Electroplating Kinetic of Nanostructured Selenium Films from Citrate Bath

In this work; Cyclic-Voltammetry (CV) and Electrochemical Impedance Spectroscopy (EIS) were used to study the electrodeposition kinetic of selenium films in potentiostatic mode from aqueous solution containing dioxide sodium citrate at pH = 4.2. Semiconducting proprieties obtained deposits investigated by Mott-Schottky measurements whereas optical ones performed UV–Visible spectrophotometry. The morphological characterization was carried out using scanning electron microscopy (SEM). results showed that process bath occurred under diffusional regime as rate-limiting step. Deposition rate layers on platinum substrate is much superior than case ITO up a value 0.65 μg/cm2 s. HSeO3−/Se system becomes more rapid with increase temperature. Obtained are photoactive belong p-type semiconductors number charge carriers order 1021/cm3 energy band gap about 1.7 eV. grains electroplated have spherical forms, nanometric sizes strong adhesion surface.