Оксидні матеріали електронної техніки – отримання, властивості, застосування.

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Luminescent properties of MgWO4 crystals
(Видавництво Львівської політехніки, 2012) Krutyak, N.; Mikhailin, V. V.; Spassky, D.; Tupitsyna, I. A.; Dubovik, A. M.
Luminescent properties of magnesium tungstate were investigated. Two samples of MgWO4 single crystals grown by different methods were studied. Only intrinsic luminescence attributed to exciton emission was detected for the both samples and. It was shown that the temperature dependence of the low-energy edge in the excitation spectra obeys Urbach rule. Steepness coefficient that was deduced from this dependence indicates self-trapping of excitons in MgWO4. The absence of cation d states in the valence band is a distinctive feature of MgWO4 that is shown to be manifested in the luminescence excitation spectra.
Optical properties of V2O5 crystals
(Видавництво Львівської політехніки, 2012) Shevchuk, V. N.; Luchechko, A. P.; Usatenko, Yu. N.; Kayun, I. V.; Sugak, D. Yu.
The multi-band luminescence and the excitation spectra, and the spectral reflectance of the undoped V2O5 in nano- and bulk-crystalline form at room temperature in the spectral range 200-900 nm were investigated. The nature of luminescence (peaked about 650 nm) is discussed with account of reflectance spectra and Electron Paramagnetic Resonance (EPR) investigations.