[15a-A401-1~9] 12.5 Organic and hybrid solar cells

△ [15a-A401-8] Charge Transfer in PEA-Containing Sn Perovskite Solar Cells and Charge States in Electron Transporting Layer

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 cells, ICBA, electron spin resonance

The facile oxidation of Sn(II) and the energy level mismatch of electron transporting layer (ETL) are thought to hinder the improvement of power conversion efficiency of Sn perovskite solar cells. Recently, perovskites which include PEA in A-site and structures with ICBA as ETL are attracting attention. In this work, we studied charge transfer and charge states in layered films and solar cell devices from a microscopic viewpoint.