Photoluminescence Properties of Mn Doped CsPbCl3 Perovskite Quantum Dots

CHEN Xiao-hui; JI Si-hang; YUAN Xi; ZHAO Jia-long

doi:10.3788/fgxb20183905.0609

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Photoluminescence Properties of Mn Doped CsPbCl₃ Perovskite Quantum Dots

更新时间：2020-08-12

- Photoluminescence Properties of Mn Doped CsPbCl₃ Perovskite Quantum Dots
- Chinese Journal of Luminescence Vol. 39, Issue 5, Pages: 609-614(2018)
- 作者机构：
  
  1. 东北大学理学院, 辽宁沈阳 110016
  2. 吉林师范大学功能材料物理与化学教育部重点实验室, 吉林四平 136000
- 作者简介：
- 基金信息：
  
  Supported by National Natural Science Foundation of China (11704152);Key Program f
- DOI：10.3788/fgxb20183905.0609
  CLC： O482.31
- Received：22 August 2017，
  
  Revised：13 November 2017，
  
  Published Online：27 November 2017，
  
  Published：05 May 2018
- 稿件说明：
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陈肖慧, 季思航, 袁曦等. Mn掺杂CsPbCl3钙钛矿量子点的发光性质[J]. 发光学报, 2018,39(5): 609-614

CHEN Xiao-hui, JI Si-hang, YUAN Xi etc. Photoluminescence Properties of Mn Doped CsPbCl3 Perovskite Quantum Dots[J]. Chinese Journal of Luminescence, 2018,39(5): 609-614
陈肖慧, 季思航, 袁曦等. Mn掺杂CsPbCl3钙钛矿量子点的发光性质[J]. 发光学报, 2018,39(5): 609-614 DOI： 10.3788/fgxb20183905.0609.

CHEN Xiao-hui, JI Si-hang, YUAN Xi etc. Photoluminescence Properties of Mn Doped CsPbCl3 Perovskite Quantum Dots[J]. Chinese Journal of Luminescence, 2018,39(5): 609-614 DOI： 10.3788/fgxb20183905.0609.

摘要

研究了不同Mn/Pb量比的Mn掺杂CsPbCl

（Mn：CsPbCl

）钙钛矿量子点的发光性质。Mn/Pb的量比增加引起的Mn

发光峰的红移，被认为是来源于高浓度Mn

掺杂下的Mn

-Mn

对。进一步研究了Mn：CsPbCl

量子点的发光效率与Mn/Pb的量比之间的关系，发现随着量比达到5：1时，其发光效率明显下降。这种发光效率下降是由于Mn掺杂浓度引起的发光猝灭。Mn：CsPbCl

量子点的变温发光光谱证实，随着温度的升高，Mn离子发光峰蓝移，线宽加宽，但其发光强度明显增加。

Abstract

Photoluminescence(PL) properties of Mn doped CsPbCl

(Mn:CsPbCl

) perovskite quantum dots(QDs) with various Mn/Pb molar ratios were studied. Two emission bands peaked at around 400 nm and 600 nm

respectively

were observed in Mn:CsPbCl

QDs at room temperature. The PL intensity of Mn ion emission in the Mn:CsPbCl

QDs was significantly enhanced with respect to the band edge exciton emission as Mn/Pb molar ratio increased from 0.5:1 to 5:1. Both the exciton absorption and emission bands in the doped QDs shifted to the blue

which was consistent with the reduction of the QD size. The red shift of Mn

emission band with increasing the molar ratio was considered to result from the formation of Mn

-Mn

pairs in the doped QDs due to high concentration Mn doping. Further

the PL quantum efficiency of Mn:CsPbCl

QDs as a function of Mn/Pb molar ratio was studied in detail. It is found that the PL quantum yield of Mn

gradually increases with the increasing of Mn/Pb molar ratio. The maximum PL quantum yield reaches 62% as Mn/Pb molar ratio is 2:1. The PL quantum yield drops continually with the increasing of Mn/Pb molar ratio to 5:1. The reduction of PL quantum yield at high concentration Mn doping is related to Mn doping concentration-induced PL quenching due to the formation of Mn

-Mn

pairs. The temperature-dependence of PL spectra in Mn:CsPbCl

QDs demonstrates that Mn

emission band shifts to the blue and the emission width is broadened

while PL intensity increases

which is in contrast to Ⅱ-Ⅵ semiconductor QDs.

关键词

Keywords

references

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