Color-tunable QLED Based on Mixed Quantum Dots and Its White-light Application

Si-hua QUE; Li-ming WEI; Xiong-tu ZHOU; Yong-ai ZHANG; Chao-xing WU; Tai-liang GUO; Qun YAN

doi:10.37188/CJL.20210392

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Color-tunable QLED Based on Mixed Quantum Dots and Its White-light Application

Luminescence Industry and Technology Frontier | 更新时间：2022-04-20

- Color-tunable QLED Based on Mixed Quantum Dots and Its White-light Application
  增强出版
- Chinese Journal of Luminescence Vol. 43, Issue 4, Pages: 591-597(2022)
- 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：
- 基金信息：
  
  National Key R&D Program of China(2021YFB3600104);Natural Science Foundation of Fujian province, China(2021J01577)
- DOI：10.37188/CJL.20210392
  CLC： TN383;TN312
- Published：01 April 2022，
  
  Received：15 December 2021，
  
  Revised：06 January 2022，
- 稿件说明：
移动端阅览
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：

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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Related Author

si-hua QUE

qun YAN

Tai-liang GUO

Chao-xing WU

yong-ai ZHANG

xiong-tu ZHOU

li-ming WEI

Meng HAN

Related Institution

College of Physics and Information Engineering， Fuzhou University

State Key Laboratory of Rare Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences

School of Materials Science and Engineering, Jilin Jianzhu University

Department of Physics, College of Science, Yanbian University, Yanji

College of Information Science and Engineering, Huaqiao University, Xiamen 361021, China

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