HIGH-ENERGY ELECTRON IRRADIATION OF HIGH-EFFICIENCY THIN-FILM GALLIUM ARSENIDE SOLAR CELLS
Murdock, Matthew G.
Michael, Sherif N.
Porter, Matthew A.
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The electrical power supplied to satellites will continue to be provided by solar cells for the foreseeable future and new technologies and better methods of production for these cells will continue to be developed. Additionally, the space environment within the Earth’s radiation belts and the effect of the radiation on solar cells within this environment is well documented. The effects of radiation on solar cells outside this environment with the use of an 8-MeV electron beam was investigated. Thin-film high-efficiency gallium arsenide test devices were characterized, and an analysis of the thin-film devices’ performance post-irradiation was conducted via illuminated DC current-voltage and external quantum efficiency measurements. The results of this analysis showed a drastic reduction in device short circuit current of over 95% by a total electron fluence of 1016 cm-2.
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