[11p-N322-1~15] 12.5 Organic solar cells

△ [11p-N322-8] How the Mixed A-Site Cations in Tin Iodide Perovskites Affect Their Charge Carrier Dynamics

〇Eita Nakanishi¹, Ryosuke Nishikubo¹, Atsushi Wakamiya², Akinori Saeki¹ (1.Osaka Univ., 2.Kyoto Univ.)

Keywords:perovskite, charge carrier dynamics, solar cell

Sn perovskite has been attracting attention as a lead-free next-generation solar cell, and it has been reported that its performance can be improved by mixing A-site cations. However, the reason for this has remained unclear. In this study, we report the device evaluation, microwave spectroscopy, and crystal structure evaluation of tin perovskites with three different mixtures of FA/GA/PEA cations. As a result, it was clarified that the crystal structure changes depending on the mixing ratio of A-site cations and that the electron mobility has a significant influence on the device performance.