Efficient exciton regulation for high-performance hybrid white organic light-emitting diodes with superior efficiency/CRI/color stability based on blue aggregation-induced emission fluorophor

被引：0

作者：

Ying, Shian ^{[1
,2
]}

Liu, Wei ^{[3
,4
]}

Peng, Ling ^{[2
]}

Xiao, Shu ^{[1
]}

Yang, Dezhi ^{[1
]}

Qiao, Xianfeng ^{[1
]}

Chen, Jiangshan ^{[1
]}

Wang, Lei ^{[3
]}

Ma, Dongge ^{[1
]}

机构：

[1] Center for Aggregation-Induced Emission, Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou,510640, China

[2] Key Laboratory of Rubber-Plastics, Ministry of Education, Qingdao University of Science & Technology, Qingdao,266042, China

[3] Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan,430074, China

[4] Institute of Smart Materials & Engineering, University of Jinan, Jinan,250022, China

来源：

Organic Electronics | 2022年 / 101卷

基金：

中国国家自然科学基金;

关键词：

Organic light emitting diodes (OLED) - Excitons - Energy conservation - Stability - Supercomputers;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Fluorescent/phosphorescent hybrid white organic light-emitting diodes (WOLEDs) combining blue aggregation-induced emission (AIE) fluorophors with efficient yellow (or green/red) phosphors have attracted more attention in applications of full-color display and solid-state lighting. However, it is still a major challenge for hybrid WOLEDs based on AIE-active fluorophors to simultaneously realize high efficiency, high color rendering index (CRI), good color stability and low efficiency roll-off. Here, a sky-blue AIE fluorophor as the neat emitter has been successfully applied to high-performance blue OLED and two-/three-color hybrid WOLEDs. The blue device with a high exciton utilization efficiency of 47.4%–71.1% realizes the external quantum efficiencies (EQEs) of 6.3 and 5.5% at 1000 and 5000 cd m−2. By accurately managing the arrangement of emissive layers, Three-color WOLED without the damage of deep-blue light not only realizes high efficiencies of 41.6 cd A−1 and 46.6 lm W−1, but also shows a high CRI over 80 and good color stability with the Commission Internationale de L'Eclairage (CIE) coordinates changing from (0.432, 0.480) to (0.418, 0.488) when the driving voltage increases from 4 to 7 V, meeting the requirement for energy-saving and healthy lighting source. Such excellent EL performance is really rare in the no deep-blue light damage, high CRI and good color stability hybrid WOLEDs based on AIE-active fluorophor. © 2021

引用