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Issue 7, 2020
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The design of an extended multiple resonance TADF emitter based on a polycyclic amine/carbonyl system

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Abstract

The development of multiple resonance thermally activated delayed fluorescence (MR-TADF) materials possessing narrow emission spectra has attracted significant attention as emitters for high colour purity organic light emitting diodes (OLEDs). In this work, a simple design strategy is introduced to construct an MR-TADF emitter, DDiKTa, through dimerization of the known MR-TADF emitter DiKTa. This design permits concentration quenching to be largely suppressed, which is a known weakness of previously reported MR-TADF emitters. OLEDs based on DDiKTa show an EQEmax of 19% at a doping concentration of 9 wt%. The electroluminescence spectrum is red-shifted into the green, producing a rare example of a green-emitting MR-TADF OLED.

Graphical abstract: The design of an extended multiple resonance TADF emitter based on a polycyclic amine/carbonyl system

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Article information


Submitted
28 Mar 2020
Accepted
13 May 2020
First published
15 May 2020

This article is Open Access

Mater. Chem. Front., 2020,4, 2018-2022
Article type
Research Article

The design of an extended multiple resonance TADF emitter based on a polycyclic amine/carbonyl system

D. Sun, S. M. Suresh, D. Hall, M. Zhang, C. Si, D. B. Cordes, A. M. Z. Slawin, Y. Olivier, X. Zhang and E. Zysman-Colman, Mater. Chem. Front., 2020, 4, 2018
DOI: 10.1039/D0QM00190B

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