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Properties of (CuO)1 x(ZnO)x thin films deposited by spray pyrolysis

L. HERISSI1,2,* , L. HADJERIS2, M.S. AIDA3, N. ATTAF4, S. SIOUANE1

Affiliation

  1. Department of Matter Sciences, Echahid Cheikh Larbi Tebessi University, Tebessa 12000, Algeria
  2. LMSSEF, Larbi Ben M’hidi University, Oum El Bouaghi 04000, Algeria
  3. Center of Nanotechnology, KAU University, Jeddah 22254, Saudi Arabia
  4. Phases Transformation Laboratory (LTPh), UMC Constantine1 University, 25000, Algeria

Abstract

The main goal of thiswork is the study of (CuO)1 x(ZnO)x metal oxide thin films to determine their applicability in optoelectronic devices. For this goal, films with a rough surface and good adhesion to the glass substrates with x = 0, 0.25, 0.50, 0.75 and 1, were deposited by spray pyrolysis technique at 450 °C. Copper (II) chloride dihydrate and zinc acetate dihydrate were used as precursors. Structural, optical, and electrical properties of the films have been studied.The obtained results indicate the formation of CuO and ZnO phases unite together primarily through intra-grain coupling mixed in defined proportions for intermediate compositions and the lattice constants of ZnO increase with the nominal fraction x of Zn. Also, there is an increase in the optical gap energy and electrical conductivity in contrast to the Urbach energy which indicates that the defect density decreases with the mixing of Zn into the host CuO lattice as well as the presence of ZnO phase. Furthermore, it was observed that optical transmittance of the as-deposited films increased with increasing the Znconcentration. Consequently, the optical absorption edge gradually shifted towards shortens wavelength side, resulting in the increase of band gap energy..

Keywords

Metal oxide thin films, Spray pyrolysis, Lattice parameters, optical gap energy, Electrical conductivity.

Submitted at: Nov. 1, 2024
Accepted at: Oct. 14, 2025

Citation

L. HERISSI, L. HADJERIS, M.S. AIDA, N. ATTAF, S. SIOUANE, Properties of (CuO)1 x(ZnO)x thin films deposited by spray pyrolysis, Journal of Optoelectronics and Advanced Materials Vol. 27, Iss. 9-10, pp. 483-490 (2025)