S. Petrosyan^a,*, A. Musayelyan^a, E. Zaretskaya^b, V. Gremenok^b,c, K. Buskis^b, A. Stanchik^b,c

Chalcogenide Letters, Vol.20, No.11, pp. 811-820, 2023, DOI:10.15251/CL.2023.2011.811

Abstract We present the results of the study of the microstructure, X-ray diffraction and Raman scattering spectra of Cu₂SnS₃ (CTS) films synthesized at 500℃ by the sulfurization of SnCu stacked metal precursors with different annealing time. The results indicate that sulfurization time has a great influence on both composition and morphology of the film. It is shown that the process of formation of a single-phase CTS compound with a monoclinic structure and composition close to stoichiometry is completed for a synthesis time of 60 - 80 min. With an increase in the time of synthesis to 120 More >

U. Chalapathi^a, P. R. Prasad^b, C. P. Reddy^c, S. Sambasivam^d, P. Rosaiah^e, M. Ouladsmane^f, S. Alhammadi^g, S. M. Lee^a, S. H. Park^a,*

Chalcogenide Letters, Vol.20, No.11, pp. 797-802, 2023, DOI:10.15251/CL.2023.2011.797

Abstract Wittichenite Cu₃BiS₃ thin films have received significant interest as light harvesters owing to their suitable optoelectronic properties and presence of earth-abundant, and non-toxic elements. We have synthesized Cu₃BiS₃ thin films by a two-stage process; in which, Cu/Bi/Cu metallic stacks were thermally evaporated and then sulfurized at 400℃ for 10–60 min in a quartz tubular furnace. The influence of sulfurization time on the structural, microstructural, compositional, optical, and electrical properties of the films was investigated. The results revealed that the films were orthorhombic Cu₃BiS₃ with the following lattice parameters: a = 0.768 nm; b = 1.043 nm; and More >

K. A. Mohammed^a,*, R. A. Talib^b, B. Bhavani^c, N. H. J. Al Hasan^d, A. Kareem^e, F. H. Alsultany^f, R. S. Zabibah^g, M. A. Alkhafaji^h, S. Sharma^i,j

Chalcogenide Letters, Vol.20, No.11, pp. 789-796, 2023, DOI:10.15251/CL.2023.2011.789

Abstract CdZnS thin films created via chemical bath deposition were examined to see how Cu doping affected their characteristics. Cu ions were added to the films in order to change their optical, structural, and morphological characteristics. These findings suggest that Cu doping can be used to modify the optical characteristics of CdZnS thin films. By using Xray diffraction (XRD) and the energy dispersive analysis of X-ray method (EDAX), we were able to investigate the compositional ratio as well as the structural features of the films. The field emission scanning electron microscopy (FESEM) technique was utilized in More >

P. Sateesh^a,*, A. Raveendra^b,*, M. Ashok^c, S. S. Sivaraju^d, K. Umadevi^e, N. Rajeswaran^f

Chalcogenide Letters, Vol.20, No.11, pp. 779-787, 2023, DOI:10.15251/CL.2023.2011.779

Abstract In the present work, SnS thin films were prepared using the CBD technique at room temperature and varying annealing temperaturesfrom300 to 450 °C for photo detector applications. The prepared samples were characterized using different techniques for analyzing the structural, optical, morphological, and photo sensing properties of the samples. From XRD analysis, the diffraction pattern of all the prepared thin films shows the pristine SnS phase of the samples possessing an orthorhombic phase without the presence of any impurity phases. Among the fabricated thin films, the SnS thin film annealed at a temperature of 350 °C… More >

M. N. Abdel-Salam^a, N. Sabry^b, E. S. Yousef^c,d, E. R. Shaaban^a,*

Chalcogenide Letters, Vol.20, No.11, pp. 759-777, 2023, DOI:10.15251/CL.2023.2011.759

Abstract This study focused to prepare poly-crystalline (ZnSe)_1-xCu_x thin films, where x values vary from 0 to 0.1 %. the effect of Cu ratios dopant on structural, phases and optical properties has been investigated. As prepared thin films were deposited onto a cleaning glass substrate under high vacuum conditions (10^-7 mbr) at room temperature using the “ evaporation technique”. The analysis results according to data of the X-ray diffraction technique of all films refer to the growth polycrystalline with hexagonal wurtzite structure of Zn-Se with no presence of any further phases. The changes in numerous parameters such… More >

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 >

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 >

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 >

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 >

SOBHA KOTA^*, RATNAKUMARI ANANTHA, VAYUNANDANA RAO GOVADA, PRADEEP DUMPALA

Journal of Polymer Materials, Vol.40, No.3-4, pp. 285-303, 2023, DOI:10.32381/JPM.2023.40.3-4.10

Abstract The exoskeleton of marine shrimp contains a natural, biocompatible polymer chitin, which is dumped as a waste. The study proposes the sustainable single-pot-extraction of chitosan from the waste and its use in the fabrication of wound-dressings, and thus leverage its piezoelectric, antioxidant, hypoglycaemic and medicinal properties in wound-healing. The Fourier transform infrared spectrum revealed that marine chitosan contains functional groups with N-O, O-H, and CO stretching. Scanning electron micrographs demonstrated the spherical and mesoporous structures of the extracted chitosan. X-ray diffraction analysis showed a semi-crystalline phase of chitosan particles with a mean size of 28.9… More >