[13p-P9-1~38] 12.5 Organic solar cells

[13p-P9-32] Influence of hole transport layer in perovskite solar cells on the recovery of EL intensity

〇Chihiro Yamamoto¹, Katsunori Maeda¹, Joel Yamakawa¹, Tetsuya Kaneko¹, Tetsuhiro Katsumata², Yoshihito Kunugi¹, Masao Isomura¹ (1.Eng, Tokai Univ., 2.Sci,Tokai Univ.)

Keywords:perovskite solar cells, electro luminescence

We have investigated effects of hole transport layer (HTL) in lead halide perovskite solar cells on the recovery behavior of Electroluminescence (EL) intensity. We fabricated the CH₃NH₃PbI₃-based solar cells with HTL and without HTL. EL images of the cells under a constant voltage of 1 V were obtained. During the forward bias for 15 min, EL intensity of the cell with HTL gradually decreases, while without HTL quickly decreases. Then, EL intensity of the cell with HTL materially recovers quickly, meanwhile without HTL recovers slowly. The difference of recovery behavior of EL intensity between the cell with HTL and without HTL is probably due to difference of ion movement.