期刊
NANOTECHNOLOGY
卷 28, 期 44, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1361-6528/aa892e
关键词
lead halide perovskite nanocrystals; water-resistant; stably luminescent; core-shell structure; coating
资金
- Fundamental Research Funds for the Central Universities (FRFCU) [2016JBM066]
- National Natural Science Foundation of China (NSFC) [61704007, 11474018]
- National Key Research and Development Program of China [2016YFB0401302]
Lead halide perovskite materials are thriving in optoelectronic applications due to their excellent properties, while their instability due to the fact that they are easily hydrolyzed is still a bottleneck for their potential application. In this work, water-resistant, monodispersed and stably luminescent cesium lead bromine perovskite nanocrystals coated with CsPb2Br5 were obtained using a modified non-stoichiometric solution-phase method. CsPb2Br5 2D layers were coated on the surface of CsPbBr3 nanocrystals and formed a core-shell-like structure in the synthetic processes. The stability of the luminescence of the CsPbBr3 nanocrystals in water and ethanol atmosphere was greatly enhanced by the photoluminescence-inactive CsPb2Br5 coating with a wide bandgap. The water-stable enhanced nanocrystals are suitable for long-term stable optoelectronic applications in the atmosphere.
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