Abstract
Spectral characteristics and luminescence under the photo- and electro-excitation of substituted dibenzthiophene sulfone and phenanthridine were studied in this paper. Diphenylamines are substituents introduced in the 2nd and 7th positions (linear configuration) or the 3rd and 6th positions (angular configuration) of dibenzthiophene sulfone or phenanthridine. All molecules show delayed fluorescence, both in solutions and films produced by thermal vacuum deposition. The value of the energy gap between the S1 and T1 states has been estimated and is shown to depend not only on the spatial arrangement of the fragments among themselves (linear or angular), but also on the nature of the substituent in diphenylamine. The highest electroluminescence brightness was found for the molecules, in which triplet levels are involved, both through the process of triplet-triplet annihilation and through thermally activated delayed fluorescence.
Highlights
Organic molecules, which emit light in the field of applied voltage, have been widely used to create organic light-emitting diodes (OLEDs) in recent decades
The highest electroluminescence brightness was found for the molecules, in which triplet levels are involved, both through the process of triplet-triplet annihilation and through thermally activated delayed fluorescence
L1 and A1 compounds have the same fragments in the molecular structure: the electron-acceptor dibenzothiophene-S,S-dioxide and two electrondonating diphenylamine fragments connected to the central fragment via meta- and para-positions with respect to the SO2 group
Summary
Organic molecules, which emit light in the field of applied voltage, have been widely used to create organic light-emitting diodes (OLEDs) in recent decades. The spectral properties of the compounds were studied in solutions of ethanol, chloroform and films obtained by thermal vacuum deposition on quartz base surfaces (TVD).
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
