Enhancement of Optical and Electrical Properties of Pr³⁺ Doped Na₂O–ZnO–TeO₂ Glass Materials

Abstract—Praseodymium incorporated Na₂O–ZnO–TeO₂ (NZT) glass materials were prepared through usual melt quenching technique. The temperature of glass transition and the melting point were obtained by using thermal analyses. The amorphous and ionic nature of the prepared samples was obtained from the recorded X-ray diffraction pattern and FTIR spectra respectively. The optical band gap energy was calculated using UV-Vis absorption spectra and was observed to be decreased from 2.86 to 2.46 eV due to the increasing concentration of Pr³⁺ ions. The peaks of absorption spectra were found. The intense emission was observed from the fluorescence measurement for the emission band of Pr³⁺ doped glass materials. The doping of higher concentrations of Pr³⁺ ions enhanced the intensity of the emission peaks. The CIE chromaticity coordinates were estimated from fluorescence spectra for pure and Pr³⁺ doped glass samples to know the suitability of laser emission of these glass samples. The dielectric constant of the glass materials was observed to be independent of frequency in the large range of frequency (500 Hz to 2 MHz). The variation of conductivity of the glasses was exposed the Arrhenius mechanism of conduction with the temperature.