Carbazole and Benzophenone Based Twisted Donor–Acceptor Systems as Solution Processable Green Thermally Activated Delayed Fluorescence Organic Light Emitters

2018 ◽  
Vol 47 (9) ◽  
pp. 1236-1239
Author(s):  
Keita Tani ◽  
Toru Yashima ◽  
Kanae Miyanaga ◽  
Kazushige Hori ◽  
Kenta Goto ◽  
...  
Keyword(s):  
Delayed Fluorescence ◽  
Light Emitters ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated ◽  
Organic Light ◽  
Donor Acceptor ◽  
Solution Processable

scholarly journals Dibenzo[a,j]phenazine-Cored Donor-Acceptor-Donor Compounds as Green-to-Red/NIR Thermally Activated Delayed Fluorescence Organic Light Emitters

2016 ◽  
Vol 128 (19) ◽  
pp. 5833-5838 ◽  
Author(s):  
Przemyslaw Data ◽  
Piotr Pander ◽  
Masato Okazaki ◽  
Youhei Takeda ◽  
Satoshi Minakata ◽  
...  
Keyword(s):  
Delayed Fluorescence ◽  
Light Emitters ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated ◽  
Organic Light ◽  
Donor Acceptor

Asymmetric Sky-Blue Thermally Activated Delayed Fluorescence Emitters Bearing Tris(triazolo)triazine Moiety for Solution Processable Organic Light-Emitting Diodes

2022 ◽  
Author(s):  
Zhou Fang ◽  
Shengyue Wang ◽  
Junxu Liao ◽  
Xinrui Chen ◽  
Yuanyuan Zhu ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Delayed Fluorescence ◽  
Organic Light Emitting Diodes ◽  
Solution Processed ◽  
Thermally Activated Delayed Fluorescence ◽  
Light Emitting ◽  
Thermally Activated ◽  
Organic Light ◽  
Solution Processable

Efficient blue thermally activated delayed fluorescence (TADF) emitter is still a challenge in solution-processed organic light-emitting diodes (OLEDs). In this contribution, two asymmetric molecules of TTT-Ac and TTT-2Ac were synthesized...

The Effect of Molecular Aggregation of Thermally Activated Delayed Fluorescence Sensitizer for Hyperfluorescence in Organic Light-Emitting Diodes

2021 ◽  
Author(s):  
Eun Young Park ◽  
Ji Hyun Park ◽  
Yun-Hi Kim ◽  
Min Chul Suh
Keyword(s):  
Resonance Effect ◽  
Delayed Fluorescence ◽  
Organic Light Emitting Diodes ◽  
Synthetic Material ◽  
Thermally Activated Delayed Fluorescence ◽  
Light Emitting ◽  
Thermally Activated ◽  
Organic Light ◽  
Phenyl Sulfone ◽  
Donor Acceptor

The exciton behavior of a new synthetic material, 11-phenyl-11H-9,16-dioxa-11-aza-4b-boraindeno[1,2-a]naphtho[3,2,1-de] anthracene (Ph-OBNA), which displays a multi-resonance effect, and bis[4-(9,9-dimethyl-9,10-dihydroacridine)phenyl]sulfone (DMAC-DPS) with a donor–acceptor-donor structure was analyzed. First, we conducted quantum mechanical...

scholarly journals Efficient Red Thermally Activated Delayed Fluorescence Emitters Based on a Dibenzonitrile-Substituted Dipyrido[3,2-a:2′,3′-c]phenazine Acceptor

Molecules ◽  
2021 ◽  
Vol 26 (9) ◽  
pp. 2427
Author(s):  
Lin He ◽  
Xuan Zeng ◽  
Weimin Ning ◽  
Ao Ying ◽  
Yunbai Luo ◽  
...  
Keyword(s):  
Transfer Characteristic ◽  
Delayed Fluorescence ◽  
Organic Light Emitting Diodes ◽  
Thermally Activated Delayed Fluorescence ◽  
Light Emitting ◽  
Thermally Activated ◽  
Organic Light ◽  
Donor Acceptor ◽  
Molecular Rigidity ◽  
Acceptor Moiety

How to construct efficient red-emitting thermally activated delayed fluorescence (TADF) materials is a challenging task in the field of organic light-emitting diodes (OLEDs). Herein, an electron acceptor moiety, 3,6-DCNB-DPPZ, with high rigidity and strong acceptor strength was designed by introducing two cyanobenzene groups into the 3,6-positions of a dipyrido[3,2-a:2′,3′-c]phenazine unit. A red-emitting compound, 3,6_R, has been designed and synthesized by combining the rigid acceptor unit with two triphenylamine donors. Due to high molecular rigidity and strong intramolecular charge transfer characteristic in donor–acceptor–donor skeleton, 3,6_R exhibited a red emission with a high photoluminescence quantum yield of 86% and distinct TADF nature with short delayed fluorescence lifetime of about 1 microsecond. Accordingly, the OLED using 3,6_R as the guest emitter gained a high external quantum efficiency of 12.0% in the red region with an electroluminescence peak of 619 nm and favorable Commission Internationale de l’Eclairage coordinates of (0.62, 0.38).

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