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Silica coating enhances the stability of inorganic perovskite nanocrystals for efficient and stable down-conversion in white light-emitting devices
Zhang, F.; Shi, Z. F.; Ma, Z. Z.; Li, Y.; Li, S.; Wu, D.; Xu, T. T.; Li, X. J.; Shan, C. X.; Du, G. T.
2018
Source PublicationNanoscale
ISSN2040-3364
Volume10Issue:43Pages:20131-20139
AbstractRecently, inorganic halide perovskite (CsPbX3, X = Cl, Br, I) quantum dots (QDs) have attracted tremendous research interests because of their great potential for application in the fields of low-cost light sources and displays. However, the unsatisfactory structural and chemical stabilities of such materials are the main obstacles hindering reliable device operation significantly. In this study, we successfully prepared CsPbBr3/silica QD composites through a simple sol-gel reaction by using tetramethoxysilane as a single molecule precursor. The as-prepared CsPbBr3/silica QD composites demonstrated substantially improved stability against heat, light, and environmental oxygen/moisture. Besides, a relatively narrower photoluminescence linewidth and higher quantum yield were achieved compared with that of fresh CsPbBr3 QDs. Furthermore, the CsPbBr3 QDs/silica composites were applied as color-converting layer curing on blue light-emitting diodes (LEDs) for white LED applications. Finally, a high power efficiency of 63.5 lm W-1 was obtained and the light emission could be efficiently sustained over 13 h without any decay in the continuous current mode, demonstrating remarkable operation stability than that reported previously. It can be anticipated that the excellent properties and facile processing technique used here will make perovskite QDs/silica composites attractive for applications in optoelectronics and industrial fields.
Keywordhighly luminescent diodes phosphors cspbx3 matrix br cl Chemistry Science & Technology - Other Topics Materials Science Physics
DOI10.1039/c8nr07022a
Indexed BySCI ; EI
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Document Type期刊论文
Identifierhttp://ir.ciomp.ac.cn/handle/181722/61150
Collection中国科学院长春光学精密机械与物理研究所
Recommended Citation
GB/T 7714
Zhang, F.,Shi, Z. F.,Ma, Z. Z.,et al. Silica coating enhances the stability of inorganic perovskite nanocrystals for efficient and stable down-conversion in white light-emitting devices[J]. Nanoscale,2018,10(43):20131-20139.
APA Zhang, F..,Shi, Z. F..,Ma, Z. Z..,Li, Y..,Li, S..,...&Du, G. T..(2018).Silica coating enhances the stability of inorganic perovskite nanocrystals for efficient and stable down-conversion in white light-emitting devices.Nanoscale,10(43),20131-20139.
MLA Zhang, F.,et al."Silica coating enhances the stability of inorganic perovskite nanocrystals for efficient and stable down-conversion in white light-emitting devices".Nanoscale 10.43(2018):20131-20139.
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