Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 56, Issue 47, Pages 15006-15009Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201709125
Keywords
blue emission; boron compounds; fluorescence; OLEDs; thin films
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Funding
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB20000000]
- Key Program of Frontier Science, CAS [QYZDJ-SSW-SLH033]
- National Natural Science Foundation of China [21373221, 21521061, 51672271, 21671190]
- Natural Science Foundation of Fujian Province [2006L2005]
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Two efficient blue thermally activated delayed fluorescence compounds, B-oCz and B-oTC, composed of ortho-donor (D)-acceptor (A) arrangement were designed and synthesized. The significant intramolecular D-A interactions induce a combined charge transfer pathway and thus achieve small E-ST and high efficiencies. The concentration quenching can be effectively inhibited in films of these compounds. The blue non-doped organic light emitting diodes (OLEDs) based on B-oTC prepared from solution processes shows record-high external quantum efficiency (EQE) of 19.1%.
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