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Color tuning of mul...
Color tuning of multi-resonant thermally activated delayed fluorescence emitters based on fully fused polycyclic amine/carbonyl frameworks
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- dos Santos, John Marques (author)
- Organic Semiconductor Centre, EaStCHEM School of Chemistry, University of St Andrews, St Andrews, United Kingdom
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- Chan, Chin-Yiu (author)
- Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, Motooka 744, Fukuoka, Nishi-ku, Japan
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- Tang, Shi (author)
- Umeå universitet,Institutionen för fysik
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- Hall, David (author)
- Organic Semiconductor Centre, EaStCHEM School of Chemistry, University of St Andrews, St Andrews, United Kingdom; Laboratory for Computational Modeling of Functional Materials, Namur Institute of Structured Matter, University of Namur, 61 Rue de Bruxelles, Namur, Belgium
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- Matulaitis, Tomas (author)
- Organic Semiconductor Centre, EaStCHEM School of Chemistry, University of St Andrews, St Andrews, United Kingdom
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- Cordes, David B. (author)
- Organic Semiconductor Centre, EaStCHEM School of Chemistry, University of St Andrews, St Andrews, United Kingdom
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- Slawin, Alexandra M. Z. (author)
- Organic Semiconductor Centre, EaStCHEM School of Chemistry, University of St Andrews, St Andrews, United Kingdom
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- Tsuchiya, Youichi (author)
- Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, Motooka 744, Fukuoka, Nishi-ku, Japan
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- Edman, Ludvig, 1967- (author)
- Umeå universitet,Institutionen för fysik
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- Adachi, Chihaya (author)
- Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, Motooka 744, Fukuoka, Nishi-ku, Japan
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- Olivier, Yoann (author)
- Laboratory for Computational Modeling of Functional Materials, Namur Institute of Structured Matter, University of Namur, 61 Rue de Bruxelles, Namur, Belgium
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- Zysman-Colman, Eli (author)
- Organic Semiconductor Centre, EaStCHEM School of Chemistry, University of St Andrews, St Andrews, United Kingdom
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(creator_code:org_t)
- Royal Society of Chemistry, 2023
- 2023
- English.
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In: Journal of Materials Chemistry C. - : Royal Society of Chemistry. - 2050-7526 .- 2050-7534. ; 11:24, s. 8263-8273
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Abstract
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- Two novel π-extended amine/carbonyl-based multi-resonance thermally activated delayed fluorescence (MR-TADF) emitters have been designed and synthesized. The two emitters are isomeric, composed of nine fused rings and show green-yellow emission. Sym-DiDiKTa and Asym-DiDiKTa possess tert-butyl groups distributed in a symmetrical and asymmetrical fashion, respectively, which significantly impact the single-crystal packing structure. The two compounds possess similar singlet-triplet energy gaps, ΔEST, of around 0.23 eV, narrowband emission characterized by a full-width at half-maximum, FWHM, of 29 nm and a photoluminescence quantum yield, ΦPL, of 70% and 53% for the symmetric and asymmetric counterparts, respectively, in toluene. Investigation in OLEDs demonstrated that the devices with Sym-DiDiKTa and Asym-DiDiKTa displayed electroluminescence maxima of 543 and 544 nm, and maximum external quantum efficiencies (EQEmax) of 9.8% and 10.5%, respectively. The maximum EQE was further improved to 19.9% by employing a hyperfluorescence strategy. We further present the first example of a neutral MR-TADF emitter incorporated in a LEC device where Sym-DiDiKTa acts as the emitter. The LEC shows a λEL at 551 nm and FWHM of 60 nm with luminance of 300 cd m−2 and a fast turn-on time of less than 2 s to 100 cd m−2
Subject headings
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
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dos Santos, John ...
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Chan, Chin-Yiu
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Tang, Shi
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Hall, David
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Matulaitis, Toma ...
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Cordes, David B.
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Slawin, Alexandr ...
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Tsuchiya, Youich ...
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Edman, Ludvig, 1 ...
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Adachi, Chihaya
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Olivier, Yoann
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Zysman-Colman, E ...
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
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and Materials Chemis ...
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Journal of Mater ...
- By the university
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Umeå University