High-Performance Hybrid White Organic Light-Emitting Diodes with Superior Efficiency/Color Rendering Index/Color Stability and Low Efficiency Roll-Off Based on a Blue Thermally Activated Delayed Fluorescent Emitter

2016 ◽  
Vol 26 (19) ◽  
pp. 3306-3313 ◽  
Author(s):  
Zhongbin Wu ◽  
Jiajia Luo ◽  
Ning Sun ◽  
Liping Zhu ◽  
Hengda Sun ◽  
...  
Keyword(s):  
High Performance ◽  
Light Emitting Diodes ◽  
Color Stability ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Thermally Activated ◽  
Organic Light ◽  
Color Rendering Index ◽  
Low Efficiency ◽  
Color Rendering

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.

High-performance hybrid white organic light-emitting diodes with simple emitting structures and low efficiency roll-off based on blue thermally activated delayed fluorescence emitters with bipolar transport characteristics

2018 ◽  
Vol 6 (35) ◽  
pp. 9510-9516 ◽  
Author(s):  
Chenyang Zhao ◽  
Tianmu Zhang ◽  
Jiangshan Chen ◽  
Donghang Yan ◽  
Dongge Ma
Keyword(s):  
High Performance ◽  
Light Emitting Diodes ◽  
Delayed Fluorescence ◽  
Organic Light Emitting Diodes ◽  
Thermally Activated Delayed Fluorescence ◽  
Light Emitting ◽  
Thermally Activated ◽  
Highly Efficient ◽  
Organic Light ◽  
Low Efficiency

Highly efficient and low efficiency roll-off WOLEDs by simple insertion of multi-ultrathin phosphorescent layers within blue TADF emitters.

Sign in / Sign up

Export Citation Format

Share Document