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

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• 作者：Xujie Lü ; Yonggang Wang ; Constantinos C. Stoumpos ; Qingyang Hu ; Xiaofeng Guo ; Haijie Chen ; Liuxiang Yang ; Jesse S. Smith ; Wenge Yang ; Yusheng Zhao ; Hongwu Xu ; Mercouri G. Kanatzidis and Quanxi Jia
• 刊名：Advanced Materials
• 出版年：2016
• 出版时间：October 19, 2016
• 年：2016
• 卷：28
• 期：39
• 页码：8663-8668
• 全文大小：771K
• ISSN：1521-4095

文摘

An organic–inorganic halide CH₃NH₃SnI₃ perovskite 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 shown to be associated with the pressure-induced structural modification.