Journal
JOURNAL OF MATERIALS CHEMISTRY C
Volume 4, Issue 34, Pages 7911-7916Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6tc02027e
Keywords
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Funding
- JST ACCEL project
- JSPS [15H01049, 25708032, 26620168]
- Cooperative Research Program of Network Joint Research Center for Materials and Devices
- Kurata Memorial Hitachi Science and Technology Foundation
- Sumitomo Electric Group CSR Foundation
- Futaba Electronics Memorial Foundation
- Canon Foundation
- Rotary Yoneyama Scholarships
- Grants-in-Aid for Scientific Research [15H01049, 14J03825, 25708032, 26620168] Funding Source: KAKEN
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We report here high-performance pure blue thermally activated delayed fluorescence (TADF) molecules based on a central pyrimidine acceptor (A) core with peripheral diphenylacridan donor (D) units. A design motif of highly twisted D-A-D architectures having a small singlet-triplet energy splitting allows for the production of efficient pure blue TADF with high quantum efficiencies exceeding 90%. An OLED based on the blue pyrimidine-based TADF emitter exhibits a high maximum external quantum efficiency of 20.8% and a high power efficiency of 31.5 lm W-1.
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