钾辅助增强CsPbBr<sub>3</sub>钙钛矿量子点的荧光稳定性及其在QLEDs中的应用

常月; 赵海鹏; 包云; 张飞鹏

doi:10.3788/fgxb20204106.0691

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钾辅助增强CsPbBr₃钙钛矿量子点的荧光稳定性及其在QLEDs中的应用

材料合成及性能 | 更新时间：2020-09-15

- 钾辅助增强CsPbBr₃钙钛矿量子点的荧光稳定性及其在QLEDs中的应用
- Potassium-assisted Enhancement of Fluorescence Stability of CsPbBr₃ Perovskite Quantum Dots and Their Application in QLEDs
- 发光学报 2020年41卷第6期页码：691-699
- 作者机构：
  
  1.河南城建学院材料与化工学院, 河南平顶山 467036
  2.河南城建学院数理学院, 河南平顶山 467036
- 作者简介：
  
  [ "常月(1993-), 女, 河南南阳人, 学士, 2019年于河南城建学院获得学士学位, 主要从事钙钛矿纳米材料的研究。E-mail:2799201260@qq.com" ]
  [ "赵海鹏(1963-), 男, 河南扶沟人, 博士, 教授, 2008年于清华大学获得博士学位, 主要从事新能源材料和化工新材料方面的研究。E-mail:30100002@hncj.edu.cn" ]
- 基金信息：
  
  国家自然科学基金(51572066)
- DOI：10.3788/fgxb20204106.0691
  中图分类号： O482.31
- 纸质出版日期：2020-6，
  
  收稿日期：2020-3-18，
  
  录用日期：2020-4-12
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常月, 赵海鹏, 包云, 等. 钾辅助增强CsPbBr₃钙钛矿量子点的荧光稳定性及其在QLEDs中的应用[J]. 发光学报, 2020,41(6):691-699.

Yue CHANG, Hai-peng ZHAO, Yun BAO, et al. Potassium-assisted Enhancement of Fluorescence Stability of CsPbBr₃ Perovskite Quantum Dots and Their Application in QLEDs[J]. Chinese Journal of Luminescence, 2020,41(6):691-699.
常月, 赵海鹏, 包云, 等. 钾辅助增强CsPbBr₃钙钛矿量子点的荧光稳定性及其在QLEDs中的应用[J]. 发光学报, 2020,41(6):691-699. DOI： 10.3788/fgxb20204106.0691.

Yue CHANG, Hai-peng ZHAO, Yun BAO, et al. Potassium-assisted Enhancement of Fluorescence Stability of CsPbBr₃ Perovskite Quantum Dots and Their Application in QLEDs[J]. Chinese Journal of Luminescence, 2020,41(6):691-699. DOI： 10.3788/fgxb20204106.0691.

摘要

为了提高钙钛矿（CsPb

，

=Cl，Br，I）量子点的荧光稳定性，实现钙钛矿量子点在下一代平板显示与固态光源中的长期应用，研究了钾元素对量子点荧光性能的影响。首先，采用热注入法合成了CsPbBr

钙钛矿量子点。接着，用油酸钾与上述钙钛矿量子点进行反应，制备了钾元素修饰的钙钛矿量子点。最后，将这些钙钛矿量子点应用于发光二极管的发光层。实验结果表明，当油酸钾的含量为20 μL/mL时，钾元素修饰的量子点的荧光性能优于未修饰的量子点。相比于未修饰的量子点所制备的器件，钾元素修饰的量子点所制备器件的最大亮度从1 845 cd/m

增加到4 300 cd/m

，最大电流效率从0.3 cd/A增加到1.3 cd/A。因此钾元素的引入可以有效地抑制量子点表面缺陷的产生，减少荧光量子产率的损失，增强量子点的荧光稳定性，实现更优越的器件性能。

Abstract

In order to improve the fluorescence stability of perovskite quantum dots(PQDs) (CsPb

=Cl

I) and realize long-term application in the next generation of flat panel displays and solid-state lighting

the effect of potassium on the fluorescence performance of PQDs was studied. First

CsPbBr

PQDs were synthesized by hot injection method. Then

potassium oleate (KOA) was reacted with the above-objected PQDs to prepare K-modified PQDs(K-PQDs). Finally

these PQDs were applied to the emitting layer of the quantum light emitting diodes(QLEDs). The experimental results show that when the content of KOA is 20 μL/mL

the fluorescence performance of K-PQDs is better than unmodified PQDs. Compared with devices made with unmodified PQDs

the maximum luminance of devices made with K-PQDs increased from 1 845 to 4 300 cd/m

and the maximum current efficiency increased from 0.3 to 1.3 cd/A. Therefore

the introduction of potassium can effectively suppress the generation of surface defects of PQDs

reduce the loss of photoluminescence quantum yield(PLQYs)

enhance the fluorescence stability of PQDs

and achieve more excellent device performance.

关键词

钙钛矿量子点钾元素卤素空位稳定性

Keywords

perovskite quantum dotspotassium elementhalogen vacancystability

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钾辅助增强CsPbBr3钙钛矿量子点的荧光稳定性及其在QLEDs中的应用

Potassium-assisted Enhancement of Fluorescence Stability of CsPbBr3 Perovskite Quantum Dots and Their Application in QLEDs

DOI：10.3788/fgxb20204106.0691

摘要

Abstract

关键词

Keywords

references

钾辅助增强CsPbBr₃钙钛矿量子点的荧光稳定性及其在QLEDs中的应用

Potassium-assisted Enhancement of Fluorescence Stability of CsPbBr₃ Perovskite Quantum Dots and Their Application in QLEDs