期刊
CRYSTAL GROWTH & DESIGN
卷 20, 期 7, 页码 4366-4374出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.cgd.0c00122
关键词
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资金
- Yotam project of the Weizmann Institute's Sustainability and Energy Research Initiative, SAERI
We describe the growth of single crystals of the halide perovskites APbBr(3), with varying ratios of Cs to methylammonium (MA) on the A site, by antisolvent vapor-assisted crystallization (AVC) and characterize the structural and compositional homogeneity of the grown crystals. We find improved thermostability for the Cs-rich mixed crystals and suggest that this is caused by a combination of locking-in of the relatively large MA in the smaller lattice of the Cs-rich material as well as by stronger hydrogen bonding between the nitrogen of MA and Br due to reduced lattice size and/or octahedral tilting with increased Cs. We also show that it is possible to grow either compositionally homogeneous crystals or core-shell, compositionally graded crystals by changing the ratio of antisolvent to solvent in the AVC method.
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