Modeling of the Process of Inkjet Printing of Low-Viscosity Liquids

Russian Physics Journal - An approach to inkjet printing of low-viscosity liquids is suggested consisting in suppression of undesirable weakly damped acoustic oscillations under the action of a...     

Promising Organic Active Media for Blue-Green Tunable Lasers

Russian Physics Journal - Results of investigation of spectral-luminescent and lasing characteristics of substituted 1,3-oxazoles and 1,3,4-oxadiazoles lasing in the blue-green spectral region are...     

Special Features of Photo- and Electroluminescence of Zinc and Magnesium Complexes

Russian Physics Journal - The results of spectral and luminescent study of zinc and magnesium metal complexes are presented. It is shown that radiation in mixed ligand complexes has the charge...     

Theoretical Study of the Vibronic Structure of the Absorption and Fluorescence Spectra of Thiazine Dyes

Russian Physics Journal - Theoretical modeling of changes in the vibronic absorption and fluorescence spectra in the molecules of two dyes of the thiazine series – methylene blue and...     

Increase in the Lasing Efficiency of Thin-Film Lasers Based on 1.4- Distirylbenzene

Russian Physics Journal - The possibility of development of a thin-film 1,4-distirylbenzene–based laser lasing in the blue spectral range in solutions and films is investigated. The...     

Multilayer Light-Emitting Diodes Based on Organic Semiconductor Polymers

Russian Physics Journal - Results of studying the optical and electrical characteristics of single- and two-layer polymer OLED structures with different thicknesses of radiating layers are...     

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- 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.

     

Inkjet Printing of Organic Light-Emitting Diodes Based on Alcohol-Soluble Polyfluorenes

Russian Physics Journal - Ink compositions for inkjet printing based on poly(9.9-dioctylfluorene) and its alcohol-soluble analog are created. Current–voltage, brightness–voltage, and...