Open AccessThermally Activated Delayed Fluorescent Gain Materials: Harvesting Triplet Excitons for Lasing
Author(s) -
Yan ChangCun,
Wang XueDong,
Liao LiangSheng
Publication year - 2022
Publication title -
advanced science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.388
H-Index - 100
ISSN - 2198-3844
DOI - 10.1002/advs.202200525
Subject(s) - lasing threshold , intersystem crossing , exciton , materials science , high gain antenna , fluorescence , optoelectronics , optics , physics , atomic physics , excited state , wavelength , quantum mechanics , singlet state
Thermally activated delayed fluorescent (TADF) materials have attracted increasing attention because of their ability to harvest triplet excitons via a reverse intersystem crossing process. TADF gain materials that can recycle triplet excitons for stimulated emission are considered for solving the triplet accumulation problem in electrically pumped organic solid‐state lasers (OSSLs). In this mini review, recent progress in TADF gain materials is summarized, and design principles are extracted from existing reports. The construction methods of resonators based on TADF gain materials are also introduced, and the challenges and perspectives for the future development of TADF gain materials are presented. It is hoped that this review will aid the advances in TADF gain materials and thus promote the development of electrically pumped OSSLs.