scholarly journals Efficient green electroluminescence based on an iridium(iii) complex with different device structures

RSC Advances ◽  
2017 ◽  
Vol 7 (5) ◽  
pp. 2615-2620 ◽  
Author(s):  
Yi-Ming Jing ◽  
You-Xuan Zheng ◽  
Jing-Lin Zuo
Keyword(s):  
Current Efficiency ◽  
Power Efficiency ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Iridium Complex ◽  
Device Structure ◽  
Light Emitting ◽  
Organic Light ◽  
Device Structures ◽  
Maximum Current

Organic light-emitting diodes based on an iridium complex using different device structure show high performances with a maximum current efficiency of 86.5 cd A−1and a maximum power efficiency of 52.2 lm W−1, respectively.

Plastic Multilayered Molecular Organic Light Emitting Diodes

1997 ◽  
Vol 488 ◽  
Author(s):  
George M. Daly ◽  
Hideyuki Murata ◽  
Charles D. Merritt ◽  
Zakya H. Kafafi ◽  
Hiroshi Inada ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Power Efficiency ◽  
Light Emitting Diodes ◽  
Hole Transport ◽  
Organic Light Emitting Diodes ◽  
Electron Transport Layer ◽  
Light Emitting ◽  
Organic Light ◽  
Device Structures ◽  
External Quantum Yield

AbstractEnhanced performance has been observed for plastic molecular organic light emitting diodes (MOLEDs) consisting of two to four organic layers sequentially vacuum vapor deposited onto patterned indium-tin oxide (ITO) on polyester films. For all device structures studied, the performance of plastic diodes is comparable to or better than their analogs on glass substrates. At 100 A/m2, a luminous power efficiency of 4.4 lm/W and external quantum yield of 2.7% are measured for a device structure consisting of two hole transport layers, a doped emitting layer and an electron transport layer on a polyester substrate. The same device made on a silica substrate has a luminous power efficiency of 3.5 lm/W and external quantum yield of 2.3%. Electrical and optical performance for comparable device structures has been characterized by current-voltage-luminance measurements and electroluminescence spectra collected normal to the emitting surface. In addition, an integrating sphere was used to collect the total light emitted and to determine the optical output coupling on glass versus plastic substrates.

Power-efficient solution-processed red organic light-emitting diodes based on an exciplex host and a novel phosphorescent iridium complex

2016 ◽  
Vol 4 (24) ◽  
pp. 5787-5794 ◽  
Author(s):  
Xuejing Liu ◽  
Bing Yao ◽  
Zilong Zhang ◽  
Xiaofei Zhao ◽  
Baohua Zhang ◽  
...  
Keyword(s):  
Power Efficiency ◽  
Efficient Solution ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Iridium Complex ◽  
Solution Processed ◽  
Power Efficient ◽  
Light Emitting ◽  
Organic Light ◽  
Cie Coordinates

A novel red heteroleptic iridium complex, Ir(DPA-Flpy-CF3)2acac, was synthesized and whose corresponding solution-processed PhOLED shows a record power efficiency of 44.5 lm W−1 with CIE coordinates of (0.64, 0.36).

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.

Efficient white organic light-emitting diodes with double co-host emitting layers

2018 ◽  
Vol 6 (37) ◽  
pp. 9890-9896 ◽  
Author(s):  
Ping Chen ◽  
Ren Sheng ◽  
Man-Ying Ko ◽  
Yu Duan ◽  
Gang Cheng ◽  
...  
Keyword(s):  
High Power ◽  
Power Efficiency ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Simple Device ◽  
Device Structure ◽  
Light Emitting ◽  
Organic Light ◽  
High Power Efficiency

WOLEDs with high power efficiency are achieved by the combination of emitting iridium(iii) and platinum(ii) complexes in a simple device structure.

Strong circularly polarized electroluminescence based on chiral salen-Zn(ii) complex monomer chromophores

2019 ◽  
Vol 3 (5) ◽  
pp. 867-873 ◽  
Author(s):  
Yihan Chen ◽  
Xiaojing Li ◽  
Nengquan Li ◽  
Yiwu Quan ◽  
Yixiang Cheng ◽  
...  
Keyword(s):  
Current Efficiency ◽  
Power Efficiency ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Maximum Brightness ◽  
Light Emitting ◽  
Circularly Polarized ◽  
Organic Light

Circularly polarized organic light-emitting diodes were fabricated by using salen-Zn(ii) complex enantiomers (R-/S-ZnL) as the emitting layer, obtaining 1000 cd m−2, 0.181 cd A−1 and 0.074 lm W−1 for the maximum brightness, current efficiency and power efficiency. With an electroluminescence dissymmetry factor of up to +0.05/−0.05.

Small organic molecules based on oxazole/thiazole with excellent performances in green and red phosphorescent organic light-emitting diodes

RSC Advances ◽  
2016 ◽  
Vol 6 (57) ◽  
pp. 51575-51582 ◽  
Author(s):  
Guojian Tian ◽  
Xiang Wei ◽  
Ning Xiang ◽  
Jinhai Huang ◽  
Jin Cao ◽  
...  
Keyword(s):  
Current Efficiency ◽  
Organic Molecules ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Small Organic Molecules ◽  
Light Emitting ◽  
Organic Light ◽  
Host Materials ◽  
Maximum Current

Four small organic host materials based on oxazole/thiazole have been synthesized and fully characterized. The best performance of compound 2d was a maximum current efficiency of 50.7 cd A−1 for green device and a maximum current efficiency of 18.7 cd A−1 for red device.

Bis(benzothiophene-S,S-dioxide) fused small molecules realize solution-processible, high-performance and non-doped blue organic light-emitting diodes

2020 ◽  
Vol 8 (3) ◽  
pp. 1002-1009 ◽  
Author(s):  
Liwen Hu ◽  
Siyang Liu ◽  
Guohua Xie ◽  
Wei Yang ◽  
Bin Zhang
Keyword(s):  
Current Efficiency ◽  
Small Molecules ◽  
High Performance ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Polycyclic Aromatics ◽  
Light Emitting ◽  
Organic Light ◽  
Maximum Current

A series of solution-processible blue small molecules based on bis(benzothiophene-S,S-dioxide) fused polycyclic aromatics (FBTO) are synthesized, which show the high EL performance with the maximum current efficiency of 6.37 cd A−1.

Doped hole injection bilayers for solution processable blue phosphorescent organic light-emitting diodes

2016 ◽  
Vol 4 (27) ◽  
pp. 6570-6574 ◽  
Author(s):  
Bo Wang ◽  
Lei Zhang ◽  
Yun Hu ◽  
Xiao-Bo Shi ◽  
Zhao-Kui Wang ◽  
...  
Keyword(s):  
Current Efficiency ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Hole Injection ◽  
Solution Processed ◽  
Light Emitting ◽  
Organic Light ◽  
Maximum Current ◽  
Solution Processable ◽  
Blue Phosphorescent

A hole injection bilayer was developed for solution processed blue phosphorescent OLEDs with a maximum current efficiency of 16.7 cd A−1.

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