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Current issue   Ukr. J. Phys. 2014, Vol. 59, N 3, p.238-245

    Paper

Yashchuk V.M.1, Navozenko O.M.1, Slominskii Yu.L.2, Grazulevicius J.V.3, Kachkovsky O.D.2, Naumenko A.P.1

1 Faculty of Physics, Taras Shevchenko National University of Kyiv
(4, Prosp. Academician Glushkov, Kyiv 01601, Ukraine; e-mail: a.navozenko@ukr.net)
2 Institute of Organic Chemistry, Nat. Acad. of Sci. of Ukraine
(5, Murmans’ka Str., Kyiv 02660, Ukraine)
3 Department of Organic Technology, Kaunas University of Technology
(19, Radvilenu Sq., Kaunas 50254, Lithuania)

Peculiarities of Electronic Processes in High-Fluorescence Boron-Containing Composite Films

Section: Optics, lasers, and quantum electronics
Original Author's Text: English

Abstract: The absorption and fluorescence spectra of new boron-containing dyes in pure thin films of these dyes, as well as in double-components films of the “matrix–dye (impurity)” type, are studied. As matrix materials, tris(8-hydroxyquinolinato)aluminum (Alq3) and 3,6-di(9-carbazolyl)-9- (2-ethylhexyl) carbazole (Tcz1) are used. The thin films were obtained by the method of vacuum deposition. The comparison of the absorption spectra of the dyes in solutions and films shows that the destruction of dye molecules is not observed in the process of vacuum deposition. For double-component films, the electronic excitation energy transfer from matrix molecules to dye molecules is established. The optimum concentration of dyes for the light-emitting layers of organic light-emitting diodes (OLEDs) based on these compounds is determined.

Key words: cyanine dyes, vacuum deposition, thin films, OLED, boron-containing complexes.