Analysis of the anomalous spectral response of InP solar cells induced by high fluence proton irradiation
- Toyota Technological Institute, 2-12 Hisakata, Tempaku, Nagoya 468 (Japan)
- Central Res. Laboratory, Japan Energy Corporation, 3-17-35 Niizo-Minami, Toda, Saitama 335 (Japan)
Proton irradiation damage of InP n{sup +}-p space solar cells has been examined over a wide range of energy (0.015{endash}10 MeV) and at high fluence ({approximately}10{sup 13} cm{sup {minus}2}). Although the usual red spectral response degradation of InP cells has been observed under lower fluence proton irradiation, radiation testing has revealed an anomalous spectral response in the blue part of the spectrum. We propose a model to explain this phenomenon by considering conductivity-type conversion from p-InP into n-InP in a defect-induced region, determined by the proton range, of the p-InP base layer due to high fluence proton irradiation. This is confirmed by measurements of conductivity-type conversion of p-InP crystals by high fluence ({ge}10{sup 16} cm{sup {minus}2}) 1 MeV electron irradiation. {copyright} {ital 1997 American Institute of Physics.}
- OSTI ID:
- 450218
- Journal Information:
- Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 3 Vol. 81; ISSN JAPIAU; ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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