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M. Xie^a, W. W. Lu^a, W. Yan^a, Y. C. Wei^a, Y. P. Chen^a,b, J. Xu^a,b,*
Chalcogenide Letters, Vol.21, No.3, pp. 217-227, 2024, DOI:10.15251/CL.2024.213.217
Abstract In this paper, a MoSe₂/TiO₂ composite photocatalyst was constructed by modifying TiO₂ with MoSe₂ as a group catalyst. The results showed that pure TiO₂ and MoSe₂ had no degradation activity for RhB, and the composite catalyst of 0.03 g MoSe₂ had the best photocatalytic degradation activity for RhB. Through SEM, TEM, UV-VIS absorption spectrum, transient photocurrent curve, photoluminescence spectrum, and electrochemical impedance spectrum analysis, it can be seen that the excellent performance of 0.03 g MoSe₂ composite sample is due to its excellent nanostructure, and uniform TiO₂ nanosheets are attached to MoSe₂ flower spheres. The active site of RhB photocatalytic More >

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S. H. Liu^a, J. R. Yuan^a,*, Y. Wu^a, X. H. Deng^a, Q. M. Yu^b
Chalcogenide Letters, Vol.21, No.3, pp. 229-241, 2024, DOI:10.15251/CL.2024.213.229
Abstract Antimony selenide (Sb₂Se₃) has remarkable optoelectronic capabilities that make it a promising option for the next generation solar cells. In this work, a solar cell with the structure Al/FTO/CdS/Sb₂Se₃/Mo is modeled and numerically analyzed using SCAPS-1D program. Furthermore, a Al/FTO/CdS/Sb₂Se₃/Sb₂S₃/Mo solar cell structure that uses Sb₂S₃ as the back surface field (BSF) layer is proposed. A comprehensive examination of photovoltaic characteristics for the solar cells was carried out. The optimization process involved adjusting the operating temperature, series and shunt resistance, doping concentration, bulk defect density, back contact metal work function, and thickness of the absorber layer. The More >

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Yu. S. Hordieiev^*, A. V. Zaichuk
Chalcogenide Letters, Vol.21, No.3, pp. 243-253, 2024, DOI:10.15251/CL.2024.213.243
Abstract The glass composition (70-x)PbO–(30-y)B₂O₃–(x+y)AlF3, where x and y ranges from 0 to 20 mol%, were prepared using the conventional melt-quenching-annealing technique. The structural and thermal properties of the glasses were comprehensively analyzed using techniques like Differential Thermal Analysis (DTA), Dilatometry, Fourier-Transform Infrared Spectroscopy (FTIR), X-ray Diffraction (XRD), and Scanning Electron Microscopy (SEM). XRD confirmed the amorphous, non-crystalline structure of the glasses. The glass network was found to be composed of structural units such as PbO₄, BO₄, BO₃ and AlO₆ using FTIR spectroscopy. FTIR analysis revealed significant structural changes, including the transformation of BO₄ to BO₃ units and the increase… More >

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K. N’dri^*, B. M. Dally, C. Vamoussa, D. Houphouët-Boigny
Chalcogenide Letters, Vol.21, No.3, pp. 255-262, 2024, DOI:10.15251/CL.2024.213.255
Abstract Glasses of Sb₂S₃-As₂S₃ system with nominal composition of As_0,4xSb_0,4(100-x)S₆₀(where x= 10, 25, 50, 75 and 100 mol% As₂S₃) were investigated by different quenching methods and Raman spectroscopy. All studied samples were in the vitreous state. The average coordination number (Z), being equal to 2.4, has indicated that the numbers of neighbors of non-chalcogens (As and Sb) and chalcogens (S and Te) atoms were respectively 3 and 2. These coordination numbers were conditions fulfilled by the atoms to obtain vitreous materials. The vibrations of the SbS₃ and AsS₃ structural units dominated the Raman spectra of the studied Sb₂S₃-As₂S₃ glasses. More >

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J. M. Shi^*, H. F. Zhang, H. C. Wang
Chalcogenide Letters, Vol.21, No.3, pp. 263-274, 2024, DOI:10.15251/CL.2024.213.263
Abstract This study presents the synthesis and characterization of 3D ZnO@MoS₂ nanocomposites, demonstrating their superior performance in photoelectrochemical applications. Employing a combination of hydrothermal and solvothermal methods, the research focuses on creating heterostructures with optimized interfacial characteristics. The ZnO@MoS₂ composites show a substantial increase in photocurrent density (1.02 mA/cm^²), compared to ZnO nanorods (0.32 mA/cm^²), underlining enhanced charge separation efficiency. In electrocatalytic hydrogen evolution, the heterostructures exhibit a lower onset potential (-175 mV vs RHE) and reduced Tafel slope (51 mV/dec), indicating improved catalytic activity over MoS₂ nanosheets. Additionally, the composites demonstrate a significant increase in electrochemical capacitance (398 More >

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A. A. Mansour^a, H. A. Salman^b, S. A. Abdul Wahab^c, N. F. Habubi^c, S. S. Chiad^d,*, Z. S. A. Mosa^c, Y. H. Kadhim^d
Chalcogenide Letters, Vol.21, No.3, pp. 275-284, 2024, DOI:10.15251/CL.2024.213.275
Abstract To grow SnS films, the spray pyrolysis deposition (SPD) process is applied. The films were deposited at various substrate temperatures (S_T) of 400, 450, and 500 degrees Celsius for two hours. Through XRD analysis, the impact of ST on the structure was investigated. Peak (113) crystallite sizes were 13.16, 21.48, and 38.87 nm, respectively, at base temperatures of (400, 450, and 500) ℃. The effect of ST on the structure was examined using XRD analysis. A predominat Peak at (113) plane. The crystallite sizes at base temperatures of (400, 450, and 500) ℃ were 13.16, 21.48, More >

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M. I. Ahamed^a,*, T. Ayyasamy^b, N. Prathap^a, S. Ahamed^c
Chalcogenide Letters, Vol.21, No.3, pp. 285-291, 2024, DOI:10.15251/CL.2024.214.285
Abstract In recent times, zero-dimensional materials have gained importance from a fundamental and technological perspective. Lead selenium sulphide (PbSeS) is a potential candidate for finding interest in its zero-dimensional form among many compound semiconductors. Hence, in this communication, we explored the impact of quantum confinement effects on the energy band gap and wavelength of PbSeS semiconductor nanocrystals (Quantum dots) using cohesive energy and hyperbolic band models (HBM). Experimental data, such as scanning electron microscopy, UV-Vis-NIR, and PL spectroscopies were used to determine the size of nanoparticles and wavelength. PbSeS nanocrystals were also prepared by one-pot synthesis. More >

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