Author(s): Qian, DD (Qian, Doudou); Hu, TG (Hu, Tiangui); Gao, JY (Gao, Jingyi); Du, HH (Du, Haihong); Wu, L (Wu, Li); Kong, YF (Kong, Yongfa); Zhang, Y (Zhang, Yi); Xu, JJ (Xu, Jingjun)

Source: OPTICAL MATERIALS EXPRESS Volume: 12 Issue: 2 Pages: 665-672 DOI: 10.1364/OME.448204 Published: FEB 1 2022

Abstract: 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

Accession Number: WOS:000750873400005

Author Identifiers:

Author Web of Science ResearcherID ORCID Number

Wu, Li E-4258-2010 0000-0001-9246-8118

ISSN: 2159-3930

Full Text: https://opg.optica.org/ome/fulltext.cfm?uri=ome-12-2-665&id=468660