The Study of the Effect of Nickel Doping in some Optical Properties of Silver Sulfide (Ag2S) Films Prepared by Chemical Bath Deposition

Abstract

Thin films of transparent semiconducting silver sulfide (Ag₂S) were deposited by chemical bath deposition technique on glass substrates. Additionally, ni-doped Ag2S thin films were deposited in doping percentage of (Ni2% - Ni4% - Ni8%). UV-VIS spectroscopic analysis showed that the transmittance in all films had a minimum in the ultraviolet range within the range (300-350) nm, with the lowest value of 5% in the pure film, which then increases rapidly with wavelength to reach 70%. The absorbance of all film exhibited a peak in the ultraviolet field within the range (300-350) nm, with the highest value is 1.3% in the pure film, and then decrease rapidly as the wavelength increased reaching 0.2%, and the transmittance decreases and the absorbance increases with the increase in doping percentage. Energy gap values ​​range within the (2.12-2.23) eV, with the highest value observed in the pure film.