Molecular asymmetry and rigidification as strategies to activate and enhance thermally activated delayed fluorescence in deep-blue MR-TADF emitters

Two novel deep-blue multi-resonance thermally activated delayed fluorescence (MR-TADF) emitters, 1B-CzCrs and 2B-CzCrs, containing a fused carbazole unit were synthesized. The carbazole contributed to the emergence of TADF in these small molecules. Particularly, organic light-emitting diodes with 1B...

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Published inPhysical chemistry chemical physics : PCCP Vol. 26; no. 32; pp. 21337 - 21341
Main Authors Weerasinghe, Rangani Wathsala, dos Santos, John Marques, Chitose, Youhei, Matulaitis, Tomas, Warriner, Stuart L, Barman, Debasish, Chan, Chin-Yiu, Tsuchiya, Youichi, Zysman-Colman, Eli, Adachi, Chihaya
Format Journal Article
LanguageEnglish
Published England Royal Society of Chemistry 14.08.2024
Subjects
Carbazoles
Chemical synthesis
Emitters
Fluorescence
Organic light emitting diodes
Quantum efficiency
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Summary:Two novel deep-blue multi-resonance thermally activated delayed fluorescence (MR-TADF) emitters, 1B-CzCrs and 2B-CzCrs, containing a fused carbazole unit were synthesized. The carbazole contributed to the emergence of TADF in these small molecules. Particularly, organic light-emitting diodes with 1B-CzCrs doped in the mCP host achieve a maximum external quantum efficiency of 12.8% at CIE coordinates of (0.146, 0.062). Two novel deep-blue multi-resonance thermally activated delayed fluorescence (MR-TADF) emitters, 1B-CzCrs and 2B-CzCrs, containing a fused carbazole unit were synthesized.
Bibliography:https://doi.org/10.1039/d4cp02664k
Electronic supplementary information (ESI) available. See DOI
ObjectType-Article-1
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ISSN:1463-9076
1463-9084
1463-9084
DOI:10.1039/d4cp02664k