基于混合量子点的颜色可调QLED器件性能及其白光应用

阙思华; 卫黎明; 周雄图; 张永爱; 吴朝兴; 郭太良; 严群

doi:10.37188/CJL.20210392

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基于混合量子点的颜色可调QLED器件性能及其白光应用

发光产业及技术前沿 | 更新时间：2022-04-20

- 基于混合量子点的颜色可调QLED器件性能及其白光应用
  增强出版
- Color-tunable QLED Based on Mixed Quantum Dots and Its White-light Application
- 发光学报 2022年43卷第4期页码：591-597
- 作者机构：
  
  1.福州大学　物理与信息工程学院，福建　福州　350116
  2.中国福建光电信息科学与技术创新实验室，福建　福州　350116
- 作者简介：
  
  [ "阙思华(1996-)，男，福建龙岩人，硕士研究生，2019年于福州大学获得学士学位，主要从事光电显示技术与器件的研究。E-mail: 1306505551@qq.com" ]
  [ "周雄图(1982-)，男，福建晋江人，博士，教授，2010年于华东师范大学获得博士学位，主要从事光电显示技术与器件的研究。E-mail: xtzhou@fzu.edu.cn" ]
- 基金信息：
  
  国家重点研发计划(2021YFB3600104);福建省自然科学基金(2021J01577)
- DOI：10.37188/CJL.20210392
  中图分类号： TN383;TN312
- 纸质出版日期：2022-04-01，
  
  收稿日期：2021-12-15，
  
  修回日期：2022-01-06，
扫描看全文
阙思华, 卫黎明, 周雄图, 等. 基于混合量子点的颜色可调QLED器件性能及其白光应用[J]. 发光学报, 2022,43(4):591-597.

Si-hua QUE, Li-ming WEI, Xiong-tu ZHOU, et al. Color-tunable QLED Based on Mixed Quantum Dots and Its White-light Application[J]. Chinese Journal of Luminescence, 2022,43(4):591-597.
阙思华, 卫黎明, 周雄图, 等. 基于混合量子点的颜色可调QLED器件性能及其白光应用[J]. 发光学报, 2022,43(4):591-597. DOI： 10.37188/CJL.20210392.

Si-hua QUE, Li-ming WEI, Xiong-tu ZHOU, et al. Color-tunable QLED Based on Mixed Quantum Dots and Its White-light Application[J]. Chinese Journal of Luminescence, 2022,43(4):591-597. DOI： 10.37188/CJL.20210392.

摘要

采用红色、绿色混合量子点作为发光层，制备了结构为ITO/PEDOT∶PSS/TFB/Mixed-QDs/ZnO/Ag的颜色可调量子点发光二极管(QLED)器件，研究了QLED器件的电致发光光谱。实验结果表明，混合QLED器件具有明显的颜色可调特性。随着外加电压增大，混合QLED器件呈现出从暗红色到橙黄色再到耀眼的黄绿色的颜色变化。其开启电压为2.0 V，最大亮度可达到6×10

cd/m

；且器件在31 934 cd/m

亮度下实现了21 cd/A的最大电流效率和7.5%的最大外量子效率。作为应用展示，本文将颜色可调的混合QLED器件与氮化镓基蓝光LED相结合制备了白光LED，相关色温可从3 568 K(暖白光) 调至10 269 K(冷白光)，且显色指数不低于70，在照明应用中具有广阔的应用前景。

Abstract

A color tunable quantum-dot light emitting diode(QLED) with the structure of ITO/PEDOT∶PSS/TFB/Mixed-QDs/ZnO/Ag was fabricated by using red and green mixed quantum dots as the light-emitting layer

and the electroluminescence spectrum of QLED device was studied. The experimental results show that the QLED device has significant color tunability. With the increase of applied voltage

the QLED device presents a color change from dark red to orange and then to dazzling yellow-green. The QLED device exhibits a turn-on voltage of 2.0 V and the maximum brightness can reach 6×10

cd/m

. What's more

the device achieves a maximum current efficiency of 21 cd/A and a maximum external quantum efficiency of 7.5% at 31 934 cd/m

. As an application demonstration

we further combine the color tunable QLED device with GaN-based blue LED to prepare a white light emission. The results show that the color temperature of white light emission can be tuned from 3 568 K(warm white) to 10 269 K(cold white) and color rendering index is not less than 70

exhibiting great prospects in the application of lighting.

关键词

量子点发光二极管颜色可调白光应用相关色温

Keywords

quantum-dot light emitting diodecolor tunablewhite-light applicationcorrelated color temperature

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