Pyridine linked fluorene hybrid bipolar host for blue, green, and orange phosphorescent organic light-emitting diodes toward solution processing

2017 ◽  
Vol 5 (45) ◽  
pp. 11937-11946 ◽  
Author(s):  
Shang-hui Ye ◽  
Le Li ◽  
Meng Zhang ◽  
Zhou Zhou ◽  
Mei-han Quan ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Active Group ◽  
Solution Processing ◽  
Light Emitting ◽  
Organic Light ◽  
Host Materials

Balanced charge transportation is achieved in a series of bipolar host materials based on a pyridine hybrid fluorene host containing a triphenylamine or carbazole active group.

scholarly journals Ultrahigh-efficiency solution-processed simplified small-molecule organic light-emitting diodes using universal host materials

2016 ◽  
Vol 2 (10) ◽  
pp. e1601428 ◽  
Author(s):  
Tae-Hee Han ◽  
Mi-Ri Choi ◽  
Chan-Woo Jeon ◽  
Yun-Hi Kim ◽  
Soon-Ki Kwon ◽  
...  
Keyword(s):  
Small Molecule ◽  
High Efficiency ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Solution Processing ◽  
Solution Processed ◽  
Promising Alternative ◽  
Light Emitting ◽  
Organic Light ◽  
Host Materials

Although solution processing of small-molecule organic light-emitting diodes (OLEDs) has been considered as a promising alternative to standard vacuum deposition requiring high material and processing cost, the devices have suffered from low luminous efficiency and difficulty of multilayer solution processing. Therefore, high efficiency should be achieved in simple-structured small-molecule OLEDs fabricated using a solution process. We report very efficient solution-processed simple-structured small-molecule OLEDs that use novel universal electron-transporting host materials based on tetraphenylsilane with pyridine moieties. These materials have wide band gaps, high triplet energy levels, and good solution processabilities; they provide balanced charge transport in a mixed-host emitting layer. Orange-red (~97.5 cd/A, ~35.5% photons per electron), green (~101.5 cd/A, ~29.0% photons per electron), and white (~74.2 cd/A, ~28.5% photons per electron) phosphorescent OLEDs exhibited the highest recorded electroluminescent efficiencies of solution-processed OLEDs reported to date. We also demonstrate a solution-processed flexible solid-state lighting device as a potential application of our devices.

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

Tuning peripheral group density in ternary phosphine oxide hosts for low-voltage-driven yellow PhOLEDs

2015 ◽  
Vol 3 (26) ◽  
pp. 6709-6716 ◽  
Author(s):  
Jing Li ◽  
Zhensong Zhang ◽  
Chunmiao Han ◽  
Dongxue Ding ◽  
Yi Zhao ◽  
...  
Keyword(s):  
Phosphine Oxide ◽  
Light Emitting Diodes ◽  
Low Voltage ◽  
Organic Light Emitting Diodes ◽  
Diphenylphosphine Oxide ◽  
Light Emitting ◽  
Organic Light ◽  
Host Materials ◽  
Group Density

Fluorene and diphenylphosphine oxide were employed as peripheral groups to construct ternary host materials DBFxPODEFn with benzofuran as a core, which realized the low-voltage-driven efficient yellow phosphorescence organic light-emitting diodes.

Novel spiro-based host materials for application in blue and white phosphorescent organic light-emitting diodes

2016 ◽  
Vol 37 ◽  
pp. 108-114 ◽  
Author(s):  
Lei Ding ◽  
Shuai Du ◽  
Lin-Song Cui ◽  
Fang-Hui Zhang ◽  
Liang-Sheng Liao
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light ◽  
Host Materials

Diluted exciplex concentration in organic light emitting diodes for blue-shifted spectra and improved efficiency

2022 ◽  
Author(s):  
Jiakui Yan ◽  
Bizheng Dong ◽  
Yabo Xu ◽  
Bo Zhao ◽  
Fangming Jin ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Blue Shift ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light ◽  
Host Materials ◽  
Donor Acceptor

In this work, the effects of different ratios of donor/acceptor and spacer host materials on exciplex organic light emitting diodes (OLED) based DMAC-DPS:PO-T2T were explored, an obvious spectral blue-shift and...

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