Abstract
(90 P2O5 + x V2O5 + (10-x) BaO) (x = 0, 0.75, 1.50, 2.25 and 3.00 % in moles)) prepared by a melt quenching process. The physical properties, such as density (ρ) molar volume (VM), refractive index (n), metallicity (M), electron polarizability (α) and optical basicity (Λ), and were determined.XRD, DSC, Raman spectra, optical transmission, and photoluminescence spectroscopy were investigated at room temperature. The electrical properties were studied using an AC impedance spectroscopy. The observed increase in Tg with V2O5 reflects an increase in bond strength by the presence of the VOP bonds.At the 523−773 K temperature range following the Arrhenius law, the activation energy (≈0.276 eV) decreased with the Vanaduim rate. At the 423–523 K temperature range by Mott’s VRH model the highest density of Fermi states, N(Ef) values 3.45 1025 eV−1 cm-3 were obtained with PVB2.25 sample.Finally, the study exhibited a low relaxation time τrel≈1 μs and Vanadium substutition reduces the gap to 4.12 eV and the Urbach energy to 0.26 eV.
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