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Studies of physical properties of the Al doped ZnO thin films prepared by sol-gel method associated with spin coating. In this work, thin films of ZnO intrinsic and doped Al are prepared by sol-gel technique associated with spin-coating onto glass substrates. Zinc acetate dehydrate, ethanol and mono-ethanolamine were used as a starting material, solvent and stabilizer, respectively. The structural, electrical and optical properties of the prepared films were analyzed by X-ray diffraction, transmittance, absorbance spectra and Photoluminescence spectroscopy respectively. All films are polycrystalline with a hexagonal wurtzite-type structure with a preferential orientation according to the direction . The 4-points technique used to characterise electrically. All films exhibit a transmittance above 80-90 % along the visible range up to 650 nm and a sharp absorption on set about 375 nm corresponding to the fundamental absorption edge 3.3 eV. Intense UV photoluminescence is observed for intrinsic ZnO film.

Etude des propriétés physiques des couches minces de ZnO dopées Al,préparées par la méthode de « sol-gel » associée au « spin coating »