Influence of the Reaction Temperature on Cd1-xZnxS Thin Films with Chemical Bath Deposited
Cd1-xZnxS thin films were deposited on soda-lime glass substrates with chemical-bath deposition (CBD) using cadmium acetate, zinc sulfate, thiourea, ammonia and ammonium acetate aqueous solution at different with stirring. All the samples were annealed at 200 °C for 60 min in the air. The crystal structure, surface morphology, thickness and optical properties of Cd1-xZnxS thin films with increasing ammonia concentration were studied with X-ray diffraction (XRD), scanning electron microscopy (SEM), step height measurement instrument and spectrophotometer respectively. The results revealed that Cd1-xZnxS thin films had cubic crystal structure and the intensity of the diffraction peak decreased gradually as reaction temperature rose and the average crystal size was from 7.0 nm to 8.9 nm. All of Cd1-xZnxS thin films had a granular surface with some smaller pores. The Cd1-xZnxS thin films band gap was from 2.68 eV to 2.83 eV. The transmission of film deposited at 80 °C was highest. The suitable reaction temperature was from 70 °C to 80 °C.