Improved Moisture Stability of 2D Hybrid Perovskite (HOOC–CH 2 –NH 3 ) 2 PbI 4 by Dehydration Condensation between Organic Components

作者：Qizhong Zhang, Jiangtao Zhao, Zhen-hong Xiao, Jingtian Zhou, Bin Hong, Zhenlin Luo, Jun Bao, Chen Gao · 发表于：ACS Applied Energy Materials · 年份：2018 · DOI：10.1021/acsaem.8b00199 · 被引用次数：15 · 研究领域：Perovskite Materials and Applications、Gas Sensing Nanomaterials and Sensors、Conducting polymers and applications

In this work, a one-step solution-processing approach was purposed and demonstrated for the dehydration condensation between the organic components of 2D hybrid perovskite (HOOC–CH 2 –NH 3 ) 2 PbI 4 (abbreviated as Gly 2 PbI 4 ). The novel product obtained after condensation (labeled as Gly 2 PbI 4 -DCC) shows greatly enhanced stability without any obvious degradation in the accelerated moisture-tolerance test. XPS reveals the strong covalent bonds formed between the adjacent −COOH and −NH 3 + terminal groups. XRD, SEM, TEM, and moisture-tolerance test results show that the change from noncovalent interactions to covalent interactions helps the 2D hybrid perovskite to resist the intrusion of moisture, as well as facilitates the growth of smooth and uniform films. This work sheds light on the moisture stability problem of organic–inorganic hybrid perovskites.