Methods of making pn CdTe/CdS thin film solar cells

Details Methods of making pn CdTe/CdS thin film solar cells Methods of making pn CdTe/CdS thin film solar cells

1992-09-28

1994-04-19

Weisstuch, Aaron

Fishing, trapping, and vermin destroying

136260, 136264, 437102, 437234, 427 76, H01L 3118, H01L 31072

Patent

active

053044991

ABSTRACT:
A method of making pn CdTe/CdS thin film solar cells, in which a transparent TCO layer is deposited as a front contact on a transparent substrate in the form of inexpensive soda-lime glass, and is preferably provided with an ultra-thin indium layer, which is in turn coated with the CdS layer, wherein the thus coated substrate is brought to the CdTe coating at a temperature between 480.degree. C. and 520.degree. C., which is maintained during the ensuing rapid CdTe deposition using the close-spaced sublimation method with a preferred rate of deposition of 5 to 15 .mu.m/min in an inert atmosphere. The indium layer dissolves during this deposition and effects the necessary n-doping of the CdS layer, without an additional method step. Solar cells can be made in this way with high efficiency in an inexpensive method, suitable for mass production.

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