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چکیده
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In the present study, the structural and opto-mechanical properties of Ge–Sb– As–Se–S chalcogenide glasses have been investigated. For this purpose, different bulk glasses of Ge20Sb5As15Se60-xSx (0 B xB50) were prepared by conventional melt quenching technique in quartz ampoule and different characteristics of prepared glasses such as glass transition temperature, density, hardness, transmittance, optical band gap energy and refractive index were determined. The value of hardness and glass transition temperature of prepared glasses were found to increase with increasing the sulfur content as a result of formation of GeS4 tetrahedral units and increasing the network connectivity and average bonding energy. The optical energy gap (according to Tauc’s relation), transmittance and refractive index of prepared glasses are in direct relation with sulfur content. In this study, the highest value of transmittance (about 70%) and lowest value of refractive index (2–2.3) was achieved in Ge20Sb5As15Se40S20 and Ge20Sb5As15Se10S50 glasses, respectively.
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