Journal
MATERIALS TODAY ENERGY
Volume 21, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.mtener.2021.100792
Keywords
Small FWHM; High efficiency; Deep blue emission; Multi-resonance
Funding
- MOTIE (Ministry of Trade, Industry, and Energy) in Korea, under the Fostering Global Talentsfor Innovative Growth Program [P0008746]
- Ministry of Health & Welfare (MOHW), Republic of Korea [P0008746] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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A deep blue thermally activated delayed fluorescence (TADF) organic light-emitting diode resistant to the concentration quenching effect was developed, showing high photoluminescence quantum yield and external quantum efficiency.
A deep blue thermally activated delayed fluorescence (TADF) organic light-emitting diode resistant to the concentration quenching effect was developed using a multiresonance-type boron emitter decorated with a di(tert-butylphenyl)amine unit. The di(tert-butylphenyl)amine group surrounding the rigid core structure enabled a high photoluminescence quantum yield and fast reverse intersystem crossing of the multiresonance TADF emitter even at high doping concentrations. The multiresonance B-N type blue TADF emitter showed narrow blue emission spectrum with a full width at half maximum of 25 nm without bathochromic shift by the additional donor. It showed a high external quantum efficiency of more than 26%, a deep blue emission color of (0.13, 0.08), and a very small efficiency decrease of 2% even at high doping concentrations. (C) 2021 Elsevier Ltd. All rights reserved.
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