Colloidal quantum-dot light emitting diodes with bias-tunable color

作     者：GE MU TIANYU RAO MENGLU CHEN YIMEI TAN QUN HAO XIN TANG 

作者机构：School of Optics and PhotonicsBeijing Institute of TechnologyBeijing 100081China Beijing Key Laboratory for Precision Optoelectronic Measurement Instrument and TechnologyBeijing 100081China Yangtze Delta Region Academy of Beijing Institute of TechnologyJiaxing 314019China 

出 版 物：《Photonics Research》 (光子学研究（英文版）)

年 卷 期：2022年第10卷第7期

页      面：1633-1639页

核心收录：

学科分类：08[工学] 0803[工学-光学工程] 

基　　金：National Key Research and Development Program of China(2021YFA0717600) National Natural Science Foundation of China(62035004,62105022) 

主　　题：tunable diodes emitting 

摘      要：Although the performance of quantum-dot-based light emitting diodes(QLEDs)has been significantly enhanced over the past years,conventional full-color QLED displays still rely on the side-by-side pattern techniques of red(R)/green(G)/blue(B)quantum dots(QDs).Such lateral integration of multi-color pixels imposes technological difficulty in the development of high-resolution displays due to limited pixel density and fill ***,we demonstrate the development of full-color QLEDs with bias-tunable emission spectra by engineering mixed R/G/B QDs as light emitting *** Commission Internationale de l Eclairage(CIE)chromaticity coordinates,QLEDs with bias-tunable color exhibit wide color variation ranging from red(0.649,0.330)to green(0.283,0.305)to blue(0.255,0.264)upon increasing voltages and can be tuned to emit white light(0.316,0.325).More importantly,the fabricated multi-color QLEDs show high luminance approaching 103cd m^(-2)and superior external quantum efficiency of 13.3%.Benefitting from the wide spectral tunability and light emitting efficiency,we believe the proposed multi-color QLEDs have great application prospects for both displays and lighting.