Structural, Optical and Morphological Studies of WO₃ Thin Films Prepared by Pulse Electrodeposition (50:50) Method

Abstract

Tungsten oxide (WO₃) thin films were successfully deposited on indium tin oxide (ITO) coated glass substrates using a pulse electrodeposition method. Peroxotungstic acid (PTA) precursor solution was synthesized by the controlled reaction of tungsten metal powder with hydrogen peroxide. The prepared films were characterized using X-ray diffraction (XRD), UV–Visible spectroscopy, and scanning electron microscopy (SEM) to investigate their structural, optical, and surface morphological properties. XRD study shows that the as deposited WO₃ samples are amorphous. Confirmation of material is from the micro-Raman study. Optical studies revealed high transparency in the visible region with a well-defined absorbance edge. Scanning electron microscope (SEM) micrographs showed uniform and compact surface morphology. These results demonstrate that the pulse deposition technique is an effective and low-cost method for the fabrication of high-quality WO₃ thin films suitable for optoelectronic and electrochromic applications.