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Effect of applied potential on the optical and electrical properties of Cu2CoO3

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Abstract

The effect of the applied potential on the crystallography, morphology, optical, and electrical properties of copper–cobalt oxide (Cu2CoO3) co-electrodeposited on ITO (Indium Tin Oxide) substrate has been studied. The electrochemical behavior of Cu2CoO3 using cyclic voltammetry showed that the co-electrodeposition of Cu2CoO3 occurred at a negative potential of − 0.70 V versus SCE, following a quasi-reversible reaction controlled by the diffusion process. Chronoamperometry (CA) revealed that the nucleation and growth mechanism of Cu2CoO3 follows the instantaneous three-dimensional process according to Scharifker and Hill model. X-ray diffraction (XRD) analysis indicated that the resulting layers at different applied potentials exhibited an orthorhombic structure with a preferred orientation of the crystallites (011) plan. The morphology of the surface changes with potential applied. Furthermore, the optical properties of the copper and cobalt oxide films were investigated using UV-visible spectroscopy; showing that the band gap energy for all the materials increases when the applied potential decreases. The Cu2CoO3 layers obtained are p-type semiconductors. The acceptor density (NA) increases with decreasing applied potential.

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The data sets used and/or analyzed during this study are available from the corresponding author upon reasonable request.

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Contributions

Jihane Bahar: conceptualization, investigation, and writing—original draft. Youssef Lghazi: supervision, validation, and writing—review and editing. Boubaker Youbi: supervision, validation, and writing—review and editing. Mohammed Ait Himi: data curation, formal analysis, and writing—review and editing. Chaimaa El Haimer: data curation, formal analysis, and writing—review and editing. Aziz Aynaou: methodology, visualization, and writing—review and editing. Ahmed Sahlaoui: methodology, visualization, and writing—review and editing. Itto Bimaghra: supervision, validation, and writing—review and editing.

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Correspondence to Jihane Bahar.

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Bahar, J., Lghazi, Y., Youbi, B. et al. Effect of applied potential on the optical and electrical properties of Cu2CoO3. Environ Sci Pollut Res (2023). https://doi.org/10.1007/s11356-023-27103-0

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  • DOI: https://doi.org/10.1007/s11356-023-27103-0

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