Stable photovoltaic devices and method of producing same

Details Stable photovoltaic devices and method of producing same Stable photovoltaic devices and method of producing same

H - Electricity

01

L

345/22

H01L 31/06 (2006.01) H01L 31/052 (2006.01) H01L 31/065 (2006.01) H01L 31/18 (2006.01)

Patent

CA 1262766

ABSTRACT An amorphous semiconductor photovoltaic device having improved long term efficiency stability. The improved stability is achieved by grading the band gap energy of a portion of the photo-responsive layer of the device. The widest band gap energy portion of the photo-responsive layer is disposed nearest the light-incident surface of the device. The band gap gradation may be smooth or stepped, and may be accomplished by varying the composition of the source materials during deposition of the photo-responsive layer.

484433

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