[20p-S011-1~8] 13.10 Compound solar cells

▲ [20p-S011-8] Analysis of subcell damage in proton irradiated triple-junction solar cells with time-resolved photoluminescence

〇(P)David Michael Tex¹, Toshiyuki Ihara¹, Tetsuya Nakamura², Mitsuru Imaizumi², Takeshi Ohshima³, Yoshihiko Kanemitsu¹ (1.ICR Kyoto Univ., 2.JAXA, 3.JAEA)

Keywords:Time-resolved photoluminescence,Multi-junction solar cell,Radiation damage

In this work, we measure photoluminescence decays from the top InGaP and middle GaAs subcell of triple-junction solar cells with different proton damage. The characteristic time constants are obtained from excitation power dependence and compared with the current-voltage curves of the total device. We explain how the time constants are related to the electrical properties of the subcell.