  Zinc oxide thin films were deposited by ultrasonic spray pyrolysis technique
using different Zinc precursors: Zinc acetate, Zinc nitrate and zinc chloride
with different molarities. All deposited films were characterized by various
techniques such as X-ray diffraction to determine the films structure, the
scanning electron microscopy SEM for the morphology of the surfaces and UV
visible spectroscopy to determine the optical proprieties.The obtained results
indicated that ZnO nano-crystalline films have a hexagonal structure at type
wurtzite for all Zinc precursors. Films deposited with zinc acetate are
characterized by a smooth surface, dense network and high transparency, while
films deposited with zinc chloride and Zinc Nitrate have a better crystallinity
and low optical transmittance.
