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

31 May 2024, Version 1
Working Paper
This content is a preprint and has not undergone peer review at the time of posting.

Abstract

Two novel deep-blue multi-resonant thermally activate delayed fluorescnece (MR-TADF) emitters, 1B-CzCrs and 2B-CzCrs, containing a 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 mCP host achieve a maximum external quantum efficiency of 12.8% at CIE coordinates of (0.146, 0.062).

Keywords

MR-TADF
multiresonant thermally activated delayed fluorescence
deep-blue
asymmetric
spin-orbit coupling
efficiency
boron

Supplementary materials

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Version History

May 31, 2024 Version 1

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The content is available under CC BY 4.0 [opens in a new tab]

DOI

10.26434/chemrxiv-2024-b9fgn
D O I: 10.26434/chemrxiv-2024-b9fgn [opens in a new tab]

Funding

Japan Society for the Promotion of Science
23H05406
Japan Society for the Promotion of Science
23K20039
JST Crest
JPMJCR22B3
Engineering and Physical Sciences Research Council
EP/R035164/1
Engineering and Physical Sciences Research Council
EP/W007517/1
City University of Hong Kong
9610637
City University of Hong Kong
9231531

Author’s competing interest statement

The author(s) have declared they have no conflict of interest with regard to this content

Ethics

The author(s) have declared ethics committee/IRB approval is not relevant to this content

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