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DOI	10.1016/j.scib.2020.01.025
	Curing the fundamental issue of impurity phases in two-step solution-processed CsPbBr3 perovskite films
	Feng J.; Han X.; Huang H.; Meng Q.; Zhu Z.; Yu T.; Li Z.; Zou Z.
发表日期	2020
ISSN	20959273
起始页码	726
结束页码	737
卷号	65 期号:9
英文摘要	Inorganic lead halide perovskite CsPbBr3 offers attractive photophysical properties and phase stability for high-performance optoelectronic devices. However, CsPbBr3 films produced by the classic solution-based two-step method are always accompanied with impurity phases of CsPb2Br5 and Cs4PbBr6, which represents a major efficiency-limiting factor for future advances of CsPbBr3-based devices. The challenge lies in the complexity of the Cs-Pb-Br phase system, requiring both spatially and temporally precise control of the precursor stoichiometry during solution-phase growth of CsPbBr3 films. By adopting 2-methoxyethanol as the solution conversion medium instead of commonly applied methanol, the reaction between CsBr and PbBr2 can be finely controlled to yield single phase CsPbBr3 films within a few minutes; extending the solution-conversion step to 24 h does not alter the phase purity of resulting CsPbBr3 films. The present work paves the way to regulate the crystal growth behaviors of two-step solution-processed CsPbBr3 films by simple solvent engineering. © 2020 Science China Press
关键词	CsPbBr3 film Inorganic perovskite Phase purity Solvent engineering Two-step method
英文关键词	Bromine compounds; Cesium compounds; Crystal impurities; Optoelectronic devices; Perovskite; 2-Methoxyethanol; Crystal growth behavior; Halide perovskites; Phase purity; Photophysical properties; Solution-processed; Solvent engineering; Two step method; Lead compounds
语种	英语
来源期刊	Science Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207034
作者单位	Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing, 210093, China; School of Physics, Nanjing University, Nanjing, 210093, China
推荐引用方式 GB/T 7714	Feng J.,Han X.,Huang H.,et al. Curing the fundamental issue of impurity phases in two-step solution-processed CsPbBr3 perovskite films[J],2020,65(9).
APA	Feng J..,Han X..,Huang H..,Meng Q..,Zhu Z..,...&Zou Z..(2020).Curing the fundamental issue of impurity phases in two-step solution-processed CsPbBr3 perovskite films.Science Bulletin,65(9).
MLA	Feng J.,et al."Curing the fundamental issue of impurity phases in two-step solution-processed CsPbBr3 perovskite films".Science Bulletin 65.9(2020).