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Highly luminescent CsPbX3/PMMA (X=Br, I) composites with improved stability for full-color Micro-LED displays.
- Source :
-
Journal of Luminescence . May2024, Vol. 269, pN.PAG-N.PAG. 1p. - Publication Year :
- 2024
-
Abstract
- Inorganic metal halide perovskite quantum dots (PQDs) have recently emerged as promising candidates for color conversion materials in Micro-LED displays, due to their outstanding color purity, high absorption coefficient, tunable emission wavelength. However the inferior stability and undesirable photoluminescence quantum yield (PLQY) restrict their particle applications. Herein, CsPbX 3 /PMMA (X = Br, I) composites with improved stability and optical performance were successfully prepared by a general and mild in-situ polymerization strategy. The ester carbonyl (C O) group in MMA formed complexes with Pb2+, leading to the in-situ thermal polymerization of polymethyl methacrylate (PMMA) under the action of the initiator. The multifunctional PMMA can efficiently passivate halogen vacancies while acting as a barrier against the degradation caused by heat, water, and oxygen. As a result, the PLQYs and stability of PMMA-coated CsPbX 3 PQDs have been significantly improved. When implementing CsPbX 3 /PMMA/PDMS composites as color conversion layers in Micro-LEDs, they achieve an impressive color gamut of 127.23% with excellent stability. We believe our work will stimulate the exploration of perovskite/polymer composites for industrial Micro-LED applications. • A universal and effective strategy is developed to increase the optical properties and stability of metal halide quantum dots. • The PLQYs of PMMA-coated CsPbBr 3 and CsPbI 3 can be increased by 1.18 and 1.23 times, respectively. • The Micro-LED displays based on CsPbX 3 /PMMA composites not only have a wide color gamut of 127.23% NTSC, but also have excellent working stability. [ABSTRACT FROM AUTHOR]
- Subjects :
- *QUANTUM dots
*METAL halides
*OPTICAL properties
*ABSORPTION coefficients
*POLYMERS
Subjects
Details
- Language :
- English
- ISSN :
- 00222313
- Volume :
- 269
- Database :
- Academic Search Index
- Journal :
- Journal of Luminescence
- Publication Type :
- Academic Journal
- Accession number :
- 176069061
- Full Text :
- https://doi.org/10.1016/j.jlumin.2024.120508