Improved hole-transporting properties of Ir complex-doped organic layer for high-efficiency organic light-emitting diodes

2013 ◽  
Vol 14 (1) ◽  
pp. 124-130 ◽  
Author(s):  
Yanfang Lv ◽  
Pengchao Zhou ◽  
Na Wei ◽  
Kuijuan Peng ◽  
Jianning Yu ◽  
...  
Keyword(s):  
High Efficiency ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Organic Layer ◽  
Light Emitting ◽  
Organic Light ◽  
Hole Transporting

scholarly journals High efficiency blue organic light-emitting diodes with below-bandgap electroluminescence

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Maria Vasilopoulou ◽  
Abd. Rashid bin Mohd Yusoff ◽  
Matyas Daboczi ◽  
Julio Conforto ◽  
Anderson Emanuel Ximim Gavim ◽  
...  
Keyword(s):  
High Efficiency ◽  
Light Emitting Diodes ◽  
High Mobility ◽  
Organic Light Emitting Diodes ◽  
Triplet Energy ◽  
Material Interface ◽  
Light Emitting ◽  
Thermally Activated ◽  
Organic Light ◽  
Hole Transporting

AbstractBlue organic light-emitting diodes require high triplet interlayer materials, which induce large energetic barriers at the interfaces resulting in high device voltages and reduced efficiencies. Here, we alleviate this issue by designing a low triplet energy hole transporting interlayer with high mobility, combined with an interface exciplex that confines excitons at the emissive layer/electron transporting material interface. As a result, blue thermally activated delay fluorescent organic light-emitting diodes with a below-bandgap turn-on voltage of 2.5 V and an external quantum efficiency (EQE) of 41.2% were successfully fabricated. These devices also showed suppressed efficiency roll-off maintaining an EQE of 34.8% at 1000 cd m−2. Our approach paves the way for further progress through exploring alternative device engineering approaches instead of only focusing on the demanding synthesis of organic compounds with complex structures.

High-efficiency fluorescent white organic light-emitting diodes using double hole-transporting-layers

2008 ◽  
Author(s):  
Jwo-Huei Jou ◽  
Shih-Ming Shen ◽  
Cheng-Chung Chen ◽  
Yu-Chiao Chung ◽  
Chun-Jan Wang ◽  
...  
Keyword(s):  
High Efficiency ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light ◽  
Hole Transporting

Hole-transporting-layer-free high-efficiency fluorescent blue organic light-emitting diodes

2007 ◽  
Vol 91 (4) ◽  
pp. 043504 ◽  
Author(s):  
Jwo-Huei Jou ◽  
Po-Hsuan Chiang ◽  
Yu-Pu Lin ◽  
Chin-Yeh Chang ◽  
Chun-Liang Lai
Keyword(s):  
High Efficiency ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light ◽  
Hole Transporting

Hole-transporting materials for organic light-emitting diodes: an overview

2019 ◽  
Vol 7 (24) ◽  
pp. 7144-7158 ◽  
Author(s):  
Shahnawaz Shahnawaz ◽  
Sujith Sudheendran Swayamprabha ◽  
Mangey Ram Nagar ◽  
Rohit Ashok Kumar Yadav ◽  
Sanna Gull ◽  
...  
Keyword(s):  
Charge Carrier ◽  
Crucial Role ◽  
High Efficiency ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light ◽  
Hole Transporting ◽  
Hole Transporting Materials ◽  
Recombination Zone

Hole transporting layer plays a crucial role to realize high efficiency and long lifespan by balancing the charge carrier into the desired recombination zone.

High-efficiency, long-lifetime deep-blue organic light-emitting diodes

2021 ◽  
Vol 15 (3) ◽  
pp. 208-215 ◽  
Author(s):  
Soon Ok Jeon ◽  
Kyung Hyung Lee ◽  
Jong Soo Kim ◽  
Soo-Ghang Ihn ◽  
Yeon Sook Chung ◽  
...  
Keyword(s):  
High Efficiency ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Deep Blue ◽  
Organic Light ◽  
Long Lifetime

High-efficiency red, green and blue phosphorescent homojunction organic light-emitting diodes based on bipolar host materials

2011 ◽  
Vol 12 (5) ◽  
pp. 843-850 ◽  
Author(s):  
Chao Cai ◽  
Shi-Jian Su ◽  
Takayuki Chiba ◽  
Hisahiro Sasabe ◽  
Yong-Jin Pu ◽  
...  
Keyword(s):  
High Efficiency ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light ◽  
Host Materials ◽  
Blue Phosphorescent
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