Effect of a twin-emitter design strategy on a previously reported thermally activated delayed fluorescence organic light-emitting diode

Ettore Crovini, Zhen Zhang, Yu Kusakabe, Yongxia Ren, Yoshimasa Wada, Bilal A. Naqvi, Prakhar Sahay, Tomas Matulaitis, Stefan Diesing, Ifor David William Samuel, Wolfgang Brutting, Katsuaki Suzuki, Hironori Kaji, Stefan Brase, Eli Zysman-Colman

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Abstract

In this work we showcase the emitter DICzTRZ in which we employed a twin-emitter design of our previously reported material, ICzTRZ. This new system presented a redshifted emission at 488 nm compared to that of ICzTRZ at 475 nm and showed a comparable photoluminescence quantum yield of 57.1% in a 20 wt% CzSi film versus 63.3% for ICzTRZ. The emitter was then incorporated within a solution-processed organic light-emitting diode that showed a maximum external quantum efficiency of 8.4%, with Commission Internationale de l’Éclairage coordinate of (0.22, 0.47), at 1 mA cm−2.
Original languageEnglish
Pages (from-to)2894-2905
Number of pages12
JournalBeilstein Journal of Organic Chemistry
Volume17
DOIs
Publication statusPublished - 8 Dec 2021

Keywords

  • TADF emitters
  • Indolocarbazole
  • Triazine
  • Dimer
  • Blue emitters
  • Orientation
  • Outcoupling effect
  • Solution-processed OLEDs

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