@article{999102abb68245f18c264d4bd59ef94f,
title = "The role of host–guest interactions in organic emitters employing MR-TADF",
abstract = "Research into organic light emitters employing multiple resonance-induced thermally activated delayed fluorescence (MR-TADF) materials is presently attracting a great deal of attention due to the potential for efficient deep-blue emission. However, the origins and mechanisms of successful TADF are unclear, as many MR-TADF materials do not show TADF behaviour in solution, but only as particular pure solids. Here, an investigation into a well-known MR-TADF material, DABNA-1, together with other new MR materials (9H-quinolino[3,2,1-kl]phenothiazin-9-one (QPO) and 9H-quinolino-[3,2,1-kl]-phenothiazin-9-one 5,5-dioxide (QP3O)), yields new insights regarding the origin of TADF. Although a material system may support the concept of MR, inefficiency in both forward and reverse intersystem crossings forbids TADF unless a suitable host material allows an exciplex-like host–emitter interaction that boosts TADF. This boosted-TADF mechanism can be generalized to any fluorescence dye that lacks TADF in the photoluminescence measurement but has a thermally accessible S1–T1 energy gap, opening the way to high-performance organic light-emitting diodes.",
author = "Xiugang Wu and Su, {Bo Kang} and Chen, {Deng Gao} and Denghui Liu and Wu, {Chi Chi} and Huang, {Zhi Xuan} and Lin, {Ta Chun} and Wu, {Cheng Ham} and Mengbing Zhu and Li, {Elise Y.} and Hung, {Wen Yi} and Weiguo Zhu and Chou, {Pi Tai}",
note = "Funding Information: X.W., D.L., M.Z. and W.Z. acknowledge financial support from the National Natural Science Foundation of China (U1663229, 52073035), the Natural Science Foundation of Jiangsu Province (SBK2021020897), the Science and Technology Project of Changzhou University (ZMF20020429), Jiangsu Provincial Talents Project of High-Level Innovation and Entrepreneurship, the Top-notch Academic Programs Project (TAPP) for Polymeric Materials Science and Technology, and The Priority Academic Program Development (PAPD) of Jiangsu Higher Education Institutions, Brand Specialty & Preponderant Discipline Construction Projects of Jiangsu Higher Education Institutions. B.-K.S., D.-G.C., C.-C.W., Z.-X.H., T.-C.L., C.-H.W., E.Y.L., W.-Y.H. and P.-T.C. acknowledge financial support from Ministry of Science and Technology (MOST), Taiwan. Publisher Copyright: {\textcopyright} 2021, The Author(s), under exclusive licence to Springer Nature Limited.",
year = "2021",
month = oct,
doi = "10.1038/s41566-021-00870-3",
language = "English",
volume = "15",
pages = "780--786",
journal = "Nature Photonics",
issn = "1749-4885",
publisher = "Nature Publishing Group",
number = "10",
}