Preparation of Zinc Selenide (ZnSe) Nanoparticles by Chemical bath deposition, Study the Surface Morphology and Optical Properties

Zinc Selenide thin films were deposited on a glass substrate by chemical bath deposition. The optical properties and annealing temperature at 250°C for 1 hour were observed, the results showed an increase in transmittance and an increase in the band gap after annealing. They were analyzed by XRD and revealed a polycrystalline structure; the results indicated that the samples exhibited a mixture of cubic and hexagonal structures. After annealing at 250°C, observed an increase in the intensity of the plans, a slight shift in the diffraction angles, and a decrease in the average crystal size. The elemental composition of the Zinc Selenide (ZnSe) films using EDX revealed the presence of other elements such as C, O, Si, S, Ca, Cl, Mg and Na in varying percentage which they indicate the presence of impurities during the preparation process.  Field Emission Scanning Electron Microscope observations were performed at different magnifications (15,000, 30,000, 60,000, and 120,000X). Zinc Selenide (ZnSe) nanoparticles were distributed in various sizes (21–35 nm) and exhibited a spherical shape.