Carrier transport manipulation for efficiency enhancement in blue phosphorescent organic light-emitting devices with a 4,4′-bis(N-carbazolyl)-2,2′-biphenyl host

2019 ◽  
Vol 7 (30) ◽  
pp. 9301-9307 ◽  
Author(s):  
Ziwei Yu ◽  
Haiwei Feng ◽  
Jiaxin Zhang ◽  
Shihao Liu ◽  
Yi Zhao ◽  
...  
Keyword(s):  
Carrier Transport ◽  
Efficiency Enhancement ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Organic Light ◽  
Balanced Distribution ◽  
Organic Light Emitting Devices ◽  
Blue Phosphorescent

The EQE of CBP-based blue PhOLEDs is effectively enhanced by achieving a more balanced distribution of carriers in the EML.

Spirobiacridine-based Host Material for Highly Efficient Blue Phosphorescent Organic Light-emitting Devices

2020 ◽  
Vol 49 (3) ◽  
pp. 228-231 ◽  
Author(s):  
Hiroki Arai ◽  
Hisahiro Sasabe ◽  
Kohei Nakao ◽  
Yuki Masuda ◽  
Junji Kido
Keyword(s):  
Host Material ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Highly Efficient ◽  
Organic Light ◽  
Organic Light Emitting Devices ◽  
Blue Phosphorescent

Efficiency Enhancement of Tandem Organic Light-Emitting Devices Fabricated Utilizing an 1,4,5,8,9,11-Hexaazatriphenylene-Hexacarbonitrile Charge-Generation Layer

2015 ◽  
Vol 15 (10) ◽  
pp. 7717-7721
Author(s):  
Young Pyo Jeon ◽  
Tae Whan Kim
Keyword(s):  
Current Density ◽  
Efficiency Enhancement ◽  
Charge Generation ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Organic Light ◽  
Maximum Current ◽  
Organic Light Emitting Devices ◽  
Generation Mechanisms ◽  
A Charge

The electrical and the optical properties of tandem organic light-emitting devices (OLEDs) with stacked electroluminescence units were investigated to clarify the charge-generation mechanisms due to the existence of a charge-generation layer (CGL). The current density of the current limited devices with an 1,4,5,8,9,11-hexaazatriphenylene-hexacarbonitrile (HAT-CN) CGL was 35% higher than that of devices with a tungsten-oxide (WO3) CGL. The maximum current density of the current limited devices with a HAT-CN CGL was as high as 259 mA/cm2. The brightness of the tandem OLEDs with a HAT-CN CGL was 15% higher than that of the tandem OLEDs with a WO3 CGL due to an increase in the current density. The charge-generation mechanisms of tandem OLEDs with a CGL were described on the basis of the experimental results.

scholarly journals Efficiency enhancement of flexible organic light-emitting devices by using antireflection nanopillars

2011 ◽  
Vol 19 (S3) ◽  
pp. A295 ◽  
Author(s):  
Yu-Hsuan Ho ◽  
Chung-Chun Liu ◽  
Shun-Wei Liu ◽  
Hsun Liang ◽  
Chih-Wei Chu ◽  
...  
Keyword(s):  
Efficiency Enhancement ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Organic Light ◽  
Organic Light Emitting Devices

Effect of electron injection and transport materials on efficiency of deep-blue phosphorescent organic light-emitting devices

2009 ◽  
Vol 10 (4) ◽  
pp. 686-691 ◽  
Author(s):  
Sang-Hyun Eom ◽  
Ying Zheng ◽  
Edward Wrzesniewski ◽  
Jaewon Lee ◽  
Neetu Chopra ◽  
...  
Keyword(s):  
Electron Injection ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Deep Blue ◽  
Organic Light ◽  
Organic Light Emitting Devices ◽  
Blue Phosphorescent
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