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

Résultats de recherche: Contribution à un journal/une revueArticleRevue par des pairs

Résumé

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.

langue originaleAnglais
Pages (de - à)2018-2022
Nombre de pages5
journalMaterials Chemistry Frontiers
Volume4
Numéro de publication7
Les DOIs
Etat de la publicationPublié - 1 janv. 2020

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