Boudeffa , Asma ; Daira ,R2024-10-302024-10-302024http://dspace.univ-skikda.dz:4000/handle/123456789/3144In the present work, the structural, optical and electrical properties of Li-doped (0-6 at.%) cupric oxide thin films were investigated. The films were obtained by the spray pyrolysis method on glass substrates at 450°C. The X-ray diffraction method, UV-Vis. spectroscopy and the four-point probe technique were used to analyze the films. According the XRD investigations, it was found that the polycrystalline films have monoclinic phases with a preferred (002) and (-111) crystallographic planes. The incorporation of Li doping into the CuO thin film yielded crystallite sizes of approximately 12 nm. The estimated optical band gap values are decreased with increasing Li concentration from 1.88 to 1.64 eV. Four-point probe studies revealed that the resistivity of the films decreased from 339 to 186 KΩ.cm with increasing Li concentration.enMasters degree thesis