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Investigation of the Doping and Withdrawal Speed Effect on the Properties of sol–gel Dip-coated Cu-Doped ZnO Thin Films

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Abstract

Cu-doped ZnO nanofilms were prepared by sol–gel process using zinc acetate dihydrate, Copper (II) chloride dihydrate as a precursor and ethanol as solvent. The influence of Cu-doping concentration (2 wt%, 5 wt% and 7 wt%) and withdrawal speed of the dip coating process (20, 50 and 100 mm/min) on the structural, morphological and optical properties of the nanofilms have been investigated. The prepared films were characterized by x-ray diffraction (XRD), atomic force microscopy, scanning electron microscope (SEM), energy dispersive x-ray spectroscopy (EDS), and UV–visible. The XRD patterns show the typical hexagonal ZnO in the (002) plane, and the crystallite size of the doped film increases with the doping concentration and withdrawal speed. The SEM images show that the morphological surface of the films was affected by Cu doping. The successful doping of ZnO films with Cu was confirmed by the EDS analysis. The transmittance considerably decreases accompanying increase in the Cu concentration, and increases as the withdrawal speed increases from 20 to 100 mm/min. The optical band gap of pure and Cu-doped ZnO was found to decrease from 3.25 to 3.18 eV as the withdrawal speed increased.

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Acknowledgements

This work was carried out in Active Components and Materials Laboratory, University of Oum El Bouaghi, Algeria. The authors are grateful to Director of the laboratory of materials and structure of electromechanical systems and their reliability (LMSSEF) of Oum El Bouaghi University, Algeria, for X-ray diffraction analysis.

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Authors and Affiliations

  1. Electrical Engineering Department, Oum El Bouaghi University, Oum El Bouaghi, Algeria

    Benkara Salima

  2. Laboratory of Active Components and Materials, Oum El Bouaghi University, Oum El Bouaghi, Algeria

    Benkara Salima

  3. Department of Electrical Engineering, Faculty of Sciences and Technology, University of Echahid Cheikh Larbi Tebessi, Tebessa, Algeria

    Bouabida Seddik

  4. Physic Department, Oum El Bouaghi University, Oum El Bouaghi, Algeria

    Seghairi Nassima

  5. Laboratory of Physico and Chemical Studies Materials (LEPCM), Faculty of Materials Science, University Batna1, Batna, Algeria

    Ghamri Houda

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  1. Benkara Salima
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Salima, B., Seddik, B., Nassima, S. et al. Investigation of the Doping and Withdrawal Speed Effect on the Properties of sol–gel Dip-coated Cu-Doped ZnO Thin Films. Trans Indian Inst Met 77, 1195–1203 (2024). https://doi.org/10.1007/s12666-023-03242-3

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