期刊
CHEMNANOMAT
卷 3, 期 4, 页码 223-227出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cnma.201700006
关键词
binary capping agents; monocrystalline nanocrystals; morphology control; organolead iodide perovskite; solution-based synthesis
资金
- Research Foundation-Flanders (FWO) [G.0197.11, G.0962.13, G0B39.15]
- KU Leuven Research Fund [C14/15/053]
- Flemish government through long term structural funding Methusalem (CASAS2) [Meth/15/04]
- Hercules foundation [HER/11/14]
- Belgian Federal Science Policy Office [IAP-PH05]
- EC through the Marie Curie ITN project iSwitch [GA-642196]
- ERC project LIGHT [GA307523]
- European Research Council (ERC) [335078-COLOURATOMS]
- Flemish Fund for Scientific Research (FWO Vlaanderen)
Controlling the morphology of organolead halide perovskite crystals is crucial to a fundamental understanding of the materials and to tune their properties for device applications. Here, we report a facile solution-based method for morphology-controlled synthesis of rod-like and plate-like organolead halide perovskite nanocrystals using binary capping agents. The morphology control is likely due to an interplay between surface binding kinetics of the two capping agents at different crystal facets. By high-resolution scanning transmission electron microscopy, we show that the obtained nanocrystals are monocrystalline. Moreover, long photoluminescence decay times of the nanocrystals indicate long charge diffusion lengths and low trap/defect densities. Our results pave the way for large-scale solution synthesis of organolead halide perovskite nanocrystals with controlled morphology for future device applications.
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