[11a-N204-1~10] 13.9 Compound solar cells

[11a-N204-1] [Young Scientist Presentation Award Speech] Efficiency Improvement of Narrow-Gap III - V Semiconductor Solar Cells and Quantitative Evaluation of Electroluminescence

〇Riko Yokota¹, Kentaroh Watanabe², Hassanet Sodabanlu², Meita Asami¹, Hao Xu², Yoshiaki Nakano¹, Masakazu Sugiyama^1,2 (1.UTokyo, 2.RCAST)

Keywords:electroluminescence, rear-hetero junction, narrow gap

The open circuit voltage (V_OC) of solar cells can be evaluated by measuring the intensity of the electroluminescence (EL) and obtaining the external radiative efficiency (η_ext).We fabricated InGaAs rear-hetero junction solar cells and realized high V_OC and η_ext of V_OC = 0.428 V, η_ext = 8.73%. In this presentation, we will present about the fabrication and evaluation of aformentioned InGaAs solar cells and of InGaAsP solar cells.