Synthesis and optical properties of Er/Yb/Ag modified bismuth – tellurite based glasses

Abstract

The Er2O3-Yb2O3 codoped TeO2-Bi2O3-Na2O-Glasses along with addition of AgNO3 in basic compositions glasses have been prepared by traditional melt quench method. Investigation of the synthesized glasses is done by DSC, XRD, and UV-Vis. spectroscopy. The glass transition temperature is observed by differential scanning calorimetry. The amorphous nature of the synthesized glasses is confirmed by X-ray diffractogram taken at room temperature. The fluid displacement method on the basis of the Archimedes principle was used to calculated density of prepared samples. The UV-Visible absorption characterizations have been done in the range of 200–1100 nm of synthesized glasses having different percentage of doping of Er2O/Yb2O3/AgNO3. The study of optical properties of the glasses such as the absorption coefficient (α), cut-off wavelength, forbidden energy band gap (Eopt), refractive index and Urbach Energy (Eu) have been done. The effect of Er2O/Yb2O3/AgNO3 on optical properties is observed.