Spectral-Luminescent and Electroluminescent Properties of Charge-transfer Systems Based On Electron-donating Diphenylamine Derivatives and Acceptors of Dibenzothiophene Sulfone and Phenanthridine

Spectral characteristics and luminescence under the photo- electro-excitation of substituted dibenzthiophene sulfone phenanthridine were studied in this paper. Diphenylamines are substituents introduced 2nd 7th positions (linear configuration) or 3rd 6th (angular phenanthridine. All molecules show delayed fluorescence, both solutions films produced by thermal vacuum deposition. The value energy gap between S1 T1 states has been estimated is shown to depend not only on spatial arrangement fragments among themselves angular), but also nature substituent diphenylamine. highest electroluminescence brightness was found for molecules, which triplet levels involved, through process triplet–triplet annihilation thermally activated fluorescence.