A Simple and Strong Electron‐Deficient 5,6‐Dicyano[2,1,3]benzothiadiazole‐Cored Donor‐Acceptor‐Donor Compound for Efficient Near Infrared Thermally Activated Delayed Fluorescence

2020 ◽  
Vol 15 (19) ◽  
pp. 3029-3036 ◽  
Author(s):  
Jakkapan Kumsampao ◽  
Chaiyon Chaiwai ◽  
Pongsakorn Chasing ◽  
Thanyarat Chawanpunyawat ◽  
Supawadee Namuangruk ◽  
...  
Keyword(s):  
Near Infrared ◽  
Delayed Fluorescence ◽  
Strong Electron ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated ◽  
Donor Acceptor

Extended π-backbone for highly efficient near-infrared thermally activated delayed fluorescence with enhanced horizontal molecular orientation

2022 ◽  
Author(s):  
Jian-Li He ◽  
Yukun Tang ◽  
Kai Zhang ◽  
Yue Zhao ◽  
Yu-Ching Lin ◽  
...  
Keyword(s):  
Molecular Orientation ◽  
Near Infrared ◽  
Delayed Fluorescence ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated ◽  
Highly Efficient ◽  
Donor Acceptor ◽  
Limited Choice

The near-infrared thermally activated delayed fluorescence (NIR-TADF) materials with emission over 700 nm were insufficiently investigated mainly due to the limited choice of strong donor/acceptor units for the molecular construction...

Novel thermally activated delayed fluorescence materials by high-throughput virtual screening: going beyond donor–acceptor design

2021 ◽  
Vol 9 (9) ◽  
pp. 3324-3333 ◽  
Author(s):  
Ke Zhao ◽  
Ömer H. Omar ◽  
Tahereh Nematiaram ◽  
Daniele Padula ◽  
Alessandro Troisi
Keyword(s):  
Virtual Screening ◽  
Quantum Chemistry ◽  
High Throughput ◽  
Delayed Fluorescence ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated ◽  
Quantum Chemistry Calculations ◽  
Donor Acceptor ◽  
Molecular Semiconductors ◽  
High Throughput Virtual Screening

125 potential TADF candidates are identified through quantum chemistry calculations of 700 molecules derived from a database of 40 000 molecular semiconductors. Most of them are new and some do not belong to the class of donor–acceptor molecules.

Highly Efficient Near‐Infrared Electrofluorescence from a Thermally‐Activated Delayed Fluorescence Molecule

2021 ◽  
Author(s):  
Umamahesh Balijapalli ◽  
Ryo Nagata ◽  
Nishiki Yamada ◽  
Hajime Nakanotani ◽  
Masaki Tanaka ◽  
...  
Keyword(s):  
Near Infrared ◽  
Delayed Fluorescence ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated ◽  
Highly Efficient

Deep-Red to Near-Infrared Thermally Activated Delayed Fluorescence in Organic Solid Films and Electroluminescent Devices

2017 ◽  
Vol 129 (38) ◽  
pp. 11683-11687 ◽  
Author(s):  
Chenglong Li ◽  
Ruihong Duan ◽  
Baoyan Liang ◽  
Guangchao Han ◽  
Shipan Wang ◽  
...  
Keyword(s):  
Near Infrared ◽  
Delayed Fluorescence ◽  
Thermally Activated Delayed Fluorescence ◽  
Electroluminescent Devices ◽  
Thermally Activated ◽  
Solid Films ◽  
Organic Solid

scholarly journals Regioisomeric Effect on the Excited-State Fate Leading to Room-Temperature Phosphorescence or Thermally Activated Delayed Fluorescence in a Dibenzophenazine-Cored Donor–Acceptor–Donor System

2021 ◽  
Author(s):  
Takumi Hosono ◽  
Nicolas Oliveira Decarli ◽  
Paola Zimmermann Crocomo ◽  
Tsuyoshi Goya ◽  
Leonardo Evaristo de Sousa ◽  
...  
Keyword(s):  
Excited State ◽  
Room Temperature ◽  
Delayed Fluorescence ◽  
Quantum Yields ◽  
Room Temperature Phosphorescence ◽  
Thermally Activated Delayed Fluorescence ◽  
Light Emitting ◽  
Thermally Activated ◽  
Donor Acceptor ◽  
Emission Behavior

Exploring design principle for switching thermally activated dealyed fluorescecne (TADF) and room temperature phosphorescence (RTP) is a fundamentally imporant research in developing triplet-mediated photofunctional organic materials. Herein systematic studies on the regioisomeric and substituents effects in a twisted donor–acceptor–donor (D–A–D) scaffold (A = dibenzo[a,j]phenazine; D = dihydrophenazasiline) on the fate of the excited state have been performed. The study revealed that the regiosiomerism clearly affects the emission behavior of the D–A–D compounds. Distinct difference in TADF, dual TADF & RTP, and dual RTP were observed, depending on the host used. Furthermore, OLED organic light-emitting diodes (OLEDs) fabricated with the developed emitters achieved high external quantum yields for RTP-based OLEDS up to 7.4%.

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