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International Journal of Natural Sciences Research

February 2016, Volume 4, 2, pp 15-28

Influence of Low Ag Doping on Structural, Morphological and Optical Properties of Sol-Gel Dip-Coated Nanostructured ZNO Thin Films

M. Dehimi


T. Touam


A. Chelouche


F. Boudjouan


A. Bouasla


D. Djouadi


A. Fischer


A. Boudrioua


A. Doghmane

M. Dehimi 1 T. Touam 1 ,

A. Chelouche 3 F. Boudjouan 3 A. Bouasla 1 D. Djouadi 3 

A. Fischer 7 A. Boudrioua 7 A. Doghmane 1 

  1. Semiconductors Laboratory, University of Badji Mokhtar-Annaba, Algeria 1

  2. Environmental Engineering Laboratory, University of Bejaia, Algeria 3

  3. Laser Physics Laboratory CNRS UMR 7538, University of Paris 13, Sorbonne Paris City, Villetaneuse, France 7

Pages: 15-28

DOI: 10.18488/journal.63/2016.4.2/

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In the present study, a sol-gel dip-coating process was used to deposit almost stress free highly c-axis oriented nanostructured ZnO thin films on glass substrates. The effects of low silver doping concentration (Ag ? 1 at.%) on the structural, morphological and  optical properties of such films were investigated using different characterization techniques. X-ray diffraction (XRD) measurements have revealed that all the ?lms were single phase and had a hexagonal wurtzite structure. The grain size values were calculated and found to be about 24-29 nm. Scanning electron microscopy (SEM) and atomic force microscopy (AFM) images have shown that film morphology and surface roughness were influenced by Ag doping concentration. Optical properties such as transmittance and optical bandgap energy (Eg) were examined using UV-Visible spectrophotometry. The results have indicated that all the prepared ?lms were highly transparent with average visible transmission values ranging from 80% to 86%. Moreover, it was found that the Ag contents leads to widening of the bandgap.

Contribution/ Originality
This study is one of very few studies which have investigated the preparation of low Ag-doped ZnO thin films by the sol-gel dip-coating technique. It was put into evidence that incorporation of low Ag concentrations (Ag ? 1 at.%) in ZnO can indeed improve its physical properties.




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