scholarly journals Very low turn-on voltage and high brightness tris-(8-hydroxyquinoline) aluminum-based organic light-emitting diodes with a MoOx p-doping layer

2008 ◽  
Vol 92 (9) ◽  
pp. 093305 ◽  
Author(s):  
Guohua Xie ◽  
Yanlong Meng ◽  
Fengmin Wu ◽  
Chen Tao ◽  
Dandan Zhang ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
High Brightness ◽  
Light Emitting ◽  
Turn On ◽  
Organic Light

High-brightness blue organic light emitting diodes with different types of guest-host systems

2016 ◽  
Vol 12 (2) ◽  
pp. 89-92 ◽  
Author(s):  
Xiao Wang ◽  
Jing-shuang Zhang ◽  
Cui-yun Peng ◽  
Kun-ping Guo ◽  
Bin Wei ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
High Brightness ◽  
Light Emitting ◽  
Organic Light ◽  
Different Types

Highly efficient nondoped blue organic light-emitting diodes with high brightness and negligible efficiency roll-off based on anthracene-triazine derivatives

2019 ◽  
Vol 7 (47) ◽  
pp. 14881-14888 ◽  
Author(s):  
Futong Liu ◽  
Xiaxia Man ◽  
Hui Liu ◽  
Jiarui Min ◽  
Shiyuan Zhao ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Maximum Luminance ◽  
High Brightness ◽  
Light Emitting ◽  
Highly Efficient ◽  
Organic Light ◽  
Triazine Derivatives

A nondoped device based on the PIAnTAZ emitter shows blue electroluminescence with a maximum EQE of 7.96%, a maximum luminance of 58 675 cd m−2 and negligible efficiency roll-offs.

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.

Effect of Li2O/Al Cathode in Alq3 Based Organic Light-Emitting Diodes

2008 ◽  
Vol 8 (9) ◽  
pp. 4684-4687 ◽  
Author(s):  
Eun Chul Shin ◽  
Hui Chul Ahn ◽  
Wone Keun Han ◽  
Tae Wan Kim ◽  
Won Jae Lee ◽  
...  
Keyword(s):  
Power Efficiency ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Turn On ◽  
Organic Light ◽  
Maximum Current ◽  
The One ◽  
Luminance Efficiency ◽  
A Current

An effect of bilayer cathode Li2O/Al was studied in Alq3 based organic light-emitting diodes with a variation of Li2O layer thickness. The current-luminance-voltage characteristics of ITO/TPD/Alq3/Li2O/Al device were measured at ambient condition to investigate the effect of Li2O/Al. It was found that when the thickness of Li2O layer is in the range of 0.5∼1 nm, there are improvements in luminance, efficiency, and turn-on voltage of the device. A current density and a luminance are increased by about 100 times, a turn-on voltage is lowered from 6 V to 3 V, a maximum current efficiency is improved by a factor of 2.3, and a maximum power efficiency is improved by a factor of 3.2 for a device with a use of thin Li2O layer compared to those of the one without the Li2O layer. These improvements are thought to be due to a lowering of electron-barrier height for electron injection from the cathode to the emissive layer.

Low-driving-voltage sky-blue phosphorescent organic light-emitting diodes with bicarbazole-bipyridine bipolar host materials

2021 ◽  
Author(s):  
Deli Li ◽  
Di Liu ◽  
Jiuyan Li ◽  
Ruizhi Dong ◽  
Botao Liu ◽  
...  
Keyword(s):  
High Efficiency ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Driving Voltage ◽  
Light Emitting ◽  
Turn On ◽  
Organic Light ◽  
Host Materials ◽  
Blue Phosphorescent

Two bipolar host containing bipyridine and bicarbazole exhibited rapid and balanced charge transportation, which resulting the extremely low turn-on voltages of 2.3 and 2.4 V, respectively, and the high efficiency of 23.7% and 52.6 lm W−1.

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