Recent Advances in Thermally Activated Delayed Fluorescent Polymer—Molecular Designing Strategies

Abstract

Thermally activated delayed fluorescent (TADF) materials, as the third generation of organic electroluminescent materials, have many advantages over other organic light-emitting diodes (OLEDs) materials, such as 100% internal quantum efficiency, no doping of heavy metals, and avoiding the shortages of ordinary fluorescent materials and phosphorescent materials. So it is considered to be the most competitive organic light-emitting materials, and has great application prospects in the field of OLEDs. So far, small-molecule TADF materials have achieved high quantum yield and full-color range of red, green, and blue. However, TADF polymers suitable for low-cost and easily scalable solution processing are less developed, which are confined by the preparation methods and polymers designing, and there are still challenges of increasing quantum efficiency and strengthening device performance. This review mainly summarizes different synthesis strategies of TADF polymers and the latest development in the field. Special attention is focused on illustrating the designing and structure-property relationship of TADF polymers, and finally, an outlook is given for the design and application prospect of TADF polymers in the future.

High-throughput virtual screening for organic electronics: a comparative study of alternative strategies

“…The vision of employing organic materials as active components of electrical or optical devices, put forward and very actively pursued from the 80s 1 has been remarkably fruitful with a range of products that have reached the mass market, like organic light-emitting diodes (OLEDs), 2 prototype devices that approach their more established competitors, organic photovoltaic (OPV) devices, 3 and components of flexible electronic devices like conductive inks. 4 The field has been able to renew itself and identify new challenges, such as the development of novel emissive materials (dual emission, 5 room temperature phosphorescence, 6 thermally activated delayed fluorescence (TADF) 7 ), the exploitation of multiexcitonic states (singlet fission 8 (SF) and up-conversion 9 ) and the application into novel domains like organic bioelectronics, 10 neuromorphic 11 and quantum computing. 12 The premise for the successes and the optimism about the new challenges ahead is that organic materials for electronics can be fine-tuned with exquisite precision to have the desired electronic characteristics and the processing characteristics required for fabrication.…”

Highly efficient carbazolylgold(iii) dendrimers based on thermally activated delayed fluorescence and their application in solution-processed organic light-emitting devices

“…1 The reduced production cost and material usage are advantageous over vacuum deposition for manufacturing large area displays and lighting systems. [2][3][4] Apart from traditional uorescence-based polymers, [5][6][7] there are increasing efforts on the development of phosphorescent metal-containing polymers 8,9 and thermally activated delayed uorescent (TADF) polymers, [10][11][12] mainly arising from their ability to harvest both singlet and triplet excitons for light emission, and a yield of unity for the internal quantum efficiency. However, commonly encountered problems, such as batch-to-batch reproducibility and wide molecular weight distribution associated with polymer chemistry, have remained one of the biggest challenges for commercialization.…”

Heptazine-Based π-Conjugated Materials for Light-Emitting

“…Over the last decade, considerable progress in the fields of organic light-emitting diodes (OLEDs) and photocatalysis has triggered intensive effort to develop highly efficient lightemitting materials and photocatalysts (Wu and Ma, 2016;Zhou et al, 2017;Zhou et al, 2019;Yin et al, 2020;Zhou et al, 2020). Among the many kinds of materials investigated, nitrogen-rich heptazine-based materials are highly attractive on account of intriguing photoelectronic and photocatalytic properties (Audebert et al, 2021;Wang et al, 2021).…”