TY - JOUR
T1 - Thermally activated delayed fluorescence in dibenzothiophene sulfone derivatives
T2 - Theory and experiment
AU - Gadirov, R. M.
AU - Valiev, R. R.
AU - Samsonova, L. G.
AU - Degtyarenko, K. M.
AU - Izmailova, N. V.
AU - Odod, A. V.
AU - Krasnikova, S. S.
AU - Yakushchenko, I. K.
AU - Kopylova, T. N.
N1 - Funding Information:
The research was carried out at the expense of the grant from Russian Science Foundation (project No. 17-73-20012 ).
Publisher Copyright:
© 2019
Copyright:
Copyright 2019 Elsevier B.V., All rights reserved.
PY - 2019/2/16
Y1 - 2019/2/16
N2 - 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.
AB - 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.
KW - Intersystem crossing
KW - Organic light emitting device
KW - Spin-orbit coupling
KW - Thermally activated delayed fluorescence
KW - Transition electroluminescence
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U2 - 10.1016/j.cplett.2019.01.014
DO - 10.1016/j.cplett.2019.01.014
M3 - Article
AN - SCOPUS:85060271980
VL - 717
SP - 53
EP - 58
JO - Chemical Physics Letters
JF - Chemical Physics Letters
SN - 0009-2614
ER -