Chemically deposited PbS films composition

This paper studies the composition and structure of the chemically deposited, thin lead sulphide films, from alkaline baths containing lead salts (II), thiourea and hydroxylamine hydrochloride. The films are made up of three lead sulphide, with an average width of 0.4166 mu m. The composition, the lead and sulphur concentrations respectively, were determined by chemical methods while the structure was established by X-ray, diffraction. The films obtained contain 14% S-2 as compared to the stoichiometric content of 13.37%. The lead content is of 76.08% versus the stoichiometric content of 86.63%. The p-type conduction corresponds to the experimental one, because of the lead shortage. The electrical and photoelectrical properties of the studied films were also determined The deposited PbS films have semiconductive properties and are photosensitive to IR radiations.