Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 59, Issue 40, Pages 17499-17503Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202008264
Keywords
electroluminiscence; fused aza-aromatics; hybridized multi-resonance and charge transfer; pure green emission
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Funding
- National Key Basic Research and Development Program of China [2016YFB0401003]
- National Science Fund of China [51525304, 61890942]
- China Postdoctoral Science Foundation [2019M650628]
- Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory [XHT2020-005]
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Pure green emitters are essential for realizing an ultrawide color gamut in next-generation displays. Herein, by fusing the difficult-to-access aza-aromatics onto B (boron)-N (nitrogen) skeleton, a hybridized multi-resonance and charge transfer (HMCT) molecule AZA-BN was successfully synthesized through an effective one-shot multiple cyclization method. AZA-BN shows pure green fluorescence with photoluminance quantum yield of 99.7 %. The corresponding green device exhibits a maximum external quantum efficiency and power efficiency of 28.2 % and 121.7 lm W-1, respectively, with a full width half maximum (FWHM) of merely 30 nm and Commission Internationale de l'Eclairage (CIE) coordinateyof 0.69, representing the purest green bottom-emitting organic light-emitting diode.
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