Thermally activated delayed fluorescence in dibenzothiophene sulfone derivatives: Theory and experiment

R. M. Gadirov, R. R. Valiev, L. G. Samsonova, K. M. Degtyarenko, N. V. Izmailova, A. V. Odod, S. S. Krasnikova, I. K. Yakushchenko, T. N. Kopylova

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

The photophysical properties are calculated for the dibenzothiophene sulfone substituted with various electron donor moieties:3,7-bis[N,N-di(4-tert-butylphenyl)amino]dibenzothiophene-S,S-dioxide (1L), 2,8-bis[N,N-di(4-tert-butylphenyl)amino]dibenzothiophene-S,S-dioxide (1A), and 2,8-bis[N,N-di(4 methoxyphenyl)amino]dibenzothiophene-S,S-dioxide (2A). It is shown that the linear arrangement of the electron donor substituents relative to the dibenzothiophene sulfone acceptor turns compound (1L) an efficient prompt fluorescent emitter, while the angular arrangement of the substituents decreases the efficiency of prompt fluorescence, but increases the efficiency of thermally activated delayed fluorescence (TADF). Replacing the auxiliary tert-butyl groups in the donor moieties by methoxy groups leads to an increase in kISC and kRISC. OLEDs are made with the studied compounds.

Original languageEnglish
Pages (from-to)53-58
Number of pages6
JournalChemical Physics Letters
Volume717
DOIs
Publication statusPublished - 16 Feb 2019

Keywords

  • Intersystem crossing
  • Organic light emitting device
  • Spin-orbit coupling
  • Thermally activated delayed fluorescence
  • Transition electroluminescence

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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