scholarly journals Photoluminescence Quenching Probes Spin Conversion and Exciton Dynamics in Thermally Activated Delayed Fluorescence Materials

2019 ◽  
Vol 31 (21) ◽  
pp. 1804490 ◽  
Author(s):  
Brett Yurash ◽  
Hajime Nakanotani ◽  
Yoann Olivier ◽  
David Beljonne ◽  
Chihaya Adachi ◽  
...  
Keyword(s):  
Delayed Fluorescence ◽  
Photoluminescence Quenching ◽  
Spin Conversion ◽  
Thermally Activated Delayed Fluorescence ◽  
Exciton Dynamics ◽  
Thermally Activated

Theoretical studies on full-color thermally activated delayed fluorescence molecules

2020 ◽  
Vol 8 (17) ◽  
pp. 5839-5846 ◽  
Author(s):  
Lei Liu ◽  
Qi Wei ◽  
Yajuan Cheng ◽  
Huili Ma ◽  
Shiyun Xiong ◽  
...  
Keyword(s):  
Delayed Fluorescence ◽  
Theoretical Studies ◽  
Efficiency Improvement ◽  
Thermally Activated Delayed Fluorescence ◽  
Exciton Dynamics ◽  
Detailed Mechanism ◽  
Thermally Activated ◽  
Full Color

This work provides a detailed mechanism for exciton dynamics in D–π–A–π–D TADF molecules and strategies for further efficiency improvement.

scholarly journals Manipulating exciton dynamics of thermally activated delayed fluorescence materials for tuning two-photon nanotheranostics

2020 ◽  
Vol 11 (3) ◽  
pp. 888-895 ◽  
Author(s):  
Ya-Fang Xiao ◽  
Jia-Xiong Chen ◽  
Shengliang Li ◽  
Wen-Wen Tao ◽  
Shuang Tian ◽  
...  
Keyword(s):  
Energy Flow ◽  
Fluorescence Emission ◽  
Delayed Fluorescence ◽  
Thermally Activated Delayed Fluorescence ◽  
Exciton Dynamics ◽  
Oxygen Generation ◽  
Efficient Energy ◽  
Thermally Activated ◽  
Two Photon ◽  
Singlet Oxygen Generation

Exciton dynamics can be manipulated rationally in the design of TADF materials for nanotheranostics. Regulating the ΔEST and f promises efficient energy flow for tailoring balances between singlet oxygen generation and fluorescence emission.

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.

scholarly journals Molecular design of efficient yellow- to red-emissive alkynylgold(iii) complexes for the realization of thermally activated delayed fluorescence (TADF) and their applications in solution-processed organic light-emitting devices

2021 ◽  
Author(s):  
Cathay Chai Au-Yeung ◽  
Lok-Kwan Li ◽  
Man-Chung Tang ◽  
Shiu-Lun Lai ◽  
Wai-Lung Cheung ◽  
...  
Keyword(s):  
Molecular Design ◽  
Delayed Fluorescence ◽  
Solution Processed ◽  
Thermally Activated Delayed Fluorescence ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Thermally Activated ◽  
New Class ◽  
Organic Light ◽  
Tunable Emission

We report the design of a new class of fused heterocyclic alkynyl ligand-containing gold(iii) complexes, which shows tunable emission colors spanning yellow to red region and exhibits thermally activated delayed fluorescence (TADF) properties.

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