Journal
ORGANIC LETTERS
Volume 23, Issue 3, Pages 958-962Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.orglett.0c04159
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Funding
- National Natural Science Foundation of China [61961160731, 51773141, 51873139]
- Natural Science Foundation of Jiangsu Province of China [BK20181442]
- Collaborative Innovation Center of Suzhou Nano Science Technology
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- 111 Project of The State Administration of Foreign Experts Affairs of China
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Three emissive bridged-triphenylamine derivatives incorporating carbon, oxygen, and sulfur atoms with two carbonyl groups exhibit potential as narrowband thermally activated delayed fluorescence emitters. Organic light-emitting diodes based on these derivatives achieve high external quantum efficiencies for blue, green, and yellow emissions.
Three emissive bridged-triphenylamine derivatives are designed and synthesized by incorporating carbon (DQAO), oxygen (OQAO), and sulfur (SQAO) atoms with two carbonyl groups. The fully bridged geometry and unique frontier molecular orbital distribution reveal its potential as narrowband thermally activated delayed fluorescence emitters. DQAO-, OQAO-, and SQAO-based organic light-emitting diodes exhibit the maximum external quantum efficiency (EQE(max)) of 15.2%, 20.3%, and 17.8% for blue, green, and yellow, respectively.
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