[18p-P4-1~48] 12.5 Organic solar cells

[18p-P4-11] Effect of substitution element at the perovskite / oxide interface

〇(M1)Jun Yamasaki¹, Kumiko Yamamoto¹, Satoshi Iikubo¹, Kazunari Tanaka¹, Shuzi Hayase¹ (1.Kyushu Inst. Tech.)

Keywords:perovskite solar cell, first-principles calculation, lead-free

Although CH₃NH₃SnI₃ attract much attention to develop Pb-free perovskite solar cell, there is serious problem for reduced photo-conversion efficiency. Several experimental results suggest that charge recombination around the defect at perovskite / oxide interface may play important role for the phenomenon. In this study, we have carried out first-principles calculation on the structure model include impurity elements belong to the oxide, and investigated the reason for reduced photo-conversion efficiency.