Batteries: thermoelectric and photoelectric – Photoelectric – Cells
Patent
1992-02-20
1994-01-18
Weisstuch, Aaron
Batteries: thermoelectric and photoelectric
Photoelectric
Cells
136258, 257458, H01L 31075
Patent
active
052796817
ABSTRACT:
A photovoltaic device having a semiconductor body with a pin junction, with reduced time-dependent deterioration, high reliability and a high photoelectric conversion efficiency is disclosed.
An i-type semiconductor layer constituting the semiconductor body is composed of a layer having a region containing germanium and at least one region not containing germanium. The at least one region not containing germanium is provided at least at the side of a p-semiconductor layer. The maximum composition ratio of germanium in the region containing amorphous silicon and germanium is within a range from 20 to 70 at. %, and the composition ratio of germanium in the above-mentioned region containing amorphous silicon and germanium is zero at the side of an n-semiconductor layer and increases toward the side of the p-semiconductor layer, with the rate of increase being larger at the side of the n-semiconductor layer than at the side of p-semiconductor layer, and the composition ratio of germanium at the center of the i-layer thickness is at least equal to 75 at. % of the maximum composition ratio of germanium.
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Matsuda Koichi
Matsuyama Jinsho
Murakami Tsutomu
Okada Naoto
Yamashita Toshihiro
Canon Kabushiki Kaisha
Weisstuch Aaron
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