High-Performance White Organic Light-Emitting Diodes with High Efficiency, Low Efficiency Roll-Off, and Superior Color Stability/Color Rendering Index by Strategic Design of Exciplex Hosts

被引：27

作者：

Ying, Shian ^{[1
]}

Xiao, Shu ^{[1
]}

Yao, Jingwen ^{[1
]}

Sun, Qion ^{[1
]}

Doi, Yanfeng ^{[1
]}

Yang, Dezhi ^{[1
]}

Qiao, Xianfeng ^{[1
]}

Chen, Jiangshan ^{[1
]}

Zhu, Tengfei ^{[2
]}

Ma, Dongge ^{[1
]}

机构：

[1] South China Univ Technol, State Key Lab Luminescent Mat & Devices, Inst Polymer Optoelect Mat & Devices, Ctr Aggregat Induced Emiss, Guangzhou 510640, Guangdong, Peoples R China

[2] Hangzhou Inst Test & Calibrat Qual & Tech Supervi, Hangzhou 310019, Zhejiang, Peoples R China

来源：

ADVANCED OPTICAL MATERIALS | 2019年 / 7卷 / 23期

基金：

中国国家自然科学基金;

关键词：

efficiency roll-off; exciplex host; multiemissive layers; white organic light-emitting diodes; EXTERNAL QUANTUM EFFICIENCY; FORMING COHOST; TRIPLET EXCITONS; EMISSIVE-LAYER; CHARGE; DEVICES; OLEDS;

D O I：

10.1002/adom.201901291

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

White organic light-emitting diodes (WOLEDs) are one of the most cogent candidates for environment friendly and healthy solid-state lighting due to many unique merits. Here, a strategic design of exciplex hosts is applied to simultaneously realize the superior color stability, high color rendering index (CRI), high efficiency, and low efficiency roll-off properties of WOLEDs. The resulting WOLEDs emit the forward-viewing maximum power efficiency (PE) of 59.9 lm W-1, and the PE still remains 45.3 and 31.9 lm W-1 at 1000 and 5000 cd m(-2), respectively, exhibiting extremely low efficiency roll-off. More remarkably, the devices also show high CRI over 80 and extremely stable spectral emission in the luminance ranges from 1000 to 15 000 cd m(-2). The excellent performances indicate the validity of the structure design and provide a new route for the development of high-performance WOLEDs.

引用

页数：8

共 42 条

[1] Highly efficient phosphorescent emission from organic electroluminescent devices [J].