Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 9, Issue 43, Pages 37864-37872Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b09351
Keywords
quantum efficiency; delayed fluorescence; indolocarbazole; blue device; acceptor
Funding
- National Research Foundation of Korea (NRF) - Ministry of Science, ICT, and Future Planning [NRF-2016R1A2B3008845]
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Unconventional blue thermally activated delayed fluorescent emitters having electron-donating type indolocarbazole as an acceptor were developed by attaching carbazolylcarbazole or acridine donors to the indolocarbazole acceptor. Three compounds were derived from the indolocarbazole acceptor. The indolocarbazole-acridine combined products showed efficient delayed fluorescent behavior and a high quantum efficiency of 19.5% with a color coordinate of (0.15, 0.16) when they were evaluated as thermally activated delayed fluorescent emitters in deep blue fluorescent devices. This is the first demonstration of the use of electron-donating carbazole-derived moieties as efficient acceptor units of blue thermally activated delayed fluorescent emitters.
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