An Impedance Study of Electrodeposited Lead Sulfide Semiconductor

During recent years semiconductors have attracted considerable attentions as electrodes in photoelectrochemical cells. Lead sulfide is an interesting semiconductor due to its variety of applications such as IR detectors, and solar applications. It’s bulk band gap energy is about 0.41 eV. Since phenomena related to the semiconductor │ electrolyte interface are still not well understood, a variety of electrochemical techniques are usually employed [1].Among these, impedance spectroscopy is a suitable technique,because of it’s sensitivity and many possible applications. In the present work, the interfacial properties of electrodeposited PbS in dark and under light illumination have been studied and Mott-Schottky plots are discussed.