Photovoltaic device

Details Photovoltaic device Photovoltaic device

1987-08-13

1988-10-11

Weisstuch, Aaron

Batteries: thermoelectric and photoelectric

Photoelectric

Panel or array

136258, 357 30, H01L 3106

Patent

active

047768940

ABSTRACT:
A first photovoltaic device according to the present invention comprises a plurality of unit photovoltaic cells layered in optical series, each unit photovoltaic cell including an optically active layer made of amorphous silicon and two impurity doped layers of opposite conductivity types arranged at opposite sides of the optically active layer; wherein a first impurity doped layer of a first unit photovoltaic cell located at the contact interface with a second unit photovoltaic cell is made of a first amorphous silicon alloy of first conductivity type, having an optically forbidden band width wider than that of amorphous silicon, and a second impurity doped layer of said second photovoltaic cell located at said contact interface is made of a second amorphous silicon alloy, different from said first amorphous silicon alloy, of opposite conductivity type from said first conductivity type, having an optically forbidden band width wider than that of the amorphous silicon.
A second photovoltaic device according to the present invention further comprises an additional impurity doper layer of either of the two conductivity types and made of non-monocrystalline ailicon, interposed between said first and second impurity layers.

REFERENCES:
patent: 4271328 (1981-06-01), Hamakawa et al.
patent: 4385199 (1983-05-01), Hamakawa et al.
patent: 4388482 (1983-06-01), Hamakawa et al.
patent: 4476346 (1984-10-01), Tawada et al.
Tsuda, S. et al., "Light-Induced Instability of Amorphous Silicon Photovoltaic Cells", Solar Cells, 9 (1983), pp. 25-36.

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