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An excited state managing molecular design platform of blue thermally activated delayed fluorescence emitters by π-linker engineering

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Abstract

A molecular design platform of blue thermally activated delayed fluorescence (TADF) emitters to boost the external quantum efficiency and efficiency roll-off of blue TADF organic light-emitting diodes (OLEDs) was developed. A molecular structure hiring one or two excited state controlling subunits in the π-linker between a donor and an acceptor was employed. The subunit in the π-linker was a phenyl unit to precisely control the performances of TADF devices. It was described that the phenyl subunit simultaneously improved the external quantum efficiency and efficiency roll-off of TADF OLEDs. A high external quantum efficiency of 28.5% was demonstrated using the material design having two phenyl sub units.

Graphical abstract: An excited state managing molecular design platform of blue thermally activated delayed fluorescence emitters by π-linker engineering

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Article information


Submitted
10 Oct 2019
Accepted
11 Dec 2019
First published
02 Jan 2020

J. Mater. Chem. C, 2020, Advance Article
Article type
Paper

An excited state managing molecular design platform of blue thermally activated delayed fluorescence emitters by π-linker engineering

K. H. Lee, S. O. Jeon, Y. S. Chung, M. Numata, H. Lee, E. K. Lee, E. S. Kwon, M. Sim, H. Choi and J. Y. Lee, J. Mater. Chem. C, 2020, Advance Article , DOI: 10.1039/C9TC05550A

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