[24p-E206-1~12] 12.5 Organic solar cells

△ [24p-E206-2] Direct Observation of Charge Transfer in PEA-Containing Tin Perovskite Solar Cells by Electron Spin Resonance

〇Atsushi Sato¹, Seira Yamaguchi¹, Mayu Motohashi¹, Yihuang Wang¹, Tomoya Nakamura², Atsushi Wakamiya², Kazuhiro Marumoto^1,3 (1.Univ. of Tsukuba, 2.Kyoto Univ., 3.TREMS, Univ. of Tsukuba)

Keywords:perovskite, solar cell, charge transfer

Although tin perovskite solar cells are most promising lead-free perovskite solar cells, their power conversion efficiency is still around 14%. Recently, perovskites which contain phenylethylammonium (PEA) as A-site cations attract attentions due to high stability even in ambient condition. In this study, we directly observe charge transfer between PEDOT:PSS/perovskite interface for layered films and solar cell device and clarify operation mechanism and degradation process of the device from a microscopic viewpoint.