globalchange  > 气候变化与战略
DOI: 10.1016/j.scib.2020.01.025
论文题名:
Curing the fundamental issue of impurity phases in two-step solution-processed CsPbBr3 perovskite films
作者: Feng J.; Han X.; Huang H.; Meng Q.; Zhu Z.; Yu T.; Li Z.; Zou Z.
刊名: Science Bulletin
ISSN: 20959273
出版年: 2020
卷: 65, 期:9
起始页码: 726
结束页码: 737
语种: 英语
中文关键词: 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
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
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/169890
Appears in Collections:气候变化与战略

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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

Recommended Citation:
Feng J.,Han X.,Huang H.,et al. Curing the fundamental issue of impurity phases in two-step solution-processed CsPbBr3 perovskite films[J]. Science Bulletin,2020-01-01,65(9)
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