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A. Thamer^a, S. Mohamed^b,*
Chalcogenide Letters, Vol.20, No.12, pp. 847-856, 2023, DOI:10.15251/CL.2023.2012.847
Abstract Using Sol-gel technology, nanocomposite CdS: ZnO thin films with an equal molar ratio of 0.5 M on a glass substrate for water decontamination purposes. The ZnO doping ratios were (0, 1, 3, 5) vol. The ultrastructural, morphological, and optical properties of the prepared thin films were studied using X-ray diffraction (XRD), atomic force microscopy (AFM), and UV-vis spectra. The results indicated that the prepared nanostructured CdS: ZnO thin films contain uniformly spaced crystalline grains of both CdS and ZnO. The ZnO-doped selection ratio and uniform grain distribution produced outstanding photocatalytic and photocatalytic performance. With a More >

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G. Amirbekova^a, Zh. Tolepov^a,*, N. Guseinov^a, R. Nemkaeva^a, T. Kuanyshbekov^b, A. Ramazanova^a, D. Tlaubergenova^a
Chalcogenide Letters, Vol.20, No.12, pp. 857-861, 2023, DOI:10.15251/CL.2023.2012.857
Abstract Microcrystalline lead sulfide (PbS) films were synthesized using the chemical deposition method. The films were deposited on pre-cleaned glass substrates and polished silicon wafers. Chemicals of high purity were utilized in the process. The morphology, composition, and structure of the films were characterized using scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), and X-ray diffraction (XRD). The films exhibited a galena phase with a face-centered cubic structure belonging to the Fm-3m space group. The average grain size was determined using the WilliamsonHall method, revealing a homogenous structure. Raman spectroscopy further confirmed the structural integrity of More >

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K. A. Mohammed^a,*, R. A. Talib^b, S. Algburi^c, A. Kareem^d, B. Bhavani^e, M. A. Alkhafaji^f, R. S. Zabibah^g, F. H. Alsultany^h, S. Sharma^i,j
Chalcogenide Letters, Vol.20, No.12, pp. 863-870, 2023, DOI:10.15251/CL.2023.2012.863
Abstract Novel nanocomposite structure has been made from physical mixing of polymer blend consist PMMA, PEO and PS filled with selenium nanoparticles. The nanocomposite had been deposited on glass slide by drop casting to form a thin film. This film was examined by required instrument like FESEM, XRD, EDS and UV-Vis to show the main physical properties of it. The XRD results were reflected the crystallinity nature of selenium NPs. SEM result shows the porosity nature of prepared film , where the pore size ranging from nano to micro size on all the surface of film. More >

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A. M. Raduta^a,b, A. M. Panaitescu^a, A. Radu^a, L. Ion^a, V. A. Antohe^a,c, O. Toma^a, S. Iftimie^a, S. Antohe^a,d,*
Chalcogenide Letters, Vol.20, No.12, pp. 871-882, 2023, DOI:10.15251/CL.2023.2012.871
Abstract This paper proposes a comparative study between two sub-micrometric multi-layered photovoltaic cells, based on A_II–B_VI compounds, using different structures for the holes transport and collection electrode. Using the modified form of the Shockley equation, the diode factor, n, the reverse saturation current, I₀, and the series R_s and shunt R_sh resistances were evaluated and their effect on the photovoltaic cells performances were discussed. The photovoltaic performances were analysed by current-voltage characteristics at illumination in standard AM 1.5 conditions, and the specific parameters were determined. More >

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J. M. Al Abbas^a,*, L. Al Taan^a, M. M. Uonis^b
Chalcogenide Letters, Vol.20, No.12, pp. 883-890, 2023, DOI:10.15251/CL.2023.2012.883
Abstract In this work, cadmium selenide (CdSe) thin films were deposited successfully by spray pyrolysis at different substrate temperatures. The influence of the preparation technique on the optical, morphological, and structural properties of the different substrate temperature CdSe films were investigated by using X-ray diffraction (XRD), scanning electron microscopy (SEM), and UV-Visible optical transmission. The XRD analysis reveals that CdSe thin film has hexagonal (wurtzite) and (cubic) crystal structures with different particle sizes depending on the substrate temperature. The SEM image shows uniform and adherent crystals. The optical energy gap was found to be in the More >

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R. Jothiramalingam^*, H. Al-Lohedan, D. M. Al-Dhayan, A. Karami
Chalcogenide Letters, Vol.20, No.12, pp. 891-901, 2023, DOI:10.15251/CL.2023.2012.891
Abstract Layered structure transition metal chalcogenide compound’s such as Molybdenum sulfide (MoS₂) deposition in micro/meso porous architecture of MnO₂ could provide hybrid inter esting features. Multivalent MnO₂ is an attractive low cost and toxic free catalytic materi al for oxidation reaction and electrochemical applications. Non-ionic surfactant implica tion in mesoporous metal ion modified MnO₂ by deposition of metal chalcogenide is an ef fective composite for dye degradation applications. The low-cost pre-cursor makes it at tractive for large-scale production at industrial scale. Hence, in the present study deals with exploit the mechanism of metal chalcogenide and graphene oxide insertion More >

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Y. Jie^a, S. R. Zhang^a,*, H. J. Hou^b, L. H. Xie^c
Chalcogenide Letters, Vol.20, No.12, pp. 903-913, 2023, DOI:10.15251/CL.2023.2012.903
Abstract Based on the first-principles method, the electronic structure, mechanical and optical properties of α-Cu₂S are studied. The results show that the optimized structural parameters are in good agreement with the experimental value. The energy band structure and density of states of α-Cu₂S is obtained by calculation and analysis. The mechanical properties such as bulk modulus, shear modulus, Young's modulus and Poisson's ratio are calculated at different pressures. At last, the dielectric function, refractive index, absorption coefficient and reflectivity of α-Cu₂S is analyzed. It was found that α-Cu₂S is a direct bandgap with a band gap of 1.2 More >

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