Enhanced Structural Stability and Photo Responsiveness of CH3NH3SnI3 Perovskite via Pressure-Induced Amorphization and Recrystallization

cond-mat.mtrl-sci

/ Authors

Xujie Lü, Yonggang Wang, Constantinos C. Stoumpos, Qingyang Hu, Xiaofeng Guo, Haijie Chen, Liuxiang Yang, Jesse S. Smith, Wenge Yang, Yusheng Zhao

and 3 more authors

Hongwu Xu, Mercouri G. Kanatzidis, Quanxi Jia

/ Abstract

An organic-inorganic halide perovskite of CH3NH3SnI3 with significantly improved structural stability is obtained via pressure-induced amorphization and recrystallization. In situ high-pressure resistance measurements reveal an increased electrical conductivity by 300% in the pressure-treated perovskite. Photocurrent measurements also reveal a substantial enhancement in visible-light responsiveness. The mechanism underlying the enhanced properties is demonstrated to be associated with the improved structural stability.