Thin-Film Transformation of NH₄PbI₃ to CH₃NH₃PbI₃ Perovskite: A Methylamine-Induced Conversion-Healing Process

详细信息    查看全文

• 作者：Yingxia Zong ; Dr. Yuanyuan Zhou ; Dr. Minggang Ju ; Dr. Hector F. Garces ; Dr. Amanda R. Krause ; Fuxiang Ji ; Dr. Guanglei Cui ; Prof. Xiao Cheng Zeng ; Prof. Nitin P. Padture and Dr. Shuping Pang
• 刊名：Angewandte Chemie International Edition
• 出版年：2016
• 出版时间：November 14, 2016
• 年：2016
• 卷：55
• 期：47
• 页码：14723-14727
• 全文大小：4275K
• ISSN：1521-3773

文摘

Methylamine-induced thin-film transformation at room-temperature is discovered, where a porous, rough, polycrystalline NH₄PbI₃ non-perovskite thin film converts stepwise into a dense, ultrasmooth, textured CH₃NH₃PbI₃ perovskite thin film. Owing to the beneficial phase/structural development of the thin film, its photovoltaic properties undergo dramatic enhancement during this NH₄PbI₃-to-CH₃NH₃PbI₃ transformation process. The chemical origins of this transformation are studied at various length scales.