Synthesis of Co-doped Cu<sub>2</sub>O via Photoelectrodeposition

The superior optical and electronic properties of Cu₂O make it a promising semiconductor material for various applications. To enhance its performance, several approaches have been explored, including cobalt (Co) doping, which has been reported to improve light absorption, reduce crystal size, and enhance the crystallinity of Cu₂O. Moreover, the morphology of the material plays a crucial role in determining its functional performance. Photoelectrodeposition offers a unique advantage in tailoring material morphology through light-assisted deposition processes. Therefore, this study aims to investigate the effect of Co concentration on the crystallinity, structure, and morphology of Cu₂O synthesized via photoelectrodeposition. The results demonstrate the successful synthesis of pure Cu₂O and Co-doped Cu₂O phases. X-ray diffraction analysis indicates that Co atoms successfully substitute Cu atoms, leading to a reduction in crystal size. Raman spectroscopy further confirms an increase in oxygen vacancies in the doped samples. In addition, the particle morphology undergoes significant changes attributed to the influence of illumination during the deposition process.