Cruciform Molecules Bearing Bis(phenylsulfonyl)benzene Moieties for High‐Efficiency Solution Processable OLEDs: When Thermally Activated Delayed Fluorescence Meets Mechanochromic Luminescence

2019 ◽  
Vol 8 (2) ◽  
pp. 1901021 ◽  
Author(s):  
Di Zhou ◽  
Chi Hyun Ryoo ◽  
Denghui Liu ◽  
Shengyue Wang ◽  
Gaowei Qian ◽  
...  
Keyword(s):  
High Efficiency ◽  
Delayed Fluorescence ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated ◽  
Solution Processable ◽  
Mechanochromic Luminescence

New hole transport styrene polymers bearing highly π-extended conjugated side-chain moieties for high-performance solution-processable thermally activated delayed fluorescence OLEDs

2021 ◽  
Vol 12 (11) ◽  
pp. 1692-1699
Author(s):  
Ji Hye Lee ◽  
Jinhyo Hwang ◽  
Chai Won Kim ◽  
Amit Kumar Harit ◽  
Han Young Woo ◽  
...  
Keyword(s):  
High Performance ◽  
High Efficiency ◽  
Delayed Fluorescence ◽  
Hole Transport ◽  
Side Chain ◽  
Solution Processed ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated ◽  
Turn On ◽  
Solution Processable

New polystyrene-based polymers with high π-extended hole transport pendants were synthesized to obtain a low turn-on voltage and high efficiency in solution-processed green TADF-OLEDs.

Triazatruxene-based small molecules with thermally activated delayed fluorescence, aggregation-induced emission and mechanochromic luminescence properties for solution-processable nondoped OLEDs

2018 ◽  
Vol 6 (46) ◽  
pp. 12503-12508 ◽  
Author(s):  
Yonghong Chen ◽  
Shumeng Wang ◽  
Xiaofu Wu ◽  
Yuxiang Xu ◽  
Hua Li ◽  
...  
Keyword(s):  
Small Molecules ◽  
Delayed Fluorescence ◽  
Luminescence Properties ◽  
Thermally Activated Delayed Fluorescence ◽  
Aggregation Induced Emission ◽  
Thermally Activated ◽  
Solution Processable ◽  
Low Efficiency ◽  
Mechanochromic Luminescence

Thermally activated delayed fluorescence, aggregation-induced emission and mechanochromic luminescence properties are combined in triazatruxene-based small molecules, which exhibit low efficiency roll-off in OLED devices.

Chromenopyrazole-based bipolar host materials for solution-processable thermally activated delayed fluorescence OLEDs exhibiting high efficiency and low roll-off

2019 ◽  
Vol 55 (86) ◽  
pp. 12952-12955 ◽  
Author(s):  
Mallesham Godumala ◽  
Jiwon Yoon ◽  
Chiho Lee ◽  
Ji-Eun Jeong ◽  
Sungnam Park ◽  
...  
Keyword(s):  
Electron Acceptor ◽  
High Performance ◽  
High Efficiency ◽  
Delayed Fluorescence ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated ◽  
Host Materials ◽  
Solution Processable

With chromenopyrazole as an electron-acceptor core, two new bipolar host materials (DCzCP and TCzCP) exhibited high performance and low roll-off in solution-processable TADF-OLEDs.

Achievement of high efficiency with extremely low efficiency roll-off in solution-processed thermally activated delayed fluorescence OLEDs manufactured using xanthone-based bipolar host materials

2020 ◽  
Vol 8 (20) ◽  
pp. 6780-6787 ◽  
Author(s):  
Chae Yeong Kim ◽  
Chiho Lee ◽  
Hyung Jong Kim ◽  
Jinhyo Hwang ◽  
Mallesham Godumala ◽  
...  
Keyword(s):  
High Efficiency ◽  
Delayed Fluorescence ◽  
Structural Isomers ◽  
Solution Processed ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated ◽  
Host Materials ◽  
Solution Processable ◽  
Low Efficiency

Two bipolar hosts as structural isomers were designed and synthesized for solution-processable green TADF-OLEDs. Corresponding devices showed excellent EQE over 21% and low efficiency roll-off.

Pyrimidine-based bipolar host materials for high efficiency solution processed green thermally activated delayed fluorescence OLEDs

2020 ◽  
Vol 8 (6) ◽  
pp. 2196-2204 ◽  
Author(s):  
Jiwon Yoon ◽  
Chiho Lee ◽  
Su Hong Park ◽  
Dong Won Kang ◽  
Hyojin Kim ◽  
...  
Keyword(s):  
High Efficiency ◽  
Delayed Fluorescence ◽  
Solution Processed ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated ◽  
Host Materials ◽  
Solution Processable

In this study, three bipolar host materials (i.e.Py2Cz, Py2BFCz, and Py2ICz) for solution-processable green-emitting TADF-OLEDs were synthesized by coupling 2,4-diphenylpyrimidine to mCP and modifying the carbazole-donating units in the mCP structure.

Electrostatic potential dispersing pyrimidine-5-carbonitrile acceptor for high efficiency and long lifetime thermally activated delayed fluorescence organic light-emitting diodes

2019 ◽  
Vol 7 (40) ◽  
pp. 12695-12703 ◽  
Author(s):  
Ji Seon Jang ◽  
Ha Lim Lee ◽  
Kyung Hyung Lee ◽  
Jun Yeob Lee
Keyword(s):  
Electrostatic Potential ◽  
High Efficiency ◽  
Delayed Fluorescence ◽  
Organic Light Emitting Diodes ◽  
Thermally Activated Delayed Fluorescence ◽  
Light Emitting ◽  
Thermally Activated ◽  
Organic Light ◽  
Long Lifetime ◽  
Acceptor Moiety

Pyrimidine-5-carbonitrile was developed as an electrostatic potential managing and strong acceptor moiety of thermally activated delayed fluorescent (TADF) emitters for high efficiency and long lifetime in devices.

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