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Report No.

Performance recovery of proton-irradiated III-V solar cells by current injection

Sato, Shinichiro; Miyamoto, Haruki; Oshima, Takeshi; Imaizumi, Mitsuru*; Morioka, Chiharu*; Kawano, Katsuyasu*; Ito, Hisayoshi

The performance recovery of III-V solar cells irradiated with protons by current injection was investigated. InGaP/GaAs/Ge triple-junction (3J) solar cells were irradiated with 50keV protons at 1$$times$$10$$^{12}$$ or 10MeV protons at 1$$times$$10$$^{10}$$ions/cm$$^{2}$$ at room temperature. Then, the recoveries of the electric (current-voltage: $$I$$-$$V$$) characteristics of these samples were investigated by forward current (minority carrier) injection. As a result, the open circuit voltage ($$V_{rm{oc}}$$) of these 3J solar cells was recovered although no significant change in their short circuit current ($$I_{rm{sc}}$$) was observed due to current injection. In addition, the samples irradiated with 50keV protons were recovered compared to the ones irradiated with 10MeV protons.



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