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

Dianming Sun, Subeesh Madayanad Suresh, David Hall, Ming Zhang, Changfeng Si, David B. Cordes, Alexandra M.Z. Slawin, Yoann Olivier, Xiaohong Zhang, Eli Zysman-Colman

Research output: Contribution to journalArticlepeer-review

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.

Original languageEnglish
Pages (from-to)2018-2022
Number of pages5
JournalMaterials Chemistry Frontiers
Volume4
Issue number7
DOIs
Publication statusPublished - 1 Jan 2020

Fingerprint

Dive into the research topics of 'The design of an extended multiple resonance TADF emitter based on a polycyclic amine/carbonyl system'. Together they form a unique fingerprint.

Cite this