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Fluorescence properties of potassium ions doped CsPbCl3: Mn perovskite quantum dots
- Chinese Journal of Liquid Crystals and Displays Vol. 36, Issue 10, Pages: 1352-1361(2021)
- 作者机构：
中国计量大学 光学与电子科技学院, 浙江 杭州 310018
- 作者简介：
- 基金信息：Preeminence Youth Science Funds of Zhejiang Province(LR19F050001);National Natural Science Foundation of China(62075203);National Natural Science Foundation of China(51832005);National Natural Science Foundation of China(51702339)
DOI：10.37188/CJLCD.2021-0161
CLC： O482.31Received：17 June 2021，
Revised：19 July 2021，
Published：2021-10
- 稿件说明：
移动端阅览
Peng CHANG, Yue ZHAI, Na WU, et al. Fluorescence properties of potassium ions doped CsPbCl3: Mn perovskite quantum dots[J]. Chinese journal of liquid crystals and displays, 2021, 36(10): 1352-1361.
Peng CHANG, Yue ZHAI, Na WU, et al. Fluorescence properties of potassium ions doped CsPbCl3: Mn perovskite quantum dots[J]. Chinese journal of liquid crystals and displays, 2021, 36(10): 1352-1361. DOI： 10.37188/CJLCD.2021-0161.
摘要
锰（Mn
2+
）离子掺杂的全无机CsPbCl
3
钙钛矿量子点具有独特的光学特性和纳米级颗粒尺寸，在Mini/Micro-LED显示器件中具有巨大的应用潜力。然而，当前CsPbCl
3
：Mn
2+
钙钛矿量子点的荧光量子效率较低，无法满足实际应用需求。针对此问题，本文采用热注入法制备了钾（K
+
）离子和Mn
2+
离子共掺杂的CsPbCl
3
钙钛矿量子点，合成的CsPbCl
3
：（K
+
，Mn
2+
）钙钛矿量子点具有双光发射特性，其发光主要来源于钙钛矿激子和掺杂的Mn
2+
离子。通过优化K
+
离子的掺杂浓度，CsPbCl
3
：（K
+
，Mn
2+
）钙钛矿量子点的荧光量子效率从原始的16.5%提高到66.2%。同时研究了K
+
离子掺杂对CsPbCl
3
：Mn
2+
钙钛矿量子点荧光性能的调控机制。研究结果表明，K
+
离子的掺杂能够有效抑制CsPbCl
3
：（K
+
，Mn
2+
）钙钛矿量子点中本征缺陷态以及Mn-Mn二聚体或Mn相关缺陷态，进而增强了量子点中载流子的辐射复合发光。得益于异质离子掺杂的调控策略，此类掺杂型钙钛矿量子点有望应用于Mini/Micro-LED显示领域。
Abstract
Manganese (Mn
2+
) ion-doped all-inorganic CsPbCl
3
perovskite quantum dots have shown great potential for application in Mini/Micro-LED display devices due to their unique photoluminescence properties and nano-scale particle size. However
the current photoluminescence quantum yields of CsPbCl
3
: Mn
2+
perovskite quantum dots is low and cannot meet the needs of practical applications. Herein
the potassium (K
+
) and Mn
2+
ions co-doped CsPbCl
3
perovskite quantum dots are synthesized via the hot injection method. The prepared CsPbCl
3
: (K
+
Mn
2+
) perovskite quantum dots present a dual-color emission
which can be assigned to the perovskite excitons emission and Mn
2+
ions emission. The photoluminescence quantum yield of CsPbCl
3
: (K
+
Mn
2+
) perovskite quantum dots is improved from 16.5% of original to 66.2% through the optimization of K
+
ions doping concentration. Meanwhile
the regulation mechanism of K
+
ions doping on the photoluminescence properties of CsPbCl
3
: Mn
2+
perovskite quantum dots are investigated. It is shown that the incorporation of K
+
ions can effectively inhibit the formation of intrinsic defect states and Mn-Mn dimers or Mn-related defects in CsPbCl
3
: (K
+
Mn
2+
) perovskite quantum dots
thus enhancing the radiative recombination luminescence of carriers in perovskite quantum dots. Benefiting from the strategy of hetero-ions doping
these doped perovskite quantum dots are expected to be applied in Mini/Micro-LED display fields.
关键词
Keywords
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