Ultraviolet Light-Induced Degradation of Luminescence in Mn-Doped CsPbCl3 Nanocrystals
文献类型：期刊论文
| 作者 | Q.Y.Li; S.H.Ji; X.Yuan; J.Li; Y.Fan; J.H.Zhang; J.L.Zhao |
| 刊名 | Journal of Physical Chemistry C
 |
| 出版日期 | 2019 |
| 卷号 | 123期号:23页码:14849-14857 |
| 关键词 | perovskite quantum dots,in-situ observation,energy-transfer,thermal-degradation,halide,emission,dynamics |
| ISSN号 | 1932-7447 |
| DOI | 10.1021/acs.jpcc.9b03294 |
| 英文摘要 | 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+. |
| URL标识 | 查看原文 |
| 语种 | 英语 |
| 源URL | [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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