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S. R. Ahmed^a,*, M. V. V. K. S. Prasad^a, K. Keerthivasan^b
Chalcogenide Letters, Vol.22, No.9, pp. 765-776, 2025, DOI:10.15251/CL.2025.229.765
Abstract This study focuses on optimizing practical synthesis to produce ultrafine CdS nanoparticles. Three separate chemical synthesis processes, namely microwave, wetchemical, and sonication methods, are used to generate CdS nanoparticles. Moringa oleifera leaf extract employed green syntheses of CdS nanoparticles are also performed for additional discussions. The generated CdS nanoparticles were subjected to a comparative assessment to identify the most effective processing method for synthesizing CdS nanoparticles. Even though the processing parameters were altered over their synthesis, the hexagonal structure was retained in the CdS nanoparticles. The observed results of CdS nanoparticles from XRD, SEM/EDX, and More >

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X. Y. Chen^a,b, Y. H. Cai^a, Y. S. Chen^c, S. J. Huang^b, M. H. Li^d, Y. H. Li^e, C. H. Lin^c, H. Chen^a,*
Chalcogenide Letters, Vol.22, No.9, pp. 777-785, 2025, DOI:10.15251/CL.2025.229.777
Abstract This study focuses on the development of zinc oxide (ZnO)/zinc sulfide (ZnS) core-shell structures on flexible polyethylene terephthalate (PET) substrates for enhanced light sensing. PET offers high elasticity, optical transparency, and chemical resistance, making it ideal for wearable optoelectronics. By optimizing the vulcanization process, a uniform ZnS shell is formed on the exposed regions of ZnO nanorods (NRs), significantly enhancing ZnO-based sensor’s sensitivity to visible light, especially red light (peak wavelength at 630 nm). Structural and spectral analyses confirm the successful formation of the ZnO/ZnS heterostructure, improved charge separation, and broadened light response. To improve More >

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U. Chalapathi^a, M. Vasudeva Reddy^b,c, C. P. Reddy^d, R. Dhanalakshmi^e, A. Divya^f, K. Mohanarangam^g, S. H. Park^a,*
Chalcogenide Letters, Vol.22, No.9, pp. 787-796, 2025, DOI:10.15251/CL.2025.229.787
Abstract Recently, cubic SnS shows promising potential for optoelectronic applications, including solar cells. Despite its advantages, the photoelectrochemical (PEC) properties of cubic SnS photoelectrodes remain underexplored. This study examines the PEC performance of cubic SnS photocathodes synthesized on FTO substrates via chemical bath deposition and annealed at 250o C for varying durations (10, 20, and 30 min). The as-deposited SnS films, characterized by a cubic crystal structure (lattice parameter: 1.162 nm, crystallite size: 17 nm), an energy gap of 1.75 eV, and an initial photocurrent of 0.8 mA/cm2 at -1 V vs. Hg/HgO, showed significant enhancement More >

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R. M. Reddy^a, J. A. Prakash^b, A. Tonk^c, S. Karvendhan^d, G. Sivaraman^e, D. K. Patel^f, S. P. Dillibabu^g, S. Karthikeyan^h,*, T. Thirugnanasambandhamⁱ
Chalcogenide Letters, Vol.22, No.9, pp. 797-806, 2025, DOI:10.15251/CL.2025.229.797
Abstract The current situation necessitates advancements in renewable energy as an alternative for conventional energy sources. Reflection loss in solar cells is a contributing factor to diminish the power conversion efficiency, which can be reduced by employing antireflective coatings. The current investigation focuses on improvement in photocurrent generation of monocrystalline silicon solar cells by employing Gallium sulfide (Ga_₂S₃) as anti-reflective coatings (ARC). The RF sputter coating method has been used for Ga_₂S₃ deposition at different coating durations (10, 20, 30, and 40 minutes). The transmittance, reflectance, I-V characteristics, electrical properties, and thermal behaviour of the Ga2S3 coatings… More >

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F. Khan^a, S. Noreen^a, M. S. Youssef^b, A. Jilani^c, H. T. Ali^b, G. Mustafa^d, M. Zahid^a,*
Chalcogenide Letters, Vol.22, No.9, pp. 807-820, 2025, DOI:10.15251/CL.2025.229.807
Abstract In this study Fe doped SnO₂-SnS₂ (FS) and Fe doped SnO₂-SnS₂-polypyrrole (FS-PPY) were synthesized and studied for the methylene blue (MB) egrdation under UV light. The morphological and structural characterizations were carried out by FTIR, SEM-EDX, XRD and XPS. It has been found that FS-PPy degrade methylene blue upto 98 % under optimized conditions as pH =3, dye concentration = 10 ppm, oxidant dose = 2 mM. The Langmuir-Hinshelwood kinetics model fitted well. The optimization was studied using response surface methodology. Scavengers study was carried out to find the active species. Reusability of photocatalyst was evaluated More >

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A. N. Jafarova, A. F. Gochuyeva^*
Chalcogenide Letters, Vol.22, No.9, pp. 821-828, 2025, DOI:10.15251/CL.2025.229.821
Abstract In our work, we investigated the photoelectric effects arising in composites consisting of polar (fluorine-containing) and non-polar (polyolefin) polymers—such as high-density polyethylene (HDPE), PVDF, F42 — and an inorganic phase composed of A^II< B^VI (CdS, ZnS) and ferrocene. In addition, the processes occurring in these composites during the creation of these effects have been studied. It was found that the parameters of the formation of the posistor effect in the polymer-ferrocene composite are related to the presence of an interphase potential barrier, which is determined by the geometric dimensions of the interphase transition layer, dielectric permeability, More >

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I. Sajjad^a, U. Parveen¹, H. Al-Ghamdi^b,*, M. Yaseen^a, S. Saleem^a, Nasarullah^a
Chalcogenide Letters, Vol.22, No.9, pp. 829-845, 2025, DOI:10.15251/CL.2025.229.829
Abstract Herein, we employed modified Becke-Johson (mBJ) potential based first principles method to investigate the structural, optoelectronic, and magnetic properties of pure SrS and Ni doped Sr_1-xNi_xS alloys at varying doping concentrations. Formation enthalpy analysis predicts thermodynamical stability of resultant alloys. Geometry optimization was performed in order to optimize the super cells to obtain ground state energy state. After confirming their stability, we investigated their magnetic, electronic, and optical attributes. Pure SrS exhibits an indirect band gap of 3.53 eV (which is in good agreement with experiments), while nickel doping in SrS results in lowering the bandgap… More >

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Y. B. K. Kumar^a,, S. G. Prasad^b, A. S. S. Smitha^c, S. M. Naidu^d, G. S. Babu^c, P. U. Bhaskar^e, U. Chalapathi^f,
Chalcogenide Letters, Vol.22, No.9, pp. 847-854, 2025, DOI:10.15251/CL.2025.229.847
Abstract Cu₂MgSnS₄ thin films have emerged as potential candidates for use in photovoltaic applications owing to their direct band gap properties. These quaternary compounds are fabricated through the spray pyrolysis method at 175 °C, utilizing two different carrier gases, such as air and nitrogen. After pyrolysis, deposited films are annealed at 450 °C for 1 hour. Structural analysis confirms the films exhibit a tetragonal kesterite structure. Using nitrogen as the carrier gas results in a larger crystallite size, accompanied by a reduction in both the dislocation density and microstrain. Raman spectroscopy further validates phase purity. Surface morphology analysis indicates More >

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