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1. (WO1979000813) SHALLOW-HOMOJUNCTION SOLAR CELLS

Pub. No.:    WO/1979/000813    International Application No.:    PCT/US1979/000181
Publication Date: Oct 18, 1979 International Filing Date: Mar 21, 1979
IPC: H01L 31/068
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Inventors:
Title: SHALLOW-HOMOJUNCTION SOLAR CELLS
Abstract:
Improvements in shallow-homojunction solar cells based upon a plurality of layers of a direct gap semi conductor material such as GaAs, as well as their fabrication, are disclosed. The shallow-homojunction solar cells have a n+/p/p+ structure (26, 24, 22) in which the n+ top layer (26) is limited to a thickness which permits significant carrier generation to occur in a lower semiconductor layer (24). An antireflection coating (28) is applied over the n+ top layer (26), and a particularly preferred method for applying the antireflection coating is by anodization. These solar cells can be grown on relatively inexpensive substrates, if desired, such as silicon or germanium.