期刊
OPTICAL MATERIALS EXPRESS
卷 12, 期 2, 页码 665-672出版社
Optica Publishing Group
DOI: 10.1364/OME.448204
关键词
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资金
- National Natural Science Foundation of China [11774187, U1902218]
- Natural Science Foundation of Tianjin City [19JCYBJC17600]
- 111 Project [B07013]
In this study, the luminous performance of CsPbBr3 powder is significantly improved using a simple mechanosynthesis strategy, making it a promising material for optoelectronic devices.
All-inorganic perovskites are promising alternatives to organic-inorganic hybrid halide perovskites in the field of optoelectronic materials. Optimizing the luminescent property of CsPbBr3 is very important to promote its application in optoelectronic devices, and thus a facilitative method to prepare a large number of efficient luminous samples is desirable. In this study, we effectively improve the luminous performance of CsPbBr3 powder by a simple mechanosynthesis strategy. The emission intensity of CsPbBr3 powder is improved by ca. 40 times and the PLQY of the powder sample exceeds 40%. It is disclosed that the defects of CsPbBr3 are passivated and the ratio of the non-radiation recombination is reduced. The formed Cs4PbBr6 during grinding has a zero-dimensional perovskite structure that can limit the migration of the carriers between the [PbBr6] octahedrons. Now CsPbBr3 can be used in powder form other than film or quantum dots. A UV-chip LED is fabricated by using the prepared phosphor, and the narrow-band emission property (FWHM is 22 nm) makes it more suitable for application in back-lighting systems. (C) 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
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