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M. Abbas^a, M. Haseeb-u-Rehman^a, M. Sohail^b, G. H. Tariq^a,*
Chalcogenide Letters, Vol.22, No.7, pp. 561-577, 2025, DOI:10.15251/CL.2025.227.561
Abstract This work presents the fabrication of NiO thin films via versatile sol-gel spin coating method and investigation of annealing effects on their physical properties. After the deposition process, the NiO thin films underwent annealing process at different values of temperatures ranging from 200°C to 350°C for one hour duration. XRD patterns confirmed the polycrystalline nature, along the preferred orientations (110) and (101) planes. Nanoparticles in NiO thin films demonstrated an increase in crystallite size with rising annealing temperatures, reaching a maximum size of 49 nm at annealing temperature 300°C. FTIR patterns revealed Ni-O bands at… More >

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H. J. Hou^a,*, J. X. Bian^a, K. J. Liu^b, W. X. Chen^a, X. W. Lu^a, S. R. Zhang^c
Chalcogenide Letters, Vol.22, No.7, pp. 579-591, 2025, DOI:10.15251/CL.2025.227.579
Abstract Utilizing first-principles method, the structural and anisotropic characteristics of BaGa₄S₇ has been meticulously investigated. The determined lattice parameters and elastic moduli exhibit a high degree of correlation with previously documented data. Based on its mechanical properties, BaGa₄S₇ demonstrates ductility and anisotropy. The anisotropic properties can be examined through a range of metrics. More >

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J. H. Azzawi^a, Yaseen A. Al-Zahraa^b, M. A. Abdulmajeed^c, K. A. Jasim^c, A. Muravitskaya^e, A. A. Al-Hamadani^d,e, A. H. Al-Dulaimi^d,e
Chalcogenide Letters, Vol.22, No.7, pp. 593-601, 2025, DOI:10.15251/CL.2025.227.593
Abstract Four Se₇₀Ge₂₀Sb₁₀ alloy samples were prepared using the melt quenching technique. To improve the energy states of the mobility gap, the samples were exposed to gamma radiation from 60Co source at various doses of 600, 1200, 1500, and 2000 Gy. The electrical characteristics were examined both before and after irradiation. The conductivity analysis revealed that all of our samples were impacted by gamma radiation. The reorganization of the amorphous lattice and the degree of radiation-induced disorder have been involved in the changes that occurred in the electrical characteristics of the irradiated samples. All irradiated and non-irradiated… More >

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D. A. Adu-Boadu^a, M. Paal^a, M. B. Mensah^b, I. Nkrumah^a,*, R. Y. Tamakloe^a, F. K. Ampong^a, R. K. Nkum^a, F. Boakye^a
Chalcogenide Letters, Vol.22, No.7, pp. 603-614, 2025, DOI:10.15251/CL.2025.227.603
Abstract Cd_1-xPb_xSe (0≤ x ≤ 1) thin films with values of x = 0, 0.2, 0.4, 0.5 and 1, have been deposited by chemical bath technique for photovoltaic application. The deposition temperature, time and pH of the reactive solutions were 80℃, 150 min and 11 respectively. The XRD results confirmed the polycrystalline nature of all the films. It also showed that all the films exist in face centered cubic structures. There were no pure phases of CdSe and PbSe identified in the XRD results of the ternary compounds. The average grain sizes determined for each sample were… More >

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R. M. Reddy^a, S. Chirag^b, T. Anu^c, A. R. Venkataramanan^d, S. Karthikeyan^e,*, D. Palaniswamy^f, E. Venugopal Goud^a, N. Dineshbabu^g, T. Thirugnanasambandham^h
Chalcogenide Letters, Vol.22, No.7, pp. 615-624, 2025, DOI:10.15251/CL.2025.227.615
Abstract Solar cells can transform light energy into electrical energy, possibly removing the need for fossil fuel energy resources. Reflection loss in solar cells is a factor contributing to diminished power conversion efficiency, which can be solved through using antireflective coatings on the cell surface. The present research primarily focuses on the development and application of antireflection coatings on the top surface of silicon solar cells. Sb₂Se₃ was deposited over multi-crystalline Si cells with different durations from 15 to 60 minutes. The influence of thin film Sb₂Se₃ coated cells was investigated through optical, current, voltage and thermal… More >

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T. L. Yang^a, P. Y. Lin^b, Y. S. Fu^c, C. Y. Luo^c, K. C. Hsu^a,*
Chalcogenide Letters, Vol.22, No.7, pp. 625-636, 2025, DOI:10.15251/CL.2025.227.625
Abstract In this study, high-crystallinity zinc sulfide (ZnS) at the nanoscale was synthesized using a combination of electrospinning and hydrothermal techniques. Initially, polyvinyl butyral (PVB)/ZnS composite nanofibers were fabricated via electrospinning. Subsequently, a hydrothermal reaction was employed to induce a dissolution-recrystallization mechanism, enabling the gradual formation of highly crystalline ZnS nanoparticles. The structural, morphological, and compositional characteristics of the ZnS nanoparticles were analyzed using scanning electron microscopy (SEM), X-ray diffraction (XRD), transmission electron microscopy (TEM) and energy-dispersive X-ray spectroscopy (EDS). Finally, the photocatalytic activity of three different ZnS materials—synthesized via electrospinning, hydrothermal treatment, and hydrothermal-assisted electrospinning—were More >

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B. Yassine, B. Tahar^*, G. Fathi, B. Meriem, B. Ibtissem
Chalcogenide Letters, Vol.22, No.7, pp. 637-648, 2025, DOI:10.15251/CL.2025.227.637 - 17 December 2025
Abstract In this paper, we designed a two-junction (tandem) solar cell model (tandem solar cell), consisting of an top and bottom subcell with absorber layers of Cu₂SnZnS₄ (CZTS) and Cu₂SnZnSe₄ (CZTSe) materials, respectively, for each subcell with a ZnS buffer layer and a ZnO window layer. This model was validated using the SCAPS-1D numerical simulation program. We also optimized the performance of the tandem cell as a whole using the simulation by studying the effect of the thickness of the absorber layer of the top subcell and the thickness of the absorber layer of the bottom subcell More >

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A. X. Yang^a, L. F. Huang^b,*, Y. Y. Liu^c
Chalcogenide Letters, Vol.22, No.7, pp. 649-663, 2025, DOI:10.15251/CL.2025.227.649
Abstract An innovative flexible electronic device was developed by integrating functionalized carbon nanotubes, bismuth sulfide nanostructures, and a polyvinylidene fluoride matrix to create a highly water‐resistant strain detection platform. The fabricated film exhibited a remarkable static water contact angle of 141°, with only a 3–4° reduction after 48 hours of immersion, confirming its excellent hydrophobic performance. Mechanical testing revealed a tensile strength of 43.2 MPa and maintained over 96% of its original strength following 1000 bending cycles, thereby demonstrating outstanding durability under repetitive deformation. Electrical characterization showed an initial conductivity of 12.3 S/m and a baseline resistance near… More >

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