One of the simple, versatile, and cost-effective methods for producing thin films with the desired quality is the chemical bath deposition (CBD) method. This process involves immersing a substrate in an aqueous solution containing the desired metal ions and a complexing or reducing agent. As the reaction continues, metal ions are deposited on the surface of the substrate and form a thin film. Based on this, in this research, firstly, the chemical bath deposition method was evaluated and studied.Then, using the chemical bath deposition method, thin films of zinc oxide were synthesized. In different stages of the experiment, it was tried to increase the quality of the thin films made by changing the experiment conditions. Deposition time as well as changing the type of precursor were among the parameters that were used to control the conditions and make optimal zinc oxide thin films.Finally, to examine and explore the samples using various methods such as scanning electron microscope (SEM), atomic force microscope (AFM), X-ray diffraction (XRD), and UV Visible Spectrophotometer were used to identify and measure the produced structures.Analysis of the structures with the help of identification and research methods all confirm the existence of zinc oxide thin films. Also, the results showed that with the increase in the deposition time, the energy band gap decreased with an increase in the thickness of the thin film. On the other hand, atomic force microscope images show growth processes such as island and layer-island growth.
