氯化锌修饰蓝光量子点发光二极管

张玉玲; 肖毅; 王俊杰; 罗宇; 郭标; 李丹阳; 许伟; 彭俊彪

doi:10.37188/CJL.20210367

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氯化锌修饰蓝光量子点发光二极管

器件制备及器件物理 | 更新时间：2022-02-25

- 氯化锌修饰蓝光量子点发光二极管
  增强出版
- Zinc Chloride Modification of Blue Quantum Dot Light-emitting Diode
- 发光学报 2022年43卷第2期页码：238-246
- 作者机构：
  
  . 华南理工大学　发光材料与器件国家重点实验室，广东　广州　510641
- 作者简介：
  
  [ "张玉玲(1997-)，女，安徽庐江人，硕士研究生，2019年于安徽工业大学获得学士学位，主要从事量子点发光显示器件的研究。E-mail: ling2643239403@outlook.com" ]
  [ "彭俊彪(1962-)，男，山东宁津人，博士，教授，1993年于中国科学院长春物理研究所获得博士学位，主要从事发光显示器件与物理的研究。E-mail: psjbpeng@scut.edu.cn" ]
- 基金信息：
  
  国家自然科学基金(51521002;62074059;52073104);广东省科技计划(2019B030302007;2019B010934001)
- DOI：10.37188/CJL.20210367
  中图分类号： TN312.8
- 收稿：2021-11-18，
  
  修回：2021-12-01，
  
  纸质出版：2022-02
- 稿件说明：
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张玉玲, 肖毅, 王俊杰, 等. 氯化锌修饰蓝光量子点发光二极管[J]. 发光学报, 2022,43(2):238-246.

Yu-ling ZHANG, Yi XIAO, Jun-jie WANG, et al. Zinc Chloride Modification of Blue Quantum Dot Light-emitting Diode[J]. Chinese Journal of Luminescence, 2022, 43(2): 238-246.
张玉玲, 肖毅, 王俊杰, 等. 氯化锌修饰蓝光量子点发光二极管[J]. 发光学报, 2022,43(2):238-246. DOI： 10.37188/CJL.20210367.

Yu-ling ZHANG, Yi XIAO, Jun-jie WANG, et al. Zinc Chloride Modification of Blue Quantum Dot Light-emitting Diode[J]. Chinese Journal of Luminescence, 2022, 43(2): 238-246. DOI： 10.37188/CJL.20210367.

摘要

采用氯化锌(ZnCl

)修饰镉基CdSe/ZnS蓝光量子点(B-QD)薄膜，发现与量子点表面结合力更强的ZnCl

能够部分取代量子点长链配体油酸，有效钝化量子点表面缺陷，提高薄膜的荧光量子效率(PLQY)。此外，由于ZnCl

具有偶极作用，使量子点真空能级提高0.2 eV，一方面可改善电子和空穴载流子注入平衡，另一方面可有效降低发光器件的启亮电压，提高器件的发光寿命。这种无机配体修饰量子点薄膜的方法可能为解决蓝光量子点发光二极管(B-QLEDs)因空穴注入困难和量子点表面缺陷导致器件性能不高的问题提供一个有效思路。

Abstract

Inorganic zinc chloride(ZnCl

) was used as a ligand to modify cadmium-based blue quantum dot(B-QD) film. In this case

ZnCl

can partially replace the original long-chain ligand of oleic acid(OA) because of a strong interaction between ZnCl

and QDs. The replaced ZnCl

can passivate the surface defects of QDs to enhance the photoluminescence quantum yield(PLQY) of the QDs film. Meanwhile

the strategy can significantly improve carrier transport capacity and pull up the vacuum energy level of the QDs film by 0.2 eV due to ZnCl

dipoles

which may improve electron and hole injection balance

reduce the turn-on voltage of EL devices

and extend device lifetime as well. This method might provide an effective way to improve performances of blue quantum dot light-emitting diodes.

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Keywords

references

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