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

1984-06-25

1985-10-15

Weisstuch, Aaron

Batteries: thermoelectric and photoelectric

Photoelectric

Panel or array

136255, 136258, 357 30, 29572, 427 74, H01L 3106

Patent

active

045476217

ABSTRACT:
An improved photovoltaic device characterized by long term stability in its photoconversion ability. The device is adapted to absorb incident light throughout a substantial portion of the bulk of the photoactive region thereof in a substantially uniform manner. Said uniform absorption of light is provided by grading the band gap of at least a portion of the semiconductor material of the photoactive region thereof such that the graded portions most proximate the light incident surface of the photovoltaic device have a wider band gap than do those portions more distal from the light incident surface. The band gap gradation may be smooth or stepped, and may be accomplished by compositional variation of the semiconductor materials forming the photoactive region. A method for fabricating the stable photovoltaic device of the instant invention is also provided.

REFERENCES:
patent: 4206002 (1980-06-01), Sabnis et al.
patent: 4377723 (1983-03-01), Dalal
patent: 4379943 (1983-04-01), Yang et al.
patent: 4471155 (1984-09-01), Mohr et al.

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