An investigation of structural, electrical and optical properties of metal free-Zinc Oxide Thin Films Using Spray Pyrolysis Sol-Gel Techniques

This study focuses on the fabrication of pure ZnO thin films via the Spray pyrolysis Deposition technique on glass substrates. By adjusting both concentration and spray cycles during deposition, a comprehensive analysis of the resulting films structural, optical, morphological, and electrical characteristics was conducted. Notably, promising outcomes were achieved leading to transparent and high conductive structure without the need for metal doping. Most performant result were obtained using structure from 0.04 mole solution, yielding an optical transparency of 60.55%, electrical conductivity of 20.6 Ω-1cm-1, a mobility of 5.87 cm2/Vs, and an optical bandgap of 3.50 eV. Structural analysis performed via XRD showed hexagonal polycrystalline Wurtzite structure with favored (002) orientation. These findings suggest that ZnO thin films hold the potential for applications in optoelectronic devices