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Report No.

Proton irradiation effects on amorphous silicon triple-junction solar cells

Sato, Shinichiro; Kevin, B.*; Oshima, Takeshi

Degradation behavior of a-Si/a-SiGe/a-SiGe triple-junction solar cells irradiated with various energy protons are investigated ${it in-situ}$. It is clarified that the degradation due to proton irradiation is scaled by a unit of displacement damaged dose and thus the proton-induced degradation is mainly caused by the displacement damage effect. The performance recoveries immediately after irradiation are also investigated and it is clarified that all the parameters recover significantly at room temperature. In particular, the remarkable recovery is observed in the short-circuit current. This is thought to be due to recovery of the carrier lifetime, which is based on annealing of radiation defects.



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