Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 54, Issue 50, Pages 15231-15235Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201508270
Keywords
boron; donor-acceptor systems; electroluminescence; fluorescence; organic light-emitting diodes
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Funding
- Japan Society and the Promotion of Science (JSPS) [14J04794]
- JSPS
- Collaborative Research Program of Institute for Chemical Research, Kyoto University [2015-14]
- Grants-in-Aid for Scientific Research [25248053, 14J04794] Funding Source: KAKEN
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Triarylboron compounds have attracted much attention, and found wide use as functional materials because of their electron-accepting properties arising from the vacant p orbitals on the boron atoms. In this study, we design and synthesize new donor-acceptor triarylboron emitters that show thermally activated delayed fluorescence. These emitters display sky-blue to green emission and high photoluminescence quantum yields of 87-100% in host matrices. Organic light-emitting diodes using these emitting molecules as dopants exhibit high external quantum efficiencies of 14.0-22.8%, which originate from efficient up-conversion from triplet to singlet states and subsequent efficient radiative decay from singlet to ground states.
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