Ke Shen^1,2,*, Dan Zeng^1,2, Changhao Wang¹, Lei Wang¹, Yuliang Dong¹

Frontiers in Heat and Mass Transfer, Vol.23, No.6, pp. 1957-1980, 2025, DOI:10.32604/fhmt.2025.070396 - 31 December 2025

Abstract Ice accretion on aircraft poses a critical threat to flight safety by significantly altering aerodynamic performance. This study presents a novel numerical framework for ice accretion prediction, developed by extending the Myers model and incorporating an advanced multi-step approach. The proposed framework integrates ice layer growth into the modeling of unsteady water film dynamics and introduces a revised criterion for determining the icing condition. A multi-step scheme, accounting for the continuous variation of physical parameters, is implemented to enhance computational accuracy. The framework is validated through simulations on both 2D and 3D configurations. For the… More > Graphic Abstract

P. Kaushik^a,*, A. Devi^b, H. Singh^a

Chalcogenide Letters, Vol.22, No.3, pp. 197-204, 2025, DOI:10.15251/CL.2025.223.197

Abstract The structural properties of bulk as well as thin films of nanostructured Bi₁Te₁₅Se_84-x Pb_x (0 ≤ x ≤ 8) glassy alloys has been studied in this paper. Conventional melt quenching method is employed to prepare the samples of Bi₁Te₁₅Se_84-x Pb_x (0 ≤ x ≤ 8) alloys. Thin films with thickness of approximately 158nm of the obtained bulk compositions were deposited on dry cleaned glass substrates by thermal evaporation technique. The structural characterization was carried out using XRD and SEM. Energy dispersive X-ray spectroscopy (EDX) indicates that samples are nearly stoichiometric. X-ray diffraction patterns indicate that they are More >

S. N. Garibova^a,b,*, А. I. Isayev^a, S. A. Rzayeva^a, F. N. Mammadov^c

Chalcogenide Letters, Vol.22, No.1, pp. 1-9, 2025, DOI:10.15251/CL.2025.221.1

Abstract The structure particulars of amorphous Ge2Sb2Te5 thermally evaporated on glass substrates, as well as films annealed at temperatures of 500 and 700 K have been studied by the considering of experimentally established facts obtained from X-ray analysis and Raman spectroscopy measurements. The Debye-Scherrer and Williams-Hall methods were applied to the X-ray diffraction data for estimate the size of crystallites, interatomic distances, dislocation density and structure distortion degree. The features of heat treatment effect on numerical values of the above quantities at a given temperatures have been established. The analysis of the spectral distribution of Raman… More >

S. Çelik^a,*, M. Temiz^b

Chalcogenide Letters, Vol.22, No.1, pp. 89-96, 2025, DOI:10.15251/CL.2025.221.89

Abstract In this study, PbZnS thin films with varying concentrations of lead (Pb) and zinc (Zn) were successfully produced using the spray pyrolysis method. The structural, optical and surface properties of the films were systematically investigated as a function of the Pb/Zn ratio. Xray diffraction (XRD) analysis confirmed the polycrystalline nature of the films, showing a cubic zinc blende structure with improved crystallinity as Pb content increased. Initially, with the increase in Pb concentration, larger crystallite sizes and decreased microstress were observed, but with the increase of Pb addition, the formation of secondary phases and the… More >

R. I. Jasim^a, E. H. Hadi^a, A. A. Mansour^b, S. A. Hussein^c, S. S. Chiad^a,*, N. F. Habubi^d, Y. H. Kadhim^e, M. Jadan^f,g

Chalcogenide Letters, Vol.22, No.1, pp. 43-55, 2025, DOI:10.15251/CL.2025.221.43

Abstract Using chemical bath deposition (CBD) methods and various molarities, nanostructured CdS thin films were developed. XRD assured that these films were cubic polycrystalline, containing larger grains as the solution's concentration of cadmium ions increased. Dislocation density values dropped from 79.32 to 62.90 as a result, nevertheless. Also, the strain is lowered from 30.88 to 27.50. AFM results demonstrate that these films suffer a decrease in the value of average particle size, root mean square, and roughness with the molarity concentration. SEM images show CdS thin films at various molarities (0.10, 0.15, 0.20) M, indicating reduced More >

K. Kannan^a,*, B. Manjunatha^b, T. Marimuthu^c, P. Sangeetha^d

Chalcogenide Letters, Vol.22, No.2, pp. 167-175, 2025, DOI:10.15251/CL.2025.222.167

Abstract Cadmium sulfide (CdS) thin films are extensively utilized as a window layer in photovoltaic (PV) devices due to their high transmittance, suitable bandgap, and favorable electrical properties. This work presents a comprehensive performance analysis of CdS based thin films in PV applications, examining key factors such as optical, electrical, and structural properties. The bandgap (approximately 2.42 eV) allows effective photon transmission, reducing energy losses. Critical performance metrics, including film thickness, grain size, crystallinity, and interface quality with the absorber layer, are optimized to enhance charge separation and minimize recombination losses. The study highlights the balance More >

F. Saker^a,*, L. Remache^a, D. Belfennache^b, K. R. Chebouki^a, R. Yekhlef^b

Chalcogenide Letters, Vol.22, No.2, pp. 151-166, 2025, DOI:10.15251/CL.2025.222.151

Abstract In this work the chemical bath deposition (CBD) method was used to synthesize Cadmium sulphide (CdS) thin films on glass, silicon (Si), and porous silicon (PSi) substrates. The PSi substrates were prepared by an electrochemical etching method using different current densities at constant etching time of 5 minutes. The CdS thin films were characterized using the X-ray diffraction (XRD), scanning electron microscopy (SEM), atomic force microscopy (AFM), optical transmittance spectroscopy in the Uv visible range, and electrical characterization (I–V characteristics). The obtained results demonstrated that the morphology of the deposited materials was influenced by the… More >

A. G. Kumar^a,*, V. K. V. Krishna^b, A. P. Lingaswamy^c, S. Masma^d, G. Prathibha^e, G. Sujatha^f, P. S. Kumar^g, T. V. Kumar^h, J. V. V. N. K. Raoⁱ, B. H. Rao^a

Chalcogenide Letters, Vol.22, No.2, pp. 143-149, 2025, DOI:10.15251/CL.2025.222.143

Abstract SnS thin films doped with two atomic % Ag are deposited on a pyrex glass substrates using chemical bath deposition method. The impact of 2 atomic % silver doping on the physical properties of SnS thin films is studied. X-ray diffraction studies confirmed that the deposited SnS films were of α-SnS phase with an orthorhombic crystal structure, which remained stable despite the addition of 2 at.% silver. It is observed that the addition of 2 atomic % silver to SnS chemical bath solution does not greatly influence the structural properties of SnS thin film. The More >

A. Ledesma-Juárez^a, J. F. Quintero-Guerrero^b, A. M. Fernández^a,*

Chalcogenide Letters, Vol.22, No.2, pp. 97-108, 2025, DOI:10.15251/CL.2025.222.97

Abstract The evaporation technique fabricates solar cells using the Cu(In, Ga)Se₂ (CIGS) absorber. This technique has strong limitations in preparing this absorber in a large area, necessitating the electrodeposition technique. However, the morphology and crystallinity of this absorber need to be sufficiently adequate to guarantee proper collection of charge carriers since a cauliflower-type growth is favored. This underscores the need for modifications during the synthesis, thermal treatments, and post-synthesis to improve the morphology and crystallinity, a complex and significant aspect of our research. This work discusses the structural, atomic composition, morphological, and optical results obtained for samples More >

A. Z. Mahmoud^a,b, L. G. Amin^c,*, S. A. Mahmoud^d, M. M. Bashier^e, M. E. M. Eisac^e, N. Dhahri^c, A. Mohamed^e, A. A. Al-Dumiri^c, S. E. I. Yagoub^c, M. A. Abdel-Rahim^b

Chalcogenide Letters, Vol.22, No.4, pp. 441-450, 2025, DOI:10.15251/CL.2025.224.441

Abstract The electrical and structural characteristics of Bi_xSe_100-x glasses (where x=5, 10, 15, and 25 at. %) were systematically investigated. Using the traditional Quenching of melts process, the amorphous Bi_xSe_100-x materials were created. Thin films of Bi_xSe_100-x have formed onto ultrasonically glass substrates that have been cleaned using thermal evaporation in a vacuum of approximately 10^-5 Torr. Here we show and discuss the results of four bulk glasses of Bi_xSe_100-x (where x=5, 10, 15, and 25 at. %) that were subjected to differential thermal analysis (DTA) under non-isothermal conditions. For the compositions under consideration, five separate methods were used More >