Projects per year
Abstract
Thermally activated delayed fluorescence (TADF) has been explored actively in luminescent organic materials. Yet, realizing such TADF-active, multifunctional emitters with high emission efficiency still remains hugely challenging. In this context, a series of twist-conjugated organic molecules bearing diphenylsulfone and 9,9-dimethylacridine moieties are designed and prepared, and are found to show, in one molecule, TADF, room-temperature phosphorescence, triboluminescence, and aggregation-induced emission enhancement. In addition, remarkably high photoluminescence quantum efficiency, up to ≈100%, is achieved for these novel molecules. Single-crystal analysis and theoretical calculations reveal that the through-space charge transfer (TSCT) effect in these molecules is responsible for both the multifunctional emission and high emission efficiency. A maximum external quantum efficiency of 20.1% is achieved, which is among the highest recorded in a solution-processable device containing TSCT-based TADF materials. These results illustrate a new approach to achieving highly efficient TADF-active, multifunctional emitters.
Original language | English |
---|---|
Article number | 2100180 |
Number of pages | 10 |
Journal | Advanced Optical Materials |
Volume | 9 |
Issue number | 15 |
Early online date | 10 May 2021 |
DOIs | |
Publication status | Published - 6 Aug 2021 |
Bibliographical note
Funding Information:B.L. and Z.Y. contributed equally to this work. Financial support was from the National Natural Science Foundation of China (Nos. 51773021, 51911530197, U1663229, and 51473140), Six talent peaks project in Jiangsu Province (XCL‐102),Natural Science Fund for Colleges and Universities in Jiangsu Province (No. 19KJA430002), and Postgraduate Research & Practice Innovation Program of Jiangsu Province (SJCX20_0977).
© 2021 Wiley-VCH GmbH. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details
Keywords
- high efficiency
- multifunctional emitters
- structure–property relationship
- thermally activated delayed fluorescence
- through-space charge transfer
Projects
- 1 Finished
-
Design, Synthesis and Device Properties of Multifunctional, Phosphorescent Metallomesogens
1/03/19 → 30/03/22
Project: Research project (funded) › Research