Structural and Optical Properties of Pure &Aluminium Doped ZnO Thin Films Prepared by Sol-Gel

Thin film of zinc oxide was prepared by spin coating on pyrex glass using zinc acetate dehydrate, 2-methoxyethanol and monoethanolamine (MEA) as a precursor, solvent and stabilizer respectively. Also, Aluminium-doped thin film of ZnO was prepared by using AlCl3. Deposited thin films were investigated for structural and optical properties using X-ray diffraction (XRD) and UV–VIS-NIR spectrophotometer respectively. Results of XRD prove that thin films have polycrystalline nature and possess typical hexagonal wurtzite structure. It is observed that compared to pure ZnO thin film, the grain size in the Al-doped thin film increases. Optical transmission spectrum illustrate that the thin films were transparent in the visible region and gets absorbed in the UV region.