Highly Twisted Thermally Activated Delayed Fluorescence (TADF) Molecules and Their Applications in Organic Light‐Emitting Diodes (OLEDs)

Thermally activated delayed fluorescence (TADF) materials have attracted great potential in the field of organic light‐emitting diodes (OLEDs). Among thousands of TADF materials, highly twisted TADF emitters have become a hotspot in recent years. Compared with traditional TADF materials, highly twis...

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Bibliographic Details
Published in:Angewandte Chemie International Edition 2023-09, Vol.62 (39), p.e202301896-n/a
Main Authors: Zhang, Tiantian, Xiao, Yuxin, Wang, Hailan, Kong, Shuting, Huang, Rongjuan, Ka‐Man Au, Vonika, Yu, Tao, Huang, Wei
Format: Article
Language:English
Subjects:
Charge Transfer
Emitters
Excitons
Fluorescence
Highly Twisted Molecular Structure
Molecular structure
Organic light emitting diodes
Organic Light-Emitting Diode
Thermally Activated Delayed Fluorescence
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Summary:Thermally activated delayed fluorescence (TADF) materials have attracted great potential in the field of organic light‐emitting diodes (OLEDs). Among thousands of TADF materials, highly twisted TADF emitters have become a hotspot in recent years. Compared with traditional TADF materials, highly twisted TADF emitters tend to show multi‐channel charge‐transfer characters and form rigid molecular structures. This is advantageous for TADF materials, as non‐radiative decay processes can be suppressed to facilitate efficient exciton utilization. Accordingly, OLEDs with excellent device performances have also been reported. In this Review, we have summarized recent progress in highly twisted TADF materials and related devices, and give an overview of the molecular design strategies, photophysical studies, and the performances of OLED devices. In addition, the challenges and perspectives of highly twisted TADF molecules and the related OLEDs are also discussed. Highly twisted thermally activated delayed fluorescence emitters tend to show multi‐channel charge‐transfer character and form rigid molecular structures. This Review discusses and summarizes recent research progress in this domain, mainly covering the molecular design strategies and photophysical properties of twisted molecules, as well as the performance parameters of related OLED devices.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.202301896