https://doi.org/10.1140/epjs/s11734-025-01651-7
Regular Article
One-pot room-temperature synthesis of CsPbBr3/SiO2 nanocrystals with improved stability for white light-emitting diodes
1
Hubei Key Laboratory of Energy Storage and Power Battery, School of Optoelectronic Engineering, School of New Energy, Hubei University of Automotive Technology, 442002, Shiyan, People’s Republic of China
2
School of Physics and Electronic Information, Jiangsu Second Normal University, 211200, Nanjing, China
3
Beijing Tianhe Xinjin Hui Agricultural Technology Co., Ltd., Beijing, China
4
Engineering Research Center for Nanophotonics and Advanced Instrument of Ministry of Education, Key Laboratory of Polar Materials and Devices of Ministry of Education, School of Physics and Electronic Science, East China Normal University, Shanghai, China
a
y.zhang@huat.edu.cn
b
cbjing@ee.ecnu.edu.cn
Received:
8
March
2025
Accepted:
24
April
2025
Published online:
15
May
2025
The susceptibility to optical instability of perovskite nanocrystals (NCs) under ambient conditions is a serious hindrance for practical applications. The conventional SiO2 coating method for enhancing stability suffered from long reaction times and complicated preparation procedures. In this study, a facile and convenient room-temperature one-pot approach was developed to fabricate CsPbBr3/SiO2 NCs, which involves the addition of tetramethoxysilane (TMOS) in advance. Owing to surface passivation, the PLQY of the CsPbBr3/SiO2 NCs increased to 90% from 70% of the primitive CsPbBr3 NCs. The SiO2 layer formed by the TMOS hydrolysis and condensation reactions also protect the CsPbBr3 NCs from external environment stimuli. Compared with the pristine CsPbBr3 NCs, the air stability, structural stability, polar solvent resistance, thermal stability, and UV resistance stability of the CsPbBr3/SiO2 NCs are markedly enhanced. Also, the CsPbBr3/SiO2 NCs can be used as green phosphors for white light-emitting diode (WLED), which exhibits a luminous efficiency of 40 lm/W.
Supplementary Information The online version contains supplementary material available at https://doi.org/10.1140/epjs/s11734-025-01651-7.
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Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
