Abstract

Lead substituted zinc oxide thin films were deposited onto the glass substrates at 400 ^oC by spray pyrolysis technique. The influence of lead substitution concentration (0–25 wt. %) on the structural, morphological and optical properties of zinc oxide thin films were studied. X-ray diffraction (XRD) analysis confirms that all the films have a typical hexagonal wurtzite structure having high preferred orientation along (002) crystallographic direction. The Scanning Electron Microscopy (SEM) reveals the deterioration of crystallinity as we increase the substitution percentage. The average transmittance is maximum for 25 wt. % ZnO:Pb∼93% in the visible region (400–800 nm). Optical band gap energy has a slight increase from 3.21 eV to 3.36 eV.

Keywords

Thin films, Spray pyrolysis, Optical transmittance