Thermally Activated Delayed Fluorescence Materials Based on Homoconjugation Effect of Donor–Acceptor Triptycenes

Author(s)
Chae, Hyun Sik; Kawasumi, Katsuaki; Wu, Tony C; Zhu, Tianyu; Van Voorhis, Troy; ... Show more
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Abstract
Donor–acceptor triptycences, TPA-QNX(CN)2 and TPA-PRZ(CN)2, were synthesized and their emissive properties were studied. They exhibited a blue-green fluorescence with emission lifetimes on the order of a microsecond in cyclohexane at room temperature. The long lifetime emission is quenched by O[subscript 2] and is attributed to thermally activated delayed florescence (TADF). Unimolecular TADF is made possible by the separation and weak coupling due to homoconjugation of the HOMO and LUMO on different arms of the three-dimensional donor–acceptor triptycene. Organic light emitting devices (OLEDs) were fabricated using TPA-QNX(CN)2 and TPA-PRZ(CN)2 as emitters which displayed electroluminescence with efficiencies as high as 9.4% EQE.
Date issued
2015-09
URI
http://hdl.handle.net/1721.1/107207
Department
Massachusetts Institute of Technology. Department of Chemistry; Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Journal
Journal of the American Chemical Society
Publisher
American Chemical Society (ACS)
Citation
Kawasumi, Katsuaki, Tony Wu, Tianyu Zhu, Hyun Sik Chae, Troy Van Voorhis, Marc A. Baldo, and Timothy M. Swager. “Thermally Activated Delayed Fluorescence Materials Based on Homoconjugation Effect of Donor–Acceptor Triptycenes.” Journal of the American Chemical Society 137, no. 37 (September 23, 2015): 11908–11911.
Version: Author's final manuscript
ISSN
0002-7863
1520-5126
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