scholarly journals Rational design of perfectly oriented thermally activated delayed fluorescence emitter for efficient red electroluminescence

2020 ◽  
Author(s):  
Xuan Zeng ◽  
Yu-Hsin Huang ◽  
Shaolong Gong ◽  
Xuguang Yin ◽  
Wei-Kai Lee ◽  
...  
Keyword(s):  
Rational Design ◽  
Delayed Fluorescence ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated

Rational design of thermally activated delayed fluorescence emitters with aggregation-induced emission employing combined charge transfer pathways for fabricating efficient non-doped OLEDs

2019 ◽  
Vol 7 (30) ◽  
pp. 9413-9422 ◽  
Author(s):  
Fulong Ma ◽  
Yu Cheng ◽  
Yu Zheng ◽  
Hefang Ji ◽  
Kamran Hasrat ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Rational Design ◽  
Delayed Fluorescence ◽  
Thermally Activated Delayed Fluorescence ◽  
Aggregation Induced Emission ◽  
Thermally Activated

Achieving combined charge transfer pathways in novel thermally activated delayed fluorescence emitters with aggregation-induced emission features.

Rational design, synthesis, and characterization of a photocrosslinkable hole-transporting polymer for high performance solution-processed thermally activated delayed fluorescence OLEDs

2020 ◽  
Vol 8 (13) ◽  
pp. 4572-4579 ◽  
Author(s):  
Ji Hye Lee ◽  
Cheol Hun Jeong ◽  
Mallesham Godumala ◽  
Chae Yeong Kim ◽  
Hyung Jong Kim ◽  
...  
Keyword(s):  
High Performance ◽  
Rational Design ◽  
Delayed Fluorescence ◽  
Hole Transport ◽  
Synthesis And Characterization ◽  
Design Synthesis ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated ◽  
Hole Transporting

A new photocrosslinkable PX2Cz was successfully synthesized and used as an excellent hole transport material in green TADF-OLED.

Rational design of efficient orange-red to red thermally activated delayed fluorescence emitters for OLEDs with external quantum efficiency of up to 26.0% and reduced efficiency roll-off

2020 ◽  
Vol 8 (5) ◽  
pp. 1614-1622 ◽  
Author(s):  
Jixiong Liang ◽  
Chenglong Li ◽  
Yuanyuan Cui ◽  
Zhiqiang Li ◽  
Jiaxuan Wang ◽  
...  
Keyword(s):  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
Rational Design ◽  
Delayed Fluorescence ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated ◽  
Donor Acceptor ◽  
Low Efficiency

A class of novel donor–acceptor orange-red to red thermally activated delayed fluorescence (TADF) emitters with a maximum external quantum efficiency (EQE) of up to 26.0% and extremely low efficiency roll-off have been designed and synthesized.

Solvent Dependence of Structural Dynamics and Spin-flip Processes in 3,4,5-tri(9H-carbazole-9-yl)benzonitrile (ortho-3CzBN)

2020 ◽  
Author(s):  
Masaki Saigo ◽  
Kiyoshi Miyata ◽  
Hajime Nakanotani ◽  
Chihaya Adachi ◽  
Ken Onda
Keyword(s):  
Dft Calculations ◽  
Excited States ◽  
Structural Changes ◽  
Photophysical Properties ◽  
Delayed Fluorescence ◽  
Time Resolved ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated ◽  
Solvent Dependence ◽  
Acetonitrile Solutions

We have investigated the solvent-dependence of structural changes along with intersystem crossing of a thermally activated delayed fluorescence (TADF) molecule, 3,4,5-tri(9H-carbazole-9-yl)benzonitrile (o-3CzBN), in toluene, tetrahydrofuran, and acetonitrile solutions using time-resolved infrared (TR-IR) spectroscopy and DFT calculations. We found that the geometries of the S1 and T1 states are very similar in all solvents though the photophysical properties mostly depend on the solvent. In addition, the time-dependent DFT calculations based on these geometries suggested that the thermally activated delayed fluorescence process of o-3CzBN is governed more by the higher-lying excited states than by the structural changes in the excited states.<br>

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.

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