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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
Author(s) -
Ying Shian,
Xiao Shu,
Yao Jingwen,
Sun Qian,
Dai Yanfeng,
Yang Dezhi,
Qiao Xianfeng,
Chen Jiangshan,
Zhu Tengfei,
Ma Dongge
Publication year - 2019
Publication title -
advanced optical materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.89
H-Index - 91
ISSN - 2195-1071
DOI - 10.1002/adom.201901291
Subject(s) - materials science , oled , color rendering index , luminance , optoelectronics , excimer , high color , diode , electrical efficiency , rendering (computer graphics) , white light , optics , power (physics) , fluorescence , nanotechnology , computer science , physics , computer graphics (images) , layer (electronics) , quantum mechanics , artificial intelligence , color image , image processing , image (mathematics)
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.