ed/A from above zero to 10,0000 nits.
- This example clearly shows that addition of Nafion® to antimony-zinc oxide dispersion in methanol enhanced its work-function and light emitting device performance as buffer layer.
Abstract
-
- where j≧0, k≧0 and 4≦(j+k)≦199,
- Q1 and Q2 are F or H,
- Rf 2 is F or a perfluoroalkyl radical having 1-10 carbon atoms either unsubstituted or substituted by one or more ether oxygen atoms,
- h=0 or 1, i=0 to 3, g=0 or 1,
wherein the buffer composition has a work-function greater than 5.0 eV. In some embodiments, the H on the SO3 may be replaced by either Li, Na, or K.
Description
-
- R1 is independently selected so as to be the same or different at each occurrence and is selected from hydrogen, alkyl, alkenyl, alkoxy, alkanoyl, alkylthio, aryloxy, alkylthioalkyl, alkylaryl, arylalkyl, amino, alkylamino, dialkylamino, aryl, alkylsulfinyl, alkoxyalkyl, alkylsulfonyl, arylthio, arylsulfinyl, alkoxycarbonyl, arylsulfonyl, acrylic acid, phosphoric acid, phosphonic acid, halogen, nitro, cyano, hydroxyl, epoxy, silane, siloxane, alcohol, benzyl, carboxylate, ether, ether carboxylate, amidosulfonate, ether sulfonate, ester sulfonate, and urethane; or both R1 groups together may form an alkylene or alkenylene chain completes a 3, 4, 5, 6 or 7-membered aromatic or alicyclic ring, which ring may Optionally include one or more divalent nitrogen, sulfur or oxygen atoms.
“alcohol” | —R3—OH | ||
“amido” | —R3—C(O)N(R6) R6 | ||
“amidosulfonate” | —R3—C(O)N(R6) R4—SO3Z | ||
“benzyl” | —CH2—C6H5 | ||
“carboxylate” | —R3—C(O)O—Z or —R3—O—C(O)—Z | ||
“ether” | —R3—(O—R5)p—O—R5 | ||
“ether carboxylate” | —R3—O—R4—C(O)O—Z or | ||
—R3—O—R4—O—C(O)—Z | |||
“ether sulfonate” | —R3—O—R4—SO3Z | ||
“ester sulfonate” | —R3—O—C(O)—R4—SO3Z | ||
“sulfonimide” | —R3—SO2—NH—SO2—R5 | ||
“urethane” | —R3—O—C(O)—N(R6)2 | ||
where all “R” groups are the same or different at each occurrence and:
-
- R3 is a single bond or an alkylene group
- R4 is an alkylene group
- R5 is an alkyl group
- R6 is hydrogen or an alkyl group
- p is 0 or all integer from I to 20
- Z is H, alkali metal, alkaline earth metal, N(R5)4 or R5
Any of the above groups may further be unsubstituted or substituted, and any group may have F substituted for one or more hydrogens, including perfluorinated groups. In one embodiment, the alkyl and alkylene groups have from 1-20 carbon atoms.
-
- R7 is the same or different at each occurrence and is Selected from hydrogen, alkyl, heteroalkyl, alkenyl, heteroalkenyl, Alcohol, amidosulfonate, benzyl, carboxylate, ether, ether carboxylate, ether sulfonate, ester sulfonate and urethane, with the proviso that at least one R7 is not hydrogen, and
- m is 2 or 3.
-
- R1 is independently selected so as to be the same or different at each occurrence and is selected from hydrogen, alkyl, alkenyl, alkoxy, alkanoyl, alkythio, aryloxy, alkylthioalkyl, alkylaryl, arylalkyl, amino, alkylamino, dialkylamino, aryl, alkylsulfinyl, alkoxyalkyl, alkylsulfonyl, arylthio, arylsulfinyl, alkoxycarbonyl, arylsulfonyl, acrylic acid, phosphoric acid, phosphonic acid, halogen, nitro, cyano, hydroxyl, epoxy, silane, siloxane, alcohol, benzyl, carboxylate, ether, amidosulfonate, ether carboxylate, ether sulfonate, ester sulfonate, and urethane; or both R1 groups together may form an alkylene or alkenylene chain completing a 3, 4, 5, 6, or 7-membered aromatic or alicyclic ring, which ring may Optionally include one or more divalent nitrogen, sulfur or oxygen atoms; and
- R2 is independently selected so as to be the same or different at each occurrence and is selected from hydrogen, alkyl, alkenyl, aryl, alkanoyl, alkylthioalkyl, alkylaryl, arylalkyl, amino, epoxy, silane, siloxane, alcohol, benzyl, carboxylate, ether, ether carboxylate, ether sulfonate, ester sulfonate, and urethane.
-
- a is 0 or an integer from 1 to 4;
- b is an integer from 1 to 5, with the proviso that a+b=5; and R1 is independently selected so as to be the same or different at each occurrence and is selected from hydrogen, alkyl, alkenyl, alkoxy, alkanoyl, alkythio, aryloxy, alkylthioalkyl, alkylaryl, arylalkyl, amino, alkylamino, dialkylamino, aryl, alkylsulfinyl, alkoxyalkyl, alkylsulfonyl, arylthio, arylsulfinyl, alkoxycarbonyl, arylsulfonyl, acrylic acid, phosphoric acid, phosphonic acid, halogen, nitro, cyano, hydroxyl, epoxy, silane, siloxane, alcohol, benzyl, carboxylate, ether, ether carboxylate, amidosulfonate, ether sulfonate, ester sulfonate, and urethane; or both R1 groups together may form an alkylene or alkenylene chain completing a 3, 4, 5, 6, or 7-membered aromatic or alicyclic ring, which ring may optionally include one or more dilvanet nitrogen, sulfur or oxygen atoms.
-
- Q is S, Se, Te, or NR6;
- R6 is hydrogen or alkyl;
- R8, R9, R10, and R11 are independently selected so as to be the same or different at each occurrence and are selected from hydrogen, alkyl, alkenyl, alkoxy, alkanoyl, alkylthio, aryloxy, alkylthioalkyl, alkylaryl, arylalkyl, amino, alkylamino, dialkylamino, aryl, alkylsulfinyl, alkoxyalkyl, alkylsulfonyl, arylthio, arylsulfinyl, alkoxycarbonyl, arylsulfonyl, acrylic acid, phosphoric acid, phosphonic acid, halogen, nitro, nitrile, cyano, hydroxyl, epoxy, silane, siloxane, alcohol, benzyl, carboxylate, ether, ether carboxylate, amidosulfonate, ether sulfonate, ester sulfonate, and methane; and
- at least one of R8 and R9, R9 and R10, and R10 and R11 together form an alkenylene chain completing a 5 or 6-membered aromatic ring, which ring may optionally Include one or more divalent nitrogen, sulfur or oxygen atoms.
-
- Q is S, Se, Te, or NH; and
- T is the same or different at each occurrence and is selected from S, NR6, O, SiR6 3, Se, Te, and PR6;
- R6 is hydrogen or alkyl.
The fused polycyclic heteroaromatic monomers may be substituted with groups selected from alkyl, heteroalkyl, alcohol, benzyl, carboxylate, ether, ether carboxylate, ether sulfonate, ester sulfonate, and urethane. In one embodiment, the substituent groups are fluorinated. In one embodiment, the substituent groups are fully fluorinated.
-
- Q is S, Se, Te, or NR6;
- T is selected from S, NR6, O, SiR6 2, Se, Te, and PR6;
- E is selected from alkenylene, arylene, and heteroarylene;
- R6 is hydrogen or alkyl;
- R12 is the same or different at each occurrence, and is selected from hydrogen, alkyl, alkenyl, alkoxy, alkanoyl, alkythio, aryloxy, alkylthioalkyl, alkylaryl, arylalkyl, amino, alkylamino, dialkylamino, aryl, alkylsulfinyl, alkoxyalkyl, alkylsulfonyl, arylthio, arylsulfinyl, alkoxycarbonyl, arylsulfonyl, acrylic acid, phosphoric acid, phosphonic acid, halogen, nitro, nitrile, cyano, hydroxyl, epoxy, silane, siloxane, alcohol, benzyl, carboxylate, ether, ether carboxylate, amidosulfonate, ether sulfonate, ester sulfonate, and urethane; or both R12 groups together may form an alkylene or alkenylene chain completing a 3, 4, 5, 6, or 7-membered aromatic or alicyclic ring, which ring may optionally include one or more divalent nitrogen, sulfur or oxygen atoms.
-
- b is an integer from 1 to 5,
- R13 is OH or NHR14, and
- R14 is alkyl, fluoroalkyl, sulfonylalkyl, or sulfonylfluoroalkyl.
-
- W is selected from (CF2)q, O(CF2)q, S(CF2)q, (CF2)qO (CF2)r, and SO2(CF2)q,
- b is independently an integer from 1 to 5,
- R13 is OH or NHR14, and
- R14 is alkyl, fluoroalkyl, sulfonylalkyl, or sulfonylfluoroalkyl.
In one embodiment, the monomer containing W equal to S(CF2)q is polymerized then oxidized to give the polymer containing W equal to SO2(CF2)q. In one embodiment, the polymer containing R13 equal to F is converted its acid form where R13 is equal to OH or NHR14.
-
- Rf is selected from fluorinated alkylene, fluorinated heteroalkylene, fluorinated arylene, or fluorinated heteroarylene;
- Rg is selected from fluorinated alkylene, fluorinated heteroalkylene, fluorinated arylene, fluorinated heteroarylene, arylene, or heteroarylene; and
- n is at least 4.
In one embodiment of Formula IX, Rf and Rg are perfluoroalkylene groups. In one embodiment, Rf and Rg are perfluorobutylene groups. In one embodiment, Rf and Rg contain ether oxygens. In one embodiment, n is greater than 20.
-
- Rg is selected from fluorinated alkylene, fluorinated heteroalkylene, fluorinated arylene, fluorinated heteroarylene, arylene, or heteroarylene;
- R15 is a fluorinated alkylene group or a fluorinated heteroalkylene group;
- R16 is a fluorinated alkyl or a fluorinated aryl group; and
- p is 0 or an integer from 1 to 4.
-
- R16 is a fluorinated alkyl or a fluorinated aryl group;
- a, b, c, d, and e are each independently 0 or an integer from 1 to 4; and
- n is at least 4.
-
- R17 to R20 are independently H, halogen, alkyl or alkoxy of 1 to 10 carbon atoms, Y, C(Rf 1)(Rf 1)OR21, R4Y or OR4Y;
- Y is COE2, SO2 E2, or sulfonimide;
- R21 is hydrogen or an acid-labile protecting group;
- Rf 1 is the same or different at each occurrence and is a fluoroalkyl group of 1 to 10 carbon atoms, or taken together are (CF2)e where e is 2 to 10;
- R4 is an alkylene group;
- E2 is OH, halogen, or OR7; and
- R5 is an alkyl group;
- with the proviso that at least one of R17 to R20 is Y, R4Y or OR4Y.
R4, R5, and R17 to R20 may optionally be substituted by halogen or ether oxygen.
wherein R21 is a group capable of forming or rearranging to a tertiary cation, more typically an alkyl group of 1 to 20 carbon atoms, and most typically t-butyl.
—OaSi(OH)b-aR22 3-bR23RjSO3H
wherein:
-
- Rf is a perfluoralkylene radical, which may be substituted by one or more ether oxygen atoms.
In one embodiment, the non-wettable FAP having pendant siloxane groups has a fluorinated backbone. In one embodiment, the backbone is perfluorinated.
- Rf is a perfluoralkylene radical, which may be substituted by one or more ether oxygen atoms.
wherein Rf 2 is F or a perfluoroalkyl radical having 1-10 carbon atoms either unsubstituted or substituted by one or more ether oxygen atoms, h=0 or 1, i=0 to 3, and g=0 or 1.
where j≧0, k≧0, and 4≦(j+k)≦199, Q1 and Q2 are F or H, Rf 2 is F or a perfluoroalkyl radical having 1-10 carbon atoms either unsubstituted or substituted by one or more ether oxygen atoms, h=0 or 1, i=0 to 3, g=0 or 1, and E4 is H or an alkali metal. In one embodiment Rf 2 is—CF3, g=1, h=1, and i=1. In one embodiment the pendant group is present at a concentration of 3-10 mol-%.
—(O—CF2CFRf 3)a—O—CF2CFRf 3SO3E5
wherein Rf 3 and Rf 4 are independently selected from F, Cl, or A perfluorinated alkyl group having 1 to 10 carbon atoms, a=0, 1 or 2, and E5 is H, Li, Na, K or N(R1)(R2)(R3)(R4) and R1, R2, R3, and R4 are the same or different and are and in one embodiment H, CH3 or C2H5. In another embodiment E5 is H. As stated above, E5 may also be multivalent.
—O—CF2CF(CF3)—O—CF2CF2SO3E5
where X is as defined above. FSA polymers of this type are disclosed in U.S. Pat. No. 3,282,875 and can be made by copolymerization of tetrafluoroethylene (TFE) and the perfluorinated vinyl ether CF2═CF—O—CF2CF(CF3)—O— CF2CF2SO2F, perfluoro(3,6-dioxa-4-methyl-7-octenesulfonyl fluoride) (PDMOF), followed by conversion to sulfonate groups by hydrolysis of the sulfonyl fluoride groups and ion exchanged as necessary to convert them to the desired ionic form. An example of a polymer of the type disclosed in U.S. Pat. Nos. 4,358,545 and 4,940,525 has the side chain —O—CF2CF2SO3E5, wherein E5 is as defined above. This polymer can be made by copolymerization of tetrafluoroethylene (TFE) and the perfluorinated vinyl ether CF2═CF—O—CF2CF2SO2F, perfluoro(3-oxa-4-pentenesulfonyl fluoride) (POPF), followed by hydrolysis and further ion exchange as necessary.
-
- (a) providing an aqueous solution or dispersion of a FAP;
- (b) adding an oxidizer to the solutions or dispersion of step (a); and
- (c) adding at least one precursor monomer to the mixture of step (b).
TABLE 1 |
Effect of acid (Nafion ®) equivalent/1 gram-oxide |
on work-function (Wf) |
Acid equivalent/1 g | ||
oxide | CPD (volt) | Wf (eV, ref. To Au) |
0 | 0.87 | 4.91 |
1 × 10−4 | 1.02 | 5.06 |
2.6 × 10−4 | 1.37 | 5.41 |
5.6 × 10−4 | 1.60 | 5.64 |
7.2 × 10−4 | 1.77 | 5.81 |
2.5 × 10−3 | 1.99 | 6.03 |
TABLE 2 |
Effect of acid [poly(VF2/PSEBVE)] equivalent/ |
gram-oxide on work-function |
Acid equivalent/1 g oxide | CPD | Wf (eV, ref. To Au) |
0 | 0.87 | 4.91 |
1.0 × 10−4 | 1.29 | 5.34 |
2.5 × 10−4 | 1.56 | 5.61 |
5.0 × 10−4 | 1.79 | 5.84 |
1.0 × 10−3 | 1.98 | 6.06 |
1.7 × 10−3 | 2.06 | 6.13 |
TABLE 3 |
Effect of acid (5 × 10−4 acid equivalent/1 gram-oxide on work-function |
CPD vs. Kelvin | Work-function | |
Acid | Probe Tip | (eV; ref. To Au) |
None (Zinc antimonate) | 0.87 | 4.91 |
Poly(E/PSEPVE) | 1.51 | 5.64 |
Poly(NBD/TFE-PSEPVE) | 1.42 | 5.54 |
TABLE 4 |
Effect of Nafion ® on work-function of zinc/antimony double oxide |
CPD vs. Kelvin | Work-function | |
Acid | Probe Tip | (eV; ref. To Au) |
None (Zinc antimonate) | 0.549 | 4.63 |
Nafion ® added | 1.282 | 5.37 |
(pH 0.4 dispersion) | ||
Nafion ® added first, NH4OH | 1.293 | 5.38 |
second (pH 7.8 dispersion) | ||
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EP1897097A2 (en) | 2008-03-12 |
CN101595532B (en) | 2013-07-31 |
US7700008B2 (en) | 2010-04-20 |
WO2007002740A3 (en) | 2009-04-16 |
EP1897097A4 (en) | 2011-06-29 |
US20060289843A1 (en) | 2006-12-28 |
JP2009502025A (en) | 2009-01-22 |
JP5404036B2 (en) | 2014-01-29 |
CN101595532A (en) | 2009-12-02 |
WO2007002740A2 (en) | 2007-01-04 |
KR101279209B1 (en) | 2013-06-28 |
KR20080039884A (en) | 2008-05-07 |
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