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M. A. Sadi^a,*, A. Mahmood^b, W. Al-Masry^b, C. W. Dunnill^c, N. Mahmood^d
Chalcogenide Letters, Vol.21, No.12, pp. 965-976, 2024, DOI:10.15251/CL.2024.2112.965
Abstract The device which combines the outcomes supercapacitor (SC) and battery is known as supercapattery. Due to their high conductivity, sensitivity, and storage capacity, carbon nanotubes have drawn attention in energy storage (EES) applications. To achieve highperformance supercapattery, this study used an electrode based on carbon nanotubes (CNTs) and manganese magnesium sulfide (MnMgS). It showed 963 C/g specific capacity which is significantly greater than the reference sample's value of 1 A/g. The supercapattery is engineered using the CNT-doped MnMgS electrode (MnMgS/CNT//AC), which has a specific capacity (C_s) of 268 Cg^-1 at 1 Ag^-1 current density. A significantly higher More >

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Z. Liu^a,*, K. Li^b, Y. Sun^c, R. X. Wang^a
Chalcogenide Letters, Vol.21, No.12, pp. 977-988, 2024, DOI:10.15251/CL.2024.2112.977
Abstract Through conventional solid-state sintering process, PbNb₂O₆:Yb³⁺, Ln³⁺ (Ln³⁺=Er³⁺/Ho³⁺) ceramics have been fabricated. The structural information of synthesized ceramics was obtained via X-ray diffraction. Scanning electron microscopy was utilized to investigate their morphological properties. The investigation of upconversion photoluminescence properties of the synthesized ceramics was conducted by analyzing upconversion emission spectra upon excitation with 980 nm light. Power dependence studies confirmed the presence of two-photon absorption processes in both PbNb₂O₆:Yb³⁺, Er ³⁺ and PbNb₂O₆:Yb³⁺+, Ho³⁺ ceramics. Temperature-dependent experiments from 303 K to 513 K demonstrated significant variations in emission intensities and fluorescence intensity ratios (FIR), enabling the assessment of temperature More >

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A. S. Ahmed^*, A. B. Sharba, Q. M. Salman
Chalcogenide Letters, Vol.21, No.12, pp. 989-999, 2024, DOI:10.15251/CL.2024.2112.989
Abstract This work presents the synthesis and characterization of Homophase CdS and Heterophase Fe/CdS nanoparticles prepared by pulsed laser ablation (PLA) in water and methanol using nanosecond duration Nd:YAG laser. The morphology, the crystalline state, and the structure of the products were examined by performing SEM, XRD, and FTIR measurements, respectively. The results showed the transformation of the crystalline phase and changing the clustering size of CdS nanoparticles when performing PLA in methanol and water. Fe/CdS Heterojunctions were obtained in both liquids. The presence of Fe nanoparticle imposed another phase transformation and significantly improved the aggregation More >

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R. Gayathri^a, S. Shanmugha Soundare^b, K. Haritha^a, S. Ariponnammal^a,*
Chalcogenide Letters, Vol.21, No.12, pp. 1001-1009, 2024, DOI:10.15251/CL.2024.2112.1001
Abstract SnSO₃/ZnSO₃ nanocomposite has been synthesized using the hydrothermal process. The complete formation of the SnSO₃/ZnSO₃ nanocomposite is confirmed by XRD and EDAX. It displays a fascinating rectangular bar shape. The measured particle size is 100.4 nm. It will be a promising option for optoelectronic devices. Energy gap of the SnSO₃/ZnSO₃ nanocomposite is 5.85 eV. The refractive index of the nanocomposite through its energy gap is found to be 1.883. The ultraviolet (~387.2 nm) area of the PL emission spectrum exhibits the strong efficient emission, while the green (~522.1 nm) region and the red (~789.4 nm) region show More >

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R. A. Ulwali^*, N. K. Abbas
Chalcogenide Letters, Vol.21, No.12, pp. 1011-1020, 2024, DOI:10.15251/CL.2024.2112.1011
Abstract Pure zinc sulfide nanoparticles and doped with silver (0.5,1,1.5,2.5, and 3.5) % wt. were prepared by green method. The structural properties were studied using X-ray diffraction technology(XRD). The diffraction patterns showed the particles were crystalline and had a zinc-blend structure with different average grain size. The surface topography was investigated by Scanning Electron Microscope (FE-SEM), it was found the shape is spherical and had different nanosized. Chemical purity was studied using Energy Dispersive X-ray Spectroscopy(EDX), the results showed the appearance of basic elements (Zn, S) and silver. The results of Fourier Transform Infrared Spectroscopy(FTIR) showed More >

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L. M. Pu^a,*, S. G. Pei^a, X. H. Tang^a, Z. Yin^b, H. J. Hou^b, H. L. Guo^c
Chalcogenide Letters, Vol.21, No.12, pp. 1021-1034, 2024, DOI:10.15251/CL.2024.2112.1021
Abstract The structural parameter, elastic anisotropy, and thermal properties of cubic MgIn₂S₄ under pressures is examined using first principles techniques. The determined lattice constant exhibits a high level of concurrence with the values reported in existing literature. Based on the mechanical characteristics, there is an observed enhancement in both ductility and anisotropy of MgIn₂S₄ under increased pressure. The investigation focuses on the thermal characteristics, encompassing the impact of temperature and pressure on key parameters such as Debye temperature, Grüneisen constant et al. More >

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L. N. Ibrahimova^a,b, Kh. N. Ahmadova^c,d,e, M. E. Aliyev^b, Y. I. Aliyev^f,g,*
Chalcogenide Letters, Vol.21, No.12, pp. 1035-1039, 2024, DOI:10.15251/CL.2024.2112.1035
Abstract In this research, we investigated the optical properties of CdSe thin films on glass substrates using spectroscopic ellipsometry. The samples were analysed using an M-2000 rotation compensator spectroscopic ellipsometer at room temperature, covering a photon energy range of 1.5-7.0 eV. We used an appropriate dispersion model to obtain the spectral dispersion of the optical constants. We calculated the thickness, dielectric permittivity (real and imaginary parts), refraction, and extinction coefficients of the thin layers. The results showed high transparency that varied with the size of the CdSe thin films. Additionally, we determined the bandgap width for More >

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