Ultraviolet Light-Induced Degradation of Luminescence in Mn-Doped CsPbCl3 Nanocrystals

doi:10.1021/acs.jpcc.9b03294

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	Ultraviolet Light-Induced Degradation of Luminescence in Mn-Doped CsPbCl3 Nanocrystals
	Q.Y.Li; S.H.Ji; X.Yuan; J.Li; Y.Fan; J.H.Zhang; J.L.Zhao
	2019
发表期刊	Journal of Physical Chemistry C
ISSN	1932-7447
卷号	123 期号:23 页码:14849-14857
摘要	Improving the photostability of highly luminescent Mn2+ doped all-inorganic halide perovskite nanocrystals (NCs) is challenging because their excellent optical performances are determined by the stable structure and low defect/trap states. The optical properties of Mn2+ doped CsPbCl3 (Mn2+:CsPbCl3) NCs with various Mn2+ doping concentrations under ultraviolet (UV) illumination were studied to unravel their photodegradation by using photoluminescence (PL) spectroscopy at room temperature. The PL intensities of band-edge excitons and Mn2+ ions in the Mn2+:CsPbCl3 NC films significantly decreased due to formation of nonradiative defects/traps in NCs with increasing illumination times. It was surprisingly found that the single- and multiexponential decay times (1.81-1.15 ms) of Mn2+ emissions ranging from 595 to 640 nm observed in the doped NC films with low and high Mn/Pb ratios were almost not varied with increasing UV illumination times. However, the blue-shift of Mn2+ emission was observed in high Mn2+ doping concentration NCs under illumination, which might result from the diffusion of Mn2+ ions to the surface of doped NCs. Further, the surface passivation of Mn2+ :CsPbCl3 NCs by using a Cs4PbCl6 shell was found to effectively suppress the photodegradation of Mn2+:CsPbCl3 NCs and enhance the PL stability of Mn2+.
关键词	perovskite quantum dots,in-situ observation,energy-transfer,thermal-degradation,halide,emission,dynamics
DOI	10.1021/acs.jpcc.9b03294
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收录类别	SCI ; EI
语种	英语
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/63253
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	Q.Y.Li,S.H.Ji,X.Yuan,et al. Ultraviolet Light-Induced Degradation of Luminescence in Mn-Doped CsPbCl3 Nanocrystals[J]. Journal of Physical Chemistry C,2019,123(23):14849-14857.
APA	Q.Y.Li.,S.H.Ji.,X.Yuan.,J.Li.,Y.Fan.,...&J.L.Zhao.(2019).Ultraviolet Light-Induced Degradation of Luminescence in Mn-Doped CsPbCl3 Nanocrystals.Journal of Physical Chemistry C,123(23),14849-14857.
MLA	Q.Y.Li,et al."Ultraviolet Light-Induced Degradation of Luminescence in Mn-Doped CsPbCl3 Nanocrystals".Journal of Physical Chemistry C 123.23(2019):14849-14857.

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