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

2019 ◽  
Vol 7 (23) ◽  
pp. 1901291 ◽  
Author(s):  
Shian Ying ◽  
Shu Xiao ◽  
Jingwen Yao ◽  
Qian Sun ◽  
Yanfeng Dai ◽  
...  
Keyword(s):  
High Performance ◽  
High Efficiency ◽  
Color Stability ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Strategic Design ◽  
Organic Light ◽  
Color Rendering Index ◽  
Low Efficiency ◽  
Color Rendering

Improvement of efficiency and its roll-off at high brightness in white organic light-emitting diodes by strategically managing triplet excitons in the emission layer

2018 ◽  
Vol 6 (40) ◽  
pp. 10793-10803 ◽  
Author(s):  
Shian Ying ◽  
Dezhi Yang ◽  
Xianfeng Qiao ◽  
Yanfeng Dai ◽  
Qian Sun ◽  
...  
Keyword(s):  
High Performance ◽  
High Efficiency ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Emission Layer ◽  
High Brightness ◽  
Light Emitting ◽  
Organic Light ◽  
Low Efficiency ◽  
Triplet Excitons

High-performance WOLEDs realizing high efficiency and low efficiency roll-off simultaneously were achieved by strategically managing triplet excitons in the emission layer.

Simultaneous high efficiency/CRI/spectral stability and low efficiency roll-off hybrid white organic light-emitting diodes via simple insertion of ultrathin red/green phosphorescent emitters in a blue exciplex

2020 ◽  
Vol 8 (36) ◽  
pp. 12450-12456 ◽  
Author(s):  
Yuwen Chen ◽  
Yibing Wu ◽  
Chengwei Lin ◽  
Yanfeng Dai ◽  
Qian Sun ◽  
...  
Keyword(s):  
High Performance ◽  
High Efficiency ◽  
Light Emitting Diodes ◽  
Spectral Stability ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light ◽  
Low Efficiency

High performance hybrid WOLEDs have been realized by precisely inserting ultrathin red/green phosphorescent layers in a blue exciplex emitter.

Efficient co-doped white organic light-emitting diodes with high color stability and color rendering index

Displays ◽  
2011 ◽  
Vol 32 (5) ◽  
pp. 320-324 ◽  
Author(s):  
Xue Chen ◽  
Wenqing Zhu ◽  
Sai Wang ◽  
Feng Xu ◽  
Hong Xu ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Color Stability ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light ◽  
Color Rendering Index ◽  
Color Rendering ◽  
Co Doped

scholarly journals Tandem white organic light-emitting diodes stacked with two symmetrical emitting units simultaneously achieving superior efficiency/CRI/color stability

Nanophotonics ◽  
2019 ◽  
Vol 8 (10) ◽  
pp. 1783-1794 ◽  
Author(s):  
Yanqin Miao ◽  
Xiaozhen Wei ◽  
Long Gao ◽  
Kexiang Wang ◽  
Bo Zhao ◽  
...  
Keyword(s):  
High Performance ◽  
Light Emitting Diodes ◽  
Color Stability ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
White Emission ◽  
Color Quality ◽  
Organic Light ◽  
Novel Approach ◽  
Color Rendering

AbstractIn this work, a series of three and four-color tandem white organic light-emitting diodes (WOLEDs) are developed by using the optimized charge generating unit (CGU) to connect two electroluminescence (EL) units with symmetrical emitting layers, in which symmetrical emitting layers are constructed based on the mixed hosts; sandwiched between hole and electron-transporting hosts and the light emitted from two EL units that are absolutely complementary for forming white emission. All resulting tandem WOLEDs realize good white emission with maximum color rendering index (CRI) beyond 77 and 90 for three and four-color white devices and extremely high EL spectra stability, and also achieve high device efficiency with maximum external quantum efficiency (EQE) exceeding 33.10%. For example, for the optimized four-color tandem WOLED, the maximum CRI and EQE of 91 and 34.78% are demonstrated and only very slight CIE (Δx, Δy) variation of (0.002, −0.010) was observed at a wide luminance range from 170.9 cd/m2 to 13,870 cd/m2. To the best of our knowledge, this is the first tandem WOLED with only two EL units realizing such high device performances. More importantly, the proposed tandem WOLEDs here avoid introducing carrier or exciton blocking layer or using more EL units to realize high color quality white emission that provides a novel approach to develop simple, but high-performance tandem WOLEDs.

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