期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 56, 期 9, 页码 2390-2394出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201611794
关键词
crystal growth; ternary solvents; perovskites; surface chemistry; synthetic methods
资金
- National Natural Science Foundation of China [51472097, 5151101197, 91622117, 21501060]
- National Basic Research Program of China [2015CB932600]
- Program for HUST Interdisciplinary Innovation Team [2015ZDTD038]
- China Postdoctoral Science Foundation [2016M592327]
- Fundamental Research Funds for the Central University [30915012205, 30916015106]
Recent reports demonstrate that a two-dimensional (2D) structural characteristic can endow perovskites with both remarkable photoelectric conversion efficiency and high stability, but the synthesis of ultrathin 2D perovskites with large sizes by facile solution methods is still a challenge. Reported herein is the controlled growth of 2D (C4H9NH3)(2)PbBr4 perovskites by a chlorobenzene-dimethylformide-acetonitrile ternary solvent method. The critical factors, including solvent volume ratio, crystallization temperature, and solvent polarity on the growth dynamics were systematically studied. Under optimum reaction condition, 2D (C4H9NH3)(2)PbBr4 perovskites, with the largest lateral dimension of up to 40m and smallest thickness down to a few nanometers, were fabricated. Furthermore, various iodine doped 2D (C4H9NH3)(2)PbBrxI4-x perovskites were accessed to tune the optical properties rationally.
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