Investigations on the physical properties of the polycrystalline ZnS thin films deposited by the chemical bath deposition method

• Published in: Journal of crystal growth Vol. 299; no. 1; pp. 136 - 141
• Main Authors: Göde, F., Gümüş, C., Zor, M.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01-02-2007; Elsevier
• Subjects: A1. Optical properties; A1. X-ray diffraction; A3. Chemical bath deposition; B1. Zinc sulfide; B2. Electrical properties; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Growth from solutions; Ii-vi semiconductors; Liquid phase epitaxy; deposition from liquid phases (melts, solutions, and surface layers on liquids); Materials science; Methods of crystal growth; physics of crystal growth; Methods of deposition of films and coatings; film growth and epitaxy; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Optical properties of specific thin films; Physics; Single-crystal and powder diffraction; Structure of solids and liquids; crystallography; X-ray diffraction and scattering; 61.10.Nz; 73.61.−r; A3. Chemical bath deposition; 78.20.−e; 78.66.Hf; A1. Optical properties; B1. Zinc sulfide; B2. Electrical properties; A1. X-ray diffraction; 81.10.Dn; Band structure; Zinc sulfides; pH value; Chemical bath deposition; 61.10.Nz; 78.20.-e; 78.66.Hf; 81.10.Dn; 73.61.-r; Interference; Polycrystals; Diffraction pattern; XRD; Acetates; Physical properties; Thin films; Energy gap; Wavelengths; Energy dispersive X-ray analysis; Optical properties; Crystal growth from solutions; Thiourea; A1. Optical properties; A1. X-ray diffraction; A3. Chemical bath deposition; B1. Zinc sulfide; B2. Electrical properties
• ISSN: 0022-0248; 1873-5002
• DOI: 10.1016/j.jcrysgro.2006.10.266

Transparent and polycrystalline zinc sulfide (ZnS) thin films were prepared by the chemical bath deposition (CBD) technique onto glass substrates deposited at 80
°C using aqueous solution of zinc acetate, thiourea, triethanolamine and tri-sodium citrate at a pH of about 10.55. Triethanolamine and tri-sodium citrate were used as complexing agents. The thickness of the films, which were calculated from the interference patterns around 400–800
nm maxima and minima wavelengths, varied from 403 to 934
nm in the visible range. UV–visible spectrophotometric measurement showed transperancy from 66% to 87% of the films with a direct allowed energy band gap in the range of 3.79–3.93
eV. X-ray diffraction (XRD) patterns prove crystallinity of deposited films that crystallize in the hexagonal phase of ZnS. The ZnS thin films were characterized by XRD, energy dispersive X-ray analysis (EDX) and optical absorption spectra. The current–voltage characteristic of polycrystalline ZnS films grown by CBD are reported.