Molecular evolution of host materials by regular tuning of n/p ratio for high-performance phosphorescent organic light-emitting diodes

2018 ◽  
Vol 6 (29) ◽  
pp. 7839-7846 ◽  
Author(s):  
Di Liu ◽  
Fang Wang ◽  
Ruijuan Yao
Keyword(s):  
Molecular Evolution ◽  
High Performance ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Molar Ratio ◽  
Light Emitting ◽  
Turn On ◽  
Organic Light ◽  
Host Materials ◽  
Single Host

By gradually increasing the n/p molar ratio to 2 : 1, the obtained bipolar host material exhibits a turn-on voltage of 2.6 V and an efficiency of 48.1 lm W−1, which is the lowest turn-on voltage and one of the highest power efficiencies ever reported for FIrpic devices containing a single host.

scholarly journals Oxadiazole derivatives as bipolar host materials for high-performance blue and green phosphorescent organic light-emitting diodes

RSC Advances ◽  
2019 ◽  
Vol 9 (55) ◽  
pp. 32010-32016
Author(s):  
Yanming Wang ◽  
Keke Duan ◽  
Guoxiang Li ◽  
Gewen Yu
Keyword(s):  
Charge Transport ◽  
High Performance ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light ◽  
Host Materials ◽  
Oxadiazole Derivatives

A high performance blue OLED has been realized by adjusting the ratio of n-type groups of the molecule and obtaining more balanced charge transport.

Diphenylamine/triazine hybrids as bipolar hosts for phosphorescent organic light-emitting diodes

2020 ◽  
Vol 8 (13) ◽  
pp. 4461-4468 ◽  
Author(s):  
Yaxing Zhang ◽  
Yuanyuan Zheng ◽  
Binyan Wang ◽  
Huijuan Ran ◽  
Xiaoli Wang ◽  
...  
Keyword(s):  
High Performance ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light ◽  
Host Materials

Bipolar host materials employing diphenylamine as a donor unit and triazine as an acceptor unit have been developed for high performance phosphorescent organic light-emitting diodes.

Dispirocycles: Platforms for the Construction of High‐Performance Host Materials for Phosphorescent Organic Light‐Emitting Diodes

2019 ◽  
Vol 25 (27) ◽  
pp. 6788-6796 ◽  
Author(s):  
Xiang‐Yang Liu ◽  
Yi‐Jie Zhang ◽  
Xiyu Fei ◽  
Man‐Keung Fung ◽  
Jian Fan
Keyword(s):  
High Performance ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light ◽  
Host Materials

Low-driving-voltage sky-blue phosphorescent organic light-emitting diodes with bicarbazole-bipyridine bipolar host materials

2021 ◽  
Author(s):  
Deli Li ◽  
Di Liu ◽  
Jiuyan Li ◽  
Ruizhi Dong ◽  
Botao Liu ◽  
...  
Keyword(s):  
High Efficiency ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Driving Voltage ◽  
Light Emitting ◽  
Turn On ◽  
Organic Light ◽  
Host Materials ◽  
Blue Phosphorescent

Two bipolar host containing bipyridine and bicarbazole exhibited rapid and balanced charge transportation, which resulting the extremely low turn-on voltages of 2.3 and 2.4 V, respectively, and the high efficiency of 23.7% and 52.6 lm W−1.

Direct silicon–nitrogen bonded host materials with enhanced σ–π conjugation for blue phosphorescent organic light-emitting diodes

2016 ◽  
Vol 4 (42) ◽  
pp. 10047-10052 ◽  
Author(s):  
Huanhuan Li ◽  
Lijia Xu ◽  
Yuting Tang ◽  
Ye Tao ◽  
Shen Xu ◽  
...  
Keyword(s):  
High Performance ◽  
Light Emitting Diodes ◽  
Optoelectronic Properties ◽  
Organic Light Emitting Diodes ◽  
Molecular Architecture ◽  
Light Emitting ◽  
Organic Light ◽  
Host Materials ◽  
Blue Phosphorescent

High-performance host materials have been designed in the π–σ–π molecular architecture via N–Si–N bonding with increased d-orbital participation of silicon for enhanced σ–π conjugation and improved optoelectronic properties.

Multifunctional pyridine styrylphenanthroimidazoles: Electron transport materials for blue FOLEDs with low efficiency roll-off and host for PHOLEDs with low turn-on voltage

2021 ◽  
Author(s):  
Jayaraman Jayabharathi ◽  
Sekar Sivaraj ◽  
Venugopal Thanikachalam ◽  
Jagathratchagan Anudeebhana
Keyword(s):  
Electron Transport ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Turn On ◽  
Organic Light ◽  
Host Materials ◽  
Low Efficiency

We have reported pyridine styrylphenanthroimidazole derivatives, SPPI-C2Py, SPPI-N1Py and SPPI-C2N1Py as efficient electron transport materials (ETMs) for blue fluorescent OLEDs (FOLEDs) and host materials for phosphorescent organic light emitting diodes...

scholarly journals Dual n-type units including pyridine and diphenylphosphine oxide: effective design strategy of host materials for high-performance organic light-emitting diodes

2016 ◽  
Vol 7 (11) ◽  
pp. 6706-6714 ◽  
Author(s):  
Wei Li ◽  
Jiuyan Li ◽  
Di Liu ◽  
Deli Li ◽  
Dan Zhang
Keyword(s):  
High Performance ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Diphenylphosphine Oxide ◽  
Light Emitting ◽  
Organic Light ◽  
Host Materials ◽  
Novel Host ◽  
Improved Performance ◽  
Effective Design

The direct linking of dual n-type units is developed to design novel host materials for improved performance of blue and green phosphorescent organic light-emitting diodes.

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