Studies on optical and electronic characteristics of ternary zinc-tellurite glasses with varying Zn doping concentration

Abstract

• Ternary Zn-Te base glasses with different mole percent of ZnO concentration were prepared by melt and quench method. • Changes in the glass composition were found to alter the characteristics of ternary Zn-Te base glasses. • With increasing ZnO concentration from 5% to 20% density increases from 4.918 to 5.196 gm/cc. • With the addition of Zinc oxide to ternary Zn-Te glass matrix, the refractive index increases. • High R.I. and good optical allowance recommend the candidature of synthesized ternary glasses for various photonic devices. Ternary zinc-tellurite glasses of batch composition x%-(ZnO)-(90-x)%(TeO 2 )-10 %Na 2 O with × = 5, 10, 15 and 20 %, were synthesized by customary melting and quenching method. The morphological, physical, and optical characteristics of the material were investigated. Differential scanning calorimetry was done for glass transition temperature, whereas X-ray diffraction and, Scanning Electron Microscopy (SEM) -Energy Dispersive X-ray Analysis (EDAX or EDS), was done for information of surface morphology and batch composition. Structural information is gathered by Raman spectra. Physical parameters as density, oxygen packing density (OPD), Zn 2+ concentration, poleron radius and inter atomic distance have been calculated. Optical properties such as coefficient of absorption, optical energy band gap, refractive index and Urbach’s energy were calculated. The effect of ZnO concentration on physical and optical parameter has been studied.