Influence of CeO2 content on complex optical parameters of phosphovanadate glass system

• We have reported the complex optical parameters of V2O5–P2O5-B2O3-CeO2 glass systems.
• CeO2 introduces large scale disruption in network by converting of BOs to NBOs which results in larger polarizability.
• Optical absorption in the studied glasses is dominated by polaronic transfer between the Ce3 + and Ce4 +.
• These results can be utilized to develop sensors to detect various analyte.

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.

The glass system of the compositions of 60V2O5–5P2O5–(35-x)B2O3–xCeO2 was prepared by varying concentration with an interval x = 1, 2, 3, 4 and 5 mol% by modified melt-quenching method. The optical properties of samples are analyzed through ultraviolet–visible spectroscopy.Figure optionsDownload as PowerPoint slide