Thermally Activated Delayed Fluorescence Properties of Trioxoazatriangulene Derivatives Modified with Electron Donating Groups

Youichi Tsuchiya, Yuma Ishikawa, Sang Hoon Lee, Xian Kai Chen, Jean Luc Brédas, Hajime Nakanotani, Chihaya Adachi

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

With the aim of achieving high-performance thermally activated delayed fluorescence, a series of trioxoazatriangulene derivatives are systematically developed by modifying the donor substituents. The emission colors are shifted from green to greenish-yellow and to yellow with rather broad spectral widths of 70–95 nm by introducing carbazole, triphenylamine, or diphenylamine donor units, indicating that each emission originates from a charge-transfer transition. On the other hand, the trioxoazatriangulene modified with three diphenylamines shows orange emission with a narrow emission spectrum (45 nm), suggesting that the transition mainly originates from a multiple resonance effect.

Original languageEnglish (US)
Article number2002174
JournalAdvanced Optical Materials
Volume9
Issue number14
DOIs
StatePublished - Jul 10 2021
Externally publishedYes

Keywords

  • multiple resonance effect
  • thermally activated delayed fluorescence
  • trioxoazatriangulenes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

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