The thickness effect of ZnO thin films on optical Properties deposited by spray pyrolysis

Abstract

Much attention has been lead up the transparent conducting oxides (TCOs) in recent years due to their interesting physical properties, which combine electrical conductivity and optical transparency in the spectral range of the visible. Among these oxides zinc oxide ZnO is with the properties optical and electric has attracted the attention of researchers for a long time. In this work Zinc oxide thin films prepared by spray pyrolysis technique. A set of ZnO thin films were deposited with various deposition time, on glass substrate at 350 °C. The precursor solution is formed with zinc acetate in distilled methanol with 0.1 molarity. The deposition time was ranged from 2 to 8 min. The optical properties of those films were examined by ultraviolet-visible spectrometer (UV). ZnO thin films were highly transparent in the visible with the maximum transmittance of 85% and the optical band gap was found between 3.25 and 3.28 eV.