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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

Mater. Chem. Front., 2020, Advance Article
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, Advance Article , DOI: 10.1039/D0QM00190B

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