In a photovoltaic cell, an i-type amorphous silicon film and an n-type amorphous silicon film are formed in a region excluding a predetermined width of an outer periphery on a main surface of an n-type single crystalline silicon substrate. A front electrode is formed so as to cover the i-type amorphous...http://www.google.com.au/patents/US7781669?utm_source=gb-gplus-sharePatent US7781669 - Photovoltaic cell
