A New Entry to Purely Organic Thermally Activated Delayed Fluorescence Emitters Based on Pyrido[2,3‐b]pyrazine–Dihydrophenazasilines Donor–Acceptor Dyad

Tsuyoshi Goya, Paola Zimmermann Crocomo, Takumi Hosono, Satoshi Minakata, Leonardo Evaristo de Sousa, Piotr de Silva*, Przemyslaw Data*, Youhei Takeda*

*Corresponding author for this work

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Abstract

A new family of thermally activated delayed fluorescence (TADF) emitters based on a twisted donor–acceptor (D–A) dyad scaffold comprising of dihydrophenazasiline (D) and pyrido[2,3-b]pyrazine (A) has been developed, and their properties have been investigated. Time-resolved spectroscopic analysis in matrices revealed the detailed photophysical properties of the D–A compounds. These D–A compounds serve as the emitter for organic light-emitting diodes (OLEDs), showing a moderate external quantum efficiency (EQE) up to 9% in CBP matrix. Furthermore, theoretical calculations uncovered the excited states nature of the developed TADF emitters.
Original languageEnglish
Article numbere202100780
JournalAsian Journal of Organic Chemistry
Volume11
Issue number3
Number of pages7
ISSN2193-5807
DOIs
Publication statusPublished - 2022

Keywords

  • Thermally activated delayed fluorescence
  • Donor-acceptor
  • Charge-transfer
  • OLED
  • Azaheterocycle

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