Elastic Moduli, and Estimations of Some Physical, Thermal, and Optical Parameters of Ge-Se-As Glassy Systems with Improved Mechanical Strength

Abstract

Employing the melt quench approach, glassy systems with the chemical composition Ge30Se(70-x)Asx have been synthesized. As the amount of arsenic increases, various physical, mechanical, thermal, optical parameters and some other aspects of elastic moduli have been assessed. The XRD pattern shows the amorphous characteristics of the inspected materials. The density of the glasses increases from 4.32 to 4.61 g-cm-3 whereas the molar volume declines from 19.32 to 18.62 cm3 mol-1 as the concentration of arsenic increases. The measured values of the ultrasonic velocities have been used to measure the elastic properties, such as the Shear, and longitudinal strains, Bulk modulus, Young's modulus, and Poisson's ratio of the synthesized glasses. The upsurge in the values of elastic moduli indicated the upgrading in the elastic properties of the materials. The outcomes are interpreted in terms of a profound structural change brought about by molecular rearrangement, which regulates the glass’s physical characteristics. The optical band gap energies are found to decrease from 2.17 to 1.86 eV due to the increase in Urbach energies from 040 to 0.64 eV with the incorporation of arsenic atom. The obtained results indicate the perspective of the as-synthesized thermally stable materials to be used in optoelectronic devices.