Graded doping in active layer for achievement of high brightness and efficiency organic light-emitting devices

2001 ◽  
Author(s):  
WenBao Gao ◽  
Kaixia Yang ◽  
Hongyu Liu ◽  
Jing Feng ◽  
Jingying Hou ◽  
...  
Keyword(s):  
Active Layer ◽  
High Brightness ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Organic Light ◽  
Organic Light Emitting Devices

Solution-processable cyclometalated gold(III) complexes for high-brightness phosphorescent white organic light-emitting devices

2020 ◽  
Vol 55 (23) ◽  
pp. 9686-9694
Author(s):  
Wai-Lung Cheung ◽  
Shiu-Lun Lai ◽  
Wing-Kei Kwok ◽  
Man-Chung Tang ◽  
Chin-Ho Lee ◽  
...  
Keyword(s):  
High Brightness ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Organic Light ◽  
Solution Processable ◽  
Organic Light Emitting Devices

Colour tuning of blue electroluminescence using bipolar carbazole–oxadiazole molecules in single-active-layer organic light emitting devices (OLEDs)

2012 ◽  
Vol 22 (23) ◽  
pp. 11816 ◽  
Author(s):  
Katharine E. Linton ◽  
Alison L. Fisher ◽  
Christopher Pearson ◽  
Mark A. Fox ◽  
Lars-Olof Pålsson ◽  
...  
Keyword(s):  
Active Layer ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Organic Light ◽  
Organic Light Emitting Devices ◽  
Colour Tuning

Non-doped luminescent material based organic light-emitting devices displaying high brightness under very low driving voltage

2016 ◽  
Vol 4 (29) ◽  
pp. 7013-7019 ◽  
Author(s):  
Chenglong Li ◽  
Jinbei Wei ◽  
Xiaoxian Song ◽  
Kaiqi Ye ◽  
Hongyu Zhang ◽  
...  
Keyword(s):  
Driving Voltage ◽  
Luminescent Material ◽  
High Brightness ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Organic Light ◽  
Organic Light Emitting Devices

Two phenanthro[9,10-d]imidazole (PI) derivatives, DPAA-PPI and tBuDPAA-PPI, were synthesized. The non-doped OLEDs with DPAA-PPI and tBuDPAA-PPI as emitters displayed very low driving voltages, high brightness and maximum external quantum efficiencies (EQE) of 5.2% and 4.1%, respectively.

Doping in the Mixed Layer to Achieve High Brightness and Efficiency Organic Light Emitting Devices

2002 ◽  
Vol 19 (9) ◽  
pp. 1362-1364 ◽  
Author(s):  
Gao Wen-Bao ◽  
Yang Kai-Xia ◽  
Liu Hong-Yu ◽  
Feng Jing ◽  
Liu Shi-Yong
Keyword(s):  
Mixed Layer ◽  
High Brightness ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Organic Light ◽  
Organic Light Emitting Devices

Improved Electron Injection in Organic Light Emitting Devices by Applying Thin Insulating Layers

1997 ◽  
Vol 488 ◽  
Author(s):  
R. Pairleitner ◽  
S. Tasch ◽  
G. Leising ◽  
U. Scherf
Keyword(s):  
Active Layer ◽  
Electron Injection ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Organic Light ◽  
Onset Voltage ◽  
Fabrication And Characterization ◽  
Organic Light Emitting Devices ◽  
Tunnel Injection

AbstractWe present the fabrication and characterization of organic light emitting devices (OLEDs) using thin insulating layers for improved electron injection. The OLEDs are constructed with an ITO anode and an aluminum cathode. For the active layer we use either ladder-type Polyparaphenylene (m-LPPP) or Parahexaphenyl (PHP). A thin film of an insulating material is applied between the active layer and the cathode, in order to achieve a better tunnel injection due to a higher electric field at the interface. We compared different insulating materials with various thickness. The best results are obtained by using a LiF-layer with a thickness between 10 Å and 15 Å. Thereby the onset voltage decreases and the current density in the device increases significantly.

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