[17p-M_124-1~6] 12.5 Organic and hybrid solar cells

2:15 PM - 2:30 PM JST(5:15 AM - 5:30 AM UTC)

[17p-M_124-2] Microstructural changes induced by electron irradiation in Sn-based perovskites

〇Yusuke Shimada¹, Jiaxin Chen¹, Naomu Sekiguchi¹, Qing Wang¹, Satoshi Iikubo¹ (1.Kyushu Univ.)

Keywords:

organic inorganic hybrid perovskite,Low-dose electron microscopy

To evaluate the atomic structure of organic-inorganic hybrid perovskites, low-dose TEM observations were performed on a Sn-based perovskite, FASnI₃, to investigate electron-beam-induced structural changes. At an electron dose of 3.0 e Å^-2 under 120 kV, clear perovskite diffraction patterns were observed. With increasing electron dose, the diffraction peaks gradually broadened, and amorphization was observed at 38 e Å^-2. In particular, a marked decrease in superlattice reflections was detected, suggesting a degradation of crystallographic order and possible decomposition behavior induced by electron irradiation.