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Preparation and characterization of nanostructured Cu-doped ZnO thin film

H. EL MAROUAZI1,* , A. EL HICHOU2

Affiliation

  1. Institut de Chimie et des Procédés pour l’Energie, l’Environnement et la Santé, CNRS/Université de Strasbourg, 25, rue Becquerel 67087 Strasbourg Cedex 2, France
  2. IMED-Lab. : Groupe d’Étude des Matériaux Optoélectroniques (G.E.M.O), Faculté des Sciences et Techniques, Université Cadi Ayyad, Av. A. Elkhattabi, BP 549, 40000 Marrakech, Morocco

Abstract

A sol-gel deposition route combined with a spin-coating process was utilized to fabricate undoped and doped Zinc oxide thin films on glass substrates with different copper concentrations ranging between 0 % and 10 mol%. XRD, SEM, and UV-vis spectral investigations were used to illustrate the structural features and optical behavior. The structural properties of ZnO films were directly influenced by copper doping. The variation of the copper ratio leads to the different behavior of all films' structural features. Moreover, the optical properties of all copper doped films confirm two distinct regions around 5 % of Cu. In conclusion, a copper doping concentration ratio higher than 5 % deteriorates all the films' structural and optical properties, suggesting that 5% of Cu is the maximum doping ratio. In comparison, 3% of Cu (where Eg= 3.240 eV) was the optimum sample for practical applications like transparent conductive oxide (TCO)..

Keywords

Zinc oxide, Copper, Sol-gel, Coating, Thin films, Optical properties.

Submitted at: April 4, 2022
Accepted at: June 9, 2023

Citation

H. EL MAROUAZI, A. EL HICHOU, Preparation and characterization of nanostructured Cu-doped ZnO thin film, Journal of Optoelectronics and Advanced Materials Vol. 25, Iss. 5-6, pp. 289-293 (2023)