STUDIES OF SOME ELECTRICAL AND PHOTOELECTRICAL PROPERTIES FOR PbS FILM OBTAINED BY SONOCHEMICAL METHODS

摘要

The effect of ultrasounds and thermal treatments on the deposition of PbS films on glass substrates and the characteristics of formed films was studied. Ultrasounds increase the reaction rate leading to obtaining thicker films, with smaller electrical resistance. The photosensitivity decreases for the majority of samples obtained from ultrasonic baths, in comparison with those obtained for the control films obtained in the same conditions, without ultrasounds. Thermal treatments at 90 oC, applied to the films, leads to the increasing of electrical resistance and of photosensitivity respectively. The best results were obtained for the sample obtained by the deposition of two layers for 45 minutes from static baths