Issue 7, 2020

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

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

Supplementary files

Article information

Article type
Research Article
Submitted
28 Mar 2020
Accepted
13 May 2020
First published
15 May 2020
This article is Open Access
Creative Commons BY license

Mater. Chem. Front., 2020,4, 2018-2022

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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