题目：

Polymer as An Additive in The Emitting Layer for High-Performance Quantum Dot Light-Emitting Diodes

作者：

Feng Liang, Yuan Liu, Yun Hu, Ying-Li Shi, Yu-Qiang Liu, Zhao-Kui Wang, Xue-Dong Wang, Bao-Quan Sun, and Liang-Sheng Liao*

单位：

Institute of Functional Nano & Soft Materials (FUNSOM), Collaborative Innovation Center of Suzhou Nanoscience and Technology, Soochow University, 199 Ren-Ai Road, Suzhou 215123, China.

摘要：

A facile but effective method is proposed to improve the performance of quantum dot light-emitting diodes (QLEDs) by incorporating a polymer, poly(9-vinlycarbazole) (PVK), as an additive into the CdSe/CdS/ZnS quantum dot (QD) emitting layer (EML). It is found that the charge balance of the device with the PVK-added EML was greatly improved. In addition, the film morphology of the hole-transporting layer (HTL) which is adjacent to the EML, is substantially improved. The surface roughness of the HTL is reduced from 5.87 to 1.38 nm, which promises a good contact between the HTL and the EML, resulting in low leakage current. With the improved charge balance and morphology, a maximum external quantum efficiency (EQE) of 16.8% corresponding to the current efficiency of 19.0 cd/A is achievable in the red QLEDs. The EQE is 1.6 times as high as that (10.5%) of the reference QLED, comprising a pure QD EML. This work demonstrates that incorporating some polymer molecules into the QD EML as additives could be a facile route toward high-performance QLEDs.

影响因子：

7.504

分区情况：

一区

链接：

http://pubs.acs.org/doi/pdf/10.1021/acsami.7b05629