Studies on electrodeposited silver selenide thin film by double exposure holographic interferometry

Silver selenide (Ag2Se) thin film has been electrodeposited at room temperature from an aqueous acidic bath containing silver nitrate (AgNO3) and selenium dioxide (SeO2) as precursor salt with ethylene diamine tetra-acetic acid (EDTA) as a complexing agent. The electrodeposition of Ag2Se thin film was carried out by varying the time of deposition. The influences of preparative parameters on growth of Ag2Se thin film have been studied. This electrodeposited film has been characterized by X-ray diffraction (XRD) for their structural studies. Surface morphological study of Ag2Se thin film was carried out by scanning electron microscope (SEM). The determination of thickness and stress of the Ag2Se thin film was carried out by double exposure holographic interferometry (DEHI) technique. Band gap of Ag2Se thin film was calculated by using UV–vis spectrophotometer.