An unprecedented spike of the electroluminescence turn-on transient from guest-doped OLEDs with strong electron-donating abilities of host carbazole groups

2021 ◽  
Author(s):  
Jing Chen ◽  
Xi Zhao ◽  
Xiantong Tang ◽  
Yaru Ning ◽  
Fengjiao Wu ◽  
...  
Keyword(s):  
Line Width ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Strong Electron ◽  
Light Emitting ◽  
Turn On ◽  
Organic Light ◽  
Transient Electroluminescence

An unreported amazing spike of ~μs line-width followed by an overshoot is discovered at the rising edge of transient electroluminescence (TEL) from guest-doped organic light-emitting diodes with strong electron-donating abilities...

Kinetics of transient electroluminescence in organic light emitting diodes

2008 ◽  
Vol 41 (16) ◽  
pp. 165101 ◽  
Author(s):  
Manju Shukla ◽  
Pankaj Kumar ◽  
Suresh Chand ◽  
Nameeta Brahme ◽  
R S Kher ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light ◽  
Transient Electroluminescence ◽  
Kinetics Of

Acene-based organic semiconductors for organic light-emitting diodes and perovskite solar cells

2018 ◽  
Vol 6 (33) ◽  
pp. 9017-9029 ◽  
Author(s):  
Hong Duc Pham ◽  
Hongwei Hu ◽  
Fu-Lung Wong ◽  
Chun-Sing Lee ◽  
Wen-Cheng Chen ◽  
...  
Keyword(s):  
Solar Cells ◽  
Small Molecules ◽  
Organic Semiconductors ◽  
Light Emitting Diodes ◽  
Perovskite Solar Cells ◽  
Organic Light Emitting Diodes ◽  
Strong Electron ◽  
Light Emitting ◽  
Organic Light

A series of strong electron-rich small molecules based on acenes were designed and synthesized for application in green/blue organic light-emitting diodes and perovskite solar cells.

Overshoot effect in transient electroluminescence from single layer organic light-emitting diodes

2001 ◽  
Vol 90 (11) ◽  
pp. 5554-5560 ◽  
Author(s):  
J. Pommerehne ◽  
D. V. Nikolaenkov ◽  
V. R. Nikitenko ◽  
H. Bässler
Keyword(s):  
Light Emitting Diodes ◽  
Single Layer ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light ◽  
Transient Electroluminescence

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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