2024/03/30 by Adesiji, Nkiruka Eunice
#Energy bandgap #UV-Visible spectrometry #ZnS #pH
paper · doi:10.60787/tnamp-19-141-146
The effect of varying pH on the optical and electrical properties of electrodeposited ZnS has been studied. The electrical parameter were studied using the Photoelectrochemical (PEC) cell while the optical parameters were studied using the UV-Visible spectrophotometry technique for wavelength range 400 – 1900 nm. Visual examination revealed that the colour of the ZnS thin films became lighter as the pH reduced. High transmittance, which decreases with increase in the pH were observed at the visible and near infrared regions. The values of the energy bandgaps decreases as the pH values decrease, an indication that the transmittance of the ZnS thin film decreased with decreased pH. The average current density and thickness of the thin films decreased with increasing pH while the thin films were all p-type in electrical conductivity which shows that variation in the pH did not have any significant effect on the conductivity type of the films.