[5p-PA3-1~46] 12.5 Organic solar cells

[5p-PA3-19] Fine structure of CsPbI₂ dependent Cs_0.2FA_0.8PbI_xBr_3-x perovskite by two-step reaction

〇Takuya Miura¹, Kotaro Takahashi¹, Ryo Ishikawa¹, Keiji Ueno¹, Hajime Shirai¹ (1.Saitama Univ.)

Keywords:perovskite, two-step reaction, Organic solvent

So far, we reported the role of IPA in the synthesize of organic-inoragnic FAPbI_xBr_3-x perovskite by the two-step reaction of amorphous PbIBr film and FAIBr/IPA solution. The IPA promote the crsytallization of PbIBr and simultanelusly FAIBr diffuse into grain boundary and/or void in the PbIBr network. In this paper, we will present the solvent dependent fine structure of CsPbI₂ and its influence on the formation speed of FAPbI_xBr_3-x perovskite including the removal process of residual solvent DMF, TBP, CHP, and DMSO by IPA.