[19a-432-1~12] 12.5 Organic solar cells

[19a-432-11] Investigation of stable structure in perovskite / oxide interface

〇(M2)Jun Yamasaki¹, Kumiko Yamamoto¹, Satoshi Iikubo^1,2, Syuji Hayase^1,2 (1.Kyushu Inst. Tech., 2.JST-MIRAI)

Keywords:perovskite solar cell, first-principles calculation, structure stability

CH₃NH₃SnI₃ attracts much attention as a possible candidate for Pb-free perovskite solar cell. However, there is serious problem which is the reduction of photoelectric conversion efficiency due to the charge recombination at the perovskite/oxide (TiO₂) interface. We have studied structural stability including impurity elements from the oxide layer. We will discuss about a microscopic mechanism of elements dependence of the structural stability using first-principles calculation.