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Wavelength-Tunable and Water-Stable Cesium–Lead-Based All-Bromide Nanocrystal–Polymer Composite Films Using Ultraviolet-Curable Prepolymer as an Anti-Solvent

Title
Wavelength-Tunable and Water-Stable Cesium–Lead-Based All-Bromide Nanocrystal–Polymer Composite Films Using Ultraviolet-Curable Prepolymer as an Anti-Solvent
Author(s)
Kim, Wook. Hyun.Bae, JungyounKim, Kang-PilWoo, Sung-Ho
DGIST Authors
Kim, Wook. Hyun.Bae, JungyounKim, Kang-PilWoo, Sung-Ho
Issued Date
2022-02
Type
Article
Author Keywords
cesium halide perovskite nanocrystalsblue emissionCsPbBr3Cs4PbBr6UV-curable prepolymeranti-solventreprecipitation
Keywords
HALIDE PEROVSKITE NANOCRYSTALSHIGH-STABILITYQUANTUM DOTSCSPBX3BLUESILICAGREEN
ISSN
2073-4360
Abstract
All-inorganic metal halide perovskite nanocrystals (IPeNCs) have become one of the most promising luminescent materials for next-generation display and lighting technology owing to their excellent color expression ability. However, research on IPeNCs with stable blue emission is limited. In this paper, we report stable blue emissive all-bromide IPeNCs obtained through a modified ligand-assisted reprecipitation method using an ultraviolet (UV)-curable prepolymer as the anti-solvent at a low temperature. We found that the blue emission originates from quantum-confined CsPbBr3 nanoparticles formed together with the colorless wide-bandgap Cs4PbBr6 nanocrystals. When the temperature of the prepolymer was increased from 0 to 50 °C, CsPbBr3 nanoparticles became larger and more crystalline, thereby altering their emission color from blue to green. The synthesized all-bromide blue-emitting IPeNC solution remained stable for over 1 h. It also remained stable when it was mixed with the green-emitting IPeNC solution. By simply exposing the as-synthesized IPeNC–prepolymer solutions to UV light, we formed water-stable composite films that emitted red, green, blue, and white colors. We believe that this synthetic method can be used to develop color-emitting composite materials that are highly suitable for application as the color conversion films of full-color liquid crystal display backlight systems and lighting applications. © 2022 by the authors. Licensee MDPI, Basel, Switzerland.
URI
http://hdl.handle.net/20.500.11750/16812
DOI
10.3390/polym14030381
Publisher
MDPI AG
Related Researcher
Files in This Item:
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000756381400001.pdf

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Appears in Collections:
Division of Energy Technology 1. Journal Articles

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