Abstract
•Ternary Pb10Se90-xGex, bulk glasses and thin films have been synthesized.•The optical absorbance, absorption coeff., and skin depth and effect were investigated and discussed.•Chemical bond approach was employed to study cohesive energy and coordination number.•An extensive study was done to deduce many of the physical properties of these bulk glasses.•Mean bond energy, heat of atomization, glass transition temp., atomic densities and others were studied.
Several substantial physical and optical properties of non-crystalline Pb10Se90-xGex bulk glasses and thin-films (0.0 ≤ x ≤ 10 at.%) have been studied. Bulk and film samples were synthesized via melt-quench and thermal-evaporation processes, respectively. The films were fabricated on pre-cleaned glass substrates under vacuum ≈5 × 10−4 Pa. The non-crystallinity of studied samples has investigated by X-ray diffractograms. A good-matching between selected compositional elements and those measured experimentally was confirmed by energy-dispersive X-ray analysis. The absorption nature of samples was studied in detail, where absorbance, absorption coefficient, skin depth and skin effect were discussed. The indirect transition bandgap energy was studied and its value decreases as Ge-content increases. Cohesive energy, average coordinate number, average atomization heat, lone-pair electrons, mean-bond energy, and others were discussed. Based on density values, many parameters were estimated and studied, like compactness, packing density, atomic densities, polaron radius, field strength. All studied characterizations are strongly dependent upon Ge-percentages.