中国物理B ›› 2016, Vol. 25 ›› Issue (12): 128502-128502.doi: 10.1088/1674-1056/25/12/128502
• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇 下一篇
Jin Cao(曹进), Jing-Wei Xie(谢婧薇), Xiang Wei(魏翔), Jie Zhou(周洁), Chao-Ping Chen(陈超平), Zi-Xing Wang(王子兴), Chulgyu Jhun(田哲圭)
Jin Cao(曹进)2, Jing-Wei Xie(谢婧薇)1, Xiang Wei(魏翔)2, Jie Zhou(周洁)2, Chao-Ping Chen(陈超平)3, Zi-Xing Wang(王子兴)2, Chulgyu Jhun(田哲圭)4
摘要:
A bright white quantum dot light-emitting device (white-QLED) with 4-[4-(1-phenyl-1H-benzo[d]imidazol-2-yl)phenyl]-2-[3-(tri-phenylen-2-yl)phen-3-yl]quinazoline deposited on a thin film of mixed green/red-QDs as a bilayer emitter is fabricated. The optimized white-QLED exhibits a turn-on voltage of 3.2 V and a maximum brightness of 3660 cd/m2@8 V with the Commission Internationale de l'Eclairage (CIE) chromaticity in the region of white light. The ultra-thin layer of QDs is proved to be critical for the white light generation in the devices. Excitation mechanism in the white-QLEDs is investigated by the detailed analyses of electroluminescence (EL) spectral and the fluorescence lifetime of QDs. The results show that charge injection is a dominant mechanism of excitation in the white-QLED.
中图分类号: (Light-emitting devices)