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S. Kumar^a,*, P. Kumar^b, S. K. Sahni^c, S. P. Singh^d, K. Singh^e
Chalcogenide Letters, Vol.20, No.6, pp. 393-398, 2023, DOI:10.15251/CL.2023.206.393
Abstract Differential Scanning Calorimetry (DSC) is performed at different heating rates under non-isothermal conditions to study the heat capacities studies of glassy Se₇₅Te_15-XCd₁₀In_X(x=0, 5,10and 15) alloys.Heat capacities of Se₇₅Te_15-XCd₁₀In_X(x=0, 5,10 and 15) chalcogenide glasses at glass transitions (T_g) and crystallisations temperatures (T_c) werementioned in this work. The evaluated endothermic (ΔC_pg) and exothermic (ΔC_pc) heat capacities of Se-Te-Cd-In system varies with alloying concentrations and maximum at threshold composition (5 at wt.% of In). This could be explained on the basis of chemical bond theory of the solids. More >

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I. Nkrumah^*, F. K. Ampong, A. Britwum, M. Paal, B. Kwakye-Awuah, R. K. Nkum, F. Boakye
Chalcogenide Letters, Vol.20, No.6, pp. 399-407, 2023, DOI:10.15251/CL.2023.206.399
Abstract A study has been carried out to investigate the effect of the concentration of Sn in the metallic precursor on the structure, morphology, optical and electrical properties of PbSnS thin films. The films were directly electrodeposited on ITO-coated glass substrates using a 3-electrode electrochemical cell having graphite as the counter electrode and Ag/AgCl as the reference electrode. Several depositions were carried out, with each deposited film having a different concentration of Sn in the metallic precursor whilst all other parameters were kept constant for all the films. Post deposition annealing was carried out in air… More >

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G. Jiao^a, G. L. Liu^a,*, L. Wei^a, J. W. Zhao^a, G. Y. Zhang^b
Chalcogenide Letters, Vol.20, No.6, pp. 409-421, 2023, DOI:10.15251/CL.2023.206.409
Abstract Using density functional theory, the effect of biaxial tensile strain on adsorption of S in ReS₂ monolayer is calculated. The study finds intrinsic ReS₂ system and monolayer ReS₂ adsorbed S system are affected by tensile deformation. Intrinsic ReS₂ has direct band gap. As S appears, the system becomes indirect band gap. With tensile deformation amount of the intrinsic ReS₂ system reaching 10%, the band gap reduces to 0.064eV. The growth rate of reflection and absorption coefficient are decreased by tensile deformation. The maximum reflection and absorption peak undergo red shift, improving the light reflection and absorption ability of More >

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A. Kafel^*, S. N. Turki Al-Rashid
Chalcogenide Letters, Vol.20, No.6, pp. 423-429, 2023, DOI:10.15251/CL.2023.206.423
Abstract The study of confined quantum systems exhibit distinct behavior compared to that in bulk solids. This enables the design of materials with tunable chemical, physical, electrical and optical properties. In this paper, the effect of quantum confinement energy on the optical properties (gap energy, refractive index) of semiconductors gallium nitrate (GaN) and zinc sulfide (ZnS) is studied. The study is done using the MATLAB computer program (20a). This software is based on the Brus model and the particle in-a-box model. The results indicate that the optical properties depend on the quantum confinement energy, with an More >

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H. M. Ali^*, M. H. Mustafa
Chalcogenide Letters, Vol.20, No.6, pp. 431-437, 2023, DOI:10.15251/CL.2023.206.431
Abstract We investigated at the optical properties, structural makeup, and morphology of thin films of cadmium telluride (CdTe) with a thickness of 150 nm produced by thermal evaporation over glass. The X-ray diffraction study showed that the films had a crystalline composition, a cubic structure, and a preference for grain formation along the (111) crystallographic direction. The outcomes of the inquiry were used to determine these traits. With the use of thin films of CdTe that were doped with Ag at a concentration of 0.5%, the crystallization orientations of pure CdTe (23.58, 39.02, and 46.22) and More >

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