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C. E. H. Merzouk^a, S. Bensmaine^a, L. Ghalmi^a, A. Aissat^b,c,*
Chalcogenide Letters, Vol.21, No.2, pp. 113-124, 2024, DOI:10.15251/CL.2024.212.113
Abstract This comparative numerical simulation study investigates the electrical characteristics of two heterojunction thin-film solar cells based on Kësterites Copper Zinc Tin Sulfide. The study compared two solar cells with different structures, Zinc Oxide ZnO/Cadmium Sulfide CdS/Kësterites CZTS/Molybdenum Mo and Zinc Oxide ZnO/Zinc Sulfide ZnS/Kësterites CZTS/Molybdenum Mo, to determine which is more efficient in achieving maximum photovoltaic efficiency. The results showed that the ZnO/ZnS/CZTS/Mo solar cell is the better option, outperforming the CdS/CZTS/Mo solar cell in terms of short-circuit current density J_sc, open-circuit voltage V_oc, form factor FF, and photovoltaic efficiency η. The study also investigated the More >

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M. Jabeen^a, N. Ali^b,*, Z. Ali^c, H. Ali^b, A. A. A. Bahajjaj^d, B. Haq^e, S. H. Kim^e
Chalcogenide Letters, Vol.21, No.2, pp. 125-133, 2024, DOI:10.15251/CL.2024.212.125
Abstract In this study, Tin selenide (SnSe) was prepared via thermal evaporation from tin ingots and selenium powder followed by annealing at 250°C in an inert atmosphere of Argon gas. Two samples were used for characterization purposes, as-deposited and annealed. The structural parameters including particle size, strain, dislocation density, and number of crystallites per unit area were calculated from XRD while the optical properties including band gap were extracted from UV-visible spectroscopy. Four probe techniques were used to measure the electrical properties. More >

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X. C. Han, K. Yu, J. Q. Bao, Y. L. Tong^*
Chalcogenide Letters, Vol.21, No.2, pp. 135-150, 2024, DOI:10.15251/CL.2024.212.135
Abstract To improve the understanding of the structure network of chalcogenide glass, we report an investigation of the structure and vibrational property of the Ge-S-Br system chalcogenide glass. The structural origin was interpreted by the result of ab initio calculation performed on the basic units such as ethane-like(ETH) structure(Ge₂S₆ and Ge₂Br₆),edge-sharing(ES) structure Ge₂S₂S_nBr_4-n (n=0,1,2,3,4) and isolated GeS_nBr_4-n tetrahedron (n=0,1,2,3,4), which represent the local structure of Ge-S-Br glassy system. In addition, We have compared the experimental spectra of GeS₂, GeS₃Br, GeSBr₂ glasses and liquid GeBr₄ to the calculated main vibrational modes of basic units by ab initio calculation. The calculated vibrational More >

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M. A. Hussain^a,*, P. J. Saikia^b, S. R. Devi^a, L. R. Singh^c
Chalcogenide Letters, Vol.21, No.2, pp. 151-159, 2024, DOI:10.15251/CL.2024.212.151
Abstract Nickel (Ni⁺²) doped nanocrystalline Bi₂S₃ thin films are deposited on the glass substrate from the solutions containing Bismuth Nitrate, Ethylenediamine Tetraacetic acid (EDTA) and Thioacetamide at a bath deposition temperature of 318K. The optical, surface morphological and electrical properties of Ni-doped Bi₂S₃ thin films prepared at three different doping concentration are investigate by using ultraviolet–visible transmission spectra (UV–Vis), Scanning electron microscopy (SEM), Energy Dispersive X-ray (EDAX) and thermo-e.m.f. techniques. The optical band gap energies are found in between 2.32-2.43 eV. The SEM images show that the prepared films are continuous, dense and distributed over the entire area More >

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A. N. Abouelkhir^a,*, E. R. Shaaban^b,c, M. Tag El-Dine^a, K. I. Hussain^d, I. S. Yahia^e
Chalcogenide Letters, Vol.21, No.2, pp. 161-168, 2024, DOI:10.15251/CL.2024.212.161
Abstract Cadmium sulfide was prepared by first turning it into a powder, which was then used to evaporate heat to create thin films. Additionally, the spray pyrolysis method was used to produce films of cadmium sulfide. A structural comparison using the crystallize size and lattice parameters. Furthermore for the prepared samples, an analysis of their optical characteristics was conducted through measurements of absorbance, transmission, and reflection, resulting in the determination of the energy gap. More >

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H. Guan^*, J. X. Xu, Z. Y. Yang, X. Y. Qian, M. Q. Zhao
Chalcogenide Letters, Vol.21, No.2, pp. 169-173, 2024, DOI:10.15251/CL.2024.212.169
Abstract Cu₂MgSnS₄ (CMTS) nanoparticles are successfully prepared via a solvothermal approach. X-ray diffraction (XRD) and Raman reveal that pure zinc-blende CMTS phase is obtained. Scanning electron microscopy (SEM) shows that CMTS nanoparticles exhibit microsphere structure. The band gap of as-obtained CMTS nanoparticles is calculated to be 1.68eV, indicating a potential candidate for tandem solar cells. The degradation rate of methylene blue (MB) with under visible-light irradiation is about 87%, indicating that CMTS can be useful for effective visible-light photocatalyst. More >

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T. A. Chowdhury^*, R. B. Arif, H. Israq, N. Sharmili, R. S. Shuvo
Chalcogenide Letters, Vol.21, No.2, pp. 175-187, 2024, DOI:10.15251/CL.2024.212.175
Abstract The solar cell capacitance simulator (SCAPS-1D) has been used to simulate, design and analyze of MoSe₂, an attractive transition metal dichalcogenide (TMDC) material, based heterojunction solar cells to use it as a potential alternative to conventional absorber layers used in solar cells. The work also focuses on finding optimal absorber, buffer layer thickness and impact of operating temperature on solar cell performance with a possible replacement to toxic CdS buffer layer. It has been obtained that the optimum thickness of MoSe₂ absorber layer is 1 µm and buffer layer is about 0.04 µm. The efficiency obtained More >

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H. J. Hou^a,*, Su Fan^a, H. Y. Wang^a, W. X. Chen^a, X. W. Lu^a, S. R. Zhang^b, L. H. Xie^c
Chalcogenide Letters, Vol.21, No.2, pp. 189-200, 2024, DOI:10.15251/CL.2024.212.189
Abstract The electronic structure, elastic and thermodynamic properties of Cu₂MgSnS₄ was studied based on density functional theory (DFT). The results show that Cu₂MgSnS₄ is a direct bandgap semiconductor. The B/G of Cu₂MgSnS₄ is greater than 1.75, indicating that Cu₂MgSnS₄ is a ductile material. Through the study of thermodynamic properties, it is found that the temperature increases, the bulk modulus B and Debye temperature θ decrease, while the heat capacity C_v, entropy S, Grüneisen constant γ and thermal expansion coefficient increase, and the heat capacity is close to the Dulong-Petit limit. As the pressure increases, the bulk modulus B, Debye More >

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S. F. Hathot^a,*, B. M. Al Dabbagh^a, H. Aboud^b
Chalcogenide Letters, Vol.21, No.2, pp. 201-215, 2024, DOI:10.15251/CL.2024.212.201
Abstract In this study, a series of barium-boro-tellurite glass hosts with varying concentration of Dy₂O₃ doping (0 to 1.25 mol%) were made by melt-quenching method. A study was conducted to investigate how Dy₂O₃ dopants affect the physical and spectroscopic traits of glasses. Raw materials including barium oxide (BaO), tellurium dioxide (TeO₂), boron oxide (B₂O₃), and dysprosium oxide (Dy₂O₃) were used to produce these glasses. XRD patterns of the samples showed a broad hump and absence of long-range periodic lattice arrangements, indicating their amorphous nature. The Raman spectral analyses displayed the various vibration modes where the most intense band caused… More >

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