Improved performance of CdSe/ZnS quantum dot light-emitting diodes through doping with small molecule CBP  

作　　者：LIN Yuhan HUANG Ye ZHU Qianpeng ZHANG Genggeng HU Junta 林钰涵;黄叶;朱钱鹏;张庚庚;胡俊涛(National Engineering Lab of Special Display Technology',State Key Lab of Advanced Display Technology,Academy of Opto-Electronic Technology',Hefei University of Technology,Hefei 230009,China;School of Electronic Science and Applied Physics,Hefei University of Technology,Hefei 230009,China;School of Instrument Science and Opto-electronics Engineering,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]National Engineering Lab of Special Display Technology',State Key Lab of Advanced Display Technology,Academy of Opto-Electronic Technology',Hefei University of Technology,Hefei 230009,China [2]School of Electronic Science and Applied Physics,Hefei University of Technology,Hefei 230009,China [3]School of Instrument Science and Opto-electronics Engineering,Hefei University of Technology,Hefei 230009,China

出　　处：《Optoelectronics Letters》2021年第11期656-660,共5页光电子快报（英文版）

基　　金：supported by the Fundamental Research Funds for the Central Universities of China (No.JD2019JGPY0020);the National Natural Science Foundation of China (No.51573036);the Industry-University-Research Cooperation Project of Aviation Industry Corporation of China (No.CXY2013HFGD20)。

摘　　要：The poor film formation of Cd Se/Zn S quantum dots(QDs) during spin-coating makes a substantial impact on the device performance of quantum dot light-emitting diodes(QLEDs). This work proposes a method to improve the morphology of the quantum dot light-emitting layer(EML) by adding small organic molecular 4,4'-Bis(9 H-carbazol-9-yl) biphenyl(CBP) into the layer. Its surface roughness reduces from 6.21 nm to 2.71 nm, which guarantees a good contact between hole transport layer(HTL) and EML. Consequently, the Cd Se/Zn S QDs:CBP based QLED achieves maximum external quantum efficiency(EQE) of 5.86%, and maximum brightness of 10 363 cd/m^(2). It is demonstrated that the additive of small organic molecules could be an effective way to improve the brightness and the efficiency of QLEDs.

关 键 词：QDs Improved performance of CdSe/ZnS quantum dot light-emitting diodes through doping with small molecule CBP ZnS 

分 类 号：TN312.8[电子电信—物理电子学]