title: Influence of CeO₂ content on complex optical parameters of phosphovanadate glass system.
abstract: In the present work, glass system of the compositions of 60V2O5-5P2O5-(35-x)B2O3-xCeO2 is prepared by modified melt-quenching method. The conformation of amorphous phase in sample was done through X-ray diffraction analysis. Optical studies were carried out at room temperature and direct and indirect band gap energy, refractive index, Urbach energy, molar refractivity and polarizability have been determined. The values of indirect band gap are lower than the corresponding values of direct band gap. Urbach energy is observed between 0.58 and 0.48 eV. The samples show gradual increase in absorption around the 225 nm, which results in increase of refractive index and optical conductivity. The real and imaginary dielectric constants show good agreement with each other.
authors: Department of Physics, Indira Gandhi Kala Mahavidyalaya, Ralegaon, India. Electronic address: rajeshbarde1976@gmail.com.
authors: R V
authors: RV
authors: Barde
keywords: Absorption; Molar refractivity; Optical band gap; Urbach energy