scholarly journals Chemical and conformational control of the energy gaps involved in the thermally activated delayed fluorescence mechanism

2018 ◽  
Vol 6 (18) ◽  
pp. 4842-4853 ◽  
Author(s):  
Paloma L. dos Santos ◽  
Marc K. Etherington ◽  
Andrew P. Monkman
Keyword(s):  
Delayed Fluorescence ◽  
Vibronic Coupling ◽  
Coupling Mechanism ◽  
Conformational Control ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated ◽  
Energy Gaps ◽  
And Control

This review summarises the significant developments in our understanding and control of thermally-activated delayed fluorescence (TADF) molecules and the spin–vibronic coupling mechanism, from which we have designed new generations of emitters.

scholarly journals Revealing the spin–vibronic coupling mechanism of thermally activated delayed fluorescence

2016 ◽  
Vol 7 (1) ◽  
Author(s):  
Marc K. Etherington ◽  
Jamie Gibson ◽  
Heather F. Higginbotham ◽  
Thomas J. Penfold ◽  
Andrew P. Monkman
Keyword(s):  
Delayed Fluorescence ◽  
Vibronic Coupling ◽  
Coupling Mechanism ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated

Controlled emission colors and singlet–triplet energy gaps of dihydrophenazine-based thermally activated delayed fluorescence emitters

2015 ◽  
Vol 3 (10) ◽  
pp. 2175-2181 ◽  
Author(s):  
Jiyoung Lee ◽  
Katsuyuki Shizu ◽  
Hiroyuki Tanaka ◽  
Hajime Nakanotani ◽  
Takuma Yasuda ◽  
...  
Keyword(s):  
Delayed Fluorescence ◽  
Triplet Energy ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated ◽  
Energy Gaps

We have developed thermally activated delayed fluorescence emitters with wide ranges of emission colors and singlet–triplet energy gaps.

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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