Efficient Quantum-Dot Light-Emitting Diodes With 4,4,4-Tris(N-Carbazolyl)-Triphenylamine (TcTa) Electron-Blocking Layer

被引:36
作者
Peng, Huiren [1 ]
Wang, Weigao [1 ]
Chen, Shuming [1 ]
机构
[1] South Univ Sci & Technol China, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China
基金
中国国家自然科学基金;
关键词
Electron-blocking; exciton confinement; quantum-dot; light-emitting diodes; TcTa; PERFORMANCE; DEVICES;
D O I
10.1109/LED.2015.2398850
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
4,4,4-tris(N-carbazolyl)-triphenylamine (TcTa) with low electron mobility are used as electron-blocking layer (EBL) for quantum-dot light-emitting diodes (QD-LEDs). With TcTa EBL, electrons are effectively blocked, while holes are efficiently injected; consequently, the developed QD-LEDs exhibit significantly improved performance. Maximum external quantum efficiency of 5% and maximum luminance of 16 710 cd/m(2) are achieved, which represent a 2.7-fold and a 2-fold improvement, respectively, compared with those of the devices without TcTa EBL.
引用
收藏
页码:369 / 371
页数:3
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