Novel Hole-Transporting Materials with High Triplet Energy for Highly Efficient and Stable Organic Light-Emitting Diodes

2016 ◽  
Vol 120 (33) ◽  
pp. 18748-18755 ◽  
Author(s):  
Hirohiko Fukagawa ◽  
Takahisa Shimizu ◽  
Hiroyuki Kawano ◽  
Shota Yui ◽  
Toshinobu Shinnai ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Triplet Energy ◽  
Light Emitting ◽  
Highly Efficient ◽  
Organic Light ◽  
Hole Transporting ◽  
Hole Transporting Materials

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.

Solution-processable highly efficient deep-red and orange organic light-emitting diodes based on multi-functional Ir(iii) complexes

2017 ◽  
Vol 5 (38) ◽  
pp. 10029-10038 ◽  
Author(s):  
Woosum Cho ◽  
Ganguri Sarada ◽  
Athithan Maheshwaran ◽  
Yeong-Soon Gal ◽  
Yeonsig Nam ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Improve Performance ◽  
Light Emitting ◽  
Highly Efficient ◽  
Organic Light ◽  
Hole Transporting ◽  
Solution Processable

Linking the hole transporting/electron transporting functional moieties to the Ir(iii) complex is a key strategy to improve performance of PhOLEDs.

Synthesis, characterization, and hole-transporting properties of benzotriazatruxene derivatives

2019 ◽  
Vol 7 (47) ◽  
pp. 15035-15041 ◽  
Author(s):  
Tianchai Chooppawa ◽  
Supawadee Namuangruk ◽  
Hiroshi M. Yamamoto ◽  
Vinich Promarak ◽  
Paitoon Rashatasakhon
Keyword(s):  
Field Effect ◽  
Light Emitting Diodes ◽  
Field Effect Transistors ◽  
Organic Light Emitting Diodes ◽  
Organic Field Effect Transistors ◽  
Light Emitting ◽  
Organic Light ◽  
Hole Transporting ◽  
Derivatives Of ◽  
Hole Transporting Materials

Four derivatives of benzotriazatruxene are synthesized and tested as hole-transporting materials in organic field-effect transistors and organic light-emitting diodes.

Improved performance of organic light-emitting diodes using advanced hole-transporting materials

2009 ◽  
Vol 159 (23-24) ◽  
pp. 2578-2583 ◽  
Author(s):  
Seok-Hwan Hwang ◽  
Young Kook Kim ◽  
Yoonhyun Kwak ◽  
Chang-Ho Lee ◽  
Jonghyuk Lee ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light ◽  
Hole Transporting ◽  
Improved Performance ◽  
Hole Transporting Materials
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