Journal
POLYMER JOURNAL
Volume 49, Issue 1, Pages 197-202Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/pj.2016.82
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Funding
- KAKENHI from Japan Society for the Promotion of Science (JSPS) [15H01049, 25708032, 26620168, 15H06470]
- Canon Foundation
- Kurata Memorial Hitachi Science and Technology Foundation
- Sumitomo Electric Group CSR Foundation
- Futaba Electronics Memorial Foundation
- Foundation for the Promotion of Ion Engineering
- Grants-in-Aid for Scientific Research [15H06470, 15H01049] Funding Source: KAKEN
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Highly luminescent donor-acceptor molecules based on a phenothiazine donor unit coupled with a xanthone or benzophenone acceptor unit were developed for use in organic light-emitting diodes (OLEDs). While both molecules are almost non-luminescent in pure tetrahydrofuran (THF) solution, a strong yellow delayed fluorescence was observed upon their aggregation in THF/water mixtures or in neat films. This result demonstrates the unique aggregation-induced delayed fluorescence (AIDF) characteristics of these molecules. OLEDs using these AIDF materials as a non-doped emission layer achieved high external electroluminescence quantum efficiencies of up to 11%, which exceeds the theoretical maximum for conventional fluorescent OLEDs.
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