Physical properties of Pb doped ZnS thin films prepared by ultrasonic spray technique

•The ZnS thin films were deposited with different Pb doping concentration (0.5, 1, 1.5, and 2 at.%).•The X-ray diffraction analysis indicates that the deposited films are polycrystalline related to cubic and hexagonal structure.•The films had a strong preferred orientation, it is (111) plane.•The films are good transparent (60% to 70%), and the shift of optical transmittance showing the decrease of optical band gap.•All the films of ZnS:Pb showed high resistivity.