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Study of the structural, optical, electrical and electrochemical properties of copper oxide thin films synthesized by spray pyrolysis

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Abstract

In our present study we focus on characterizing copper oxide (CuO) thin films synthesized at various substrate temperatures and to assess the electrochemical performance of the optimized sample. The spray pyrolysis method was used to fabricate CuO thin film samples, with the substrate temperatures ranging from 250 to 400 °C. The coatings underwent characterization through different analytical techniques, including X-ray diffraction, energy-dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, field emission scanning electron microscopy, Raman spectroscopy, and Hall effect measurements. All the thin film samples were confirmed to have a monoclinic phase. The presence of Cu=O was confirmed by Raman spectroscopy. All the samples exhibited P type conductivity except the one synthesized at 400 °C. Galvanostatic charge–discharge studies revealed a pseudocapacitive nature for the optimized sample synthesized at 350 °C. The symmetrical charging and discharging curves imply excellent material reversibility, indicating long-term cyclic stability. The Nyquist plot exhibited a semicircle at high frequencies, representing the material’s intrinsic resistance and a linear behavior at low frequencies, depicting the ion transfer resistance. The electrode demonstrated favorable electrochemical properties and potential use of the material in supercapacitor applications.

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Data availability

Data sets generated during the current study are available from the corresponding author on reasonable request.

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Funding

E I Anila has received research support from CHRIST (Deemed to be University), Bangalore under seed money scheme (SMSS-2218).

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Authors and Affiliations

  1. Optoelectronic and Nanomaterials’ Research Laboratory, Department of Physics, Union Christian College, Aluva, Kerala, 683102, India

    Ben Jos & E. I. Anila

  2. Sree Sankara College, Kalady, Kerala, 683574, India

    Ben Jos

  3. Department of Physics and Electronics, CHRIST (Deemed to be University), Bangalore, Karnataka, 560029, India

    Chrisma Rose Babu & E. I. Anila

  4. Facultad de Ingeniería Mecánica y Eléctrica (FIME), Universidad Autónoma de Nuevo León (UANL), Av. Universidad, Cd. Universitaria, 66455, San Nicolás de los Garza, Nuevo Leon, Mexico

    S. Shaji

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  1. Ben Jos
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Contributions

BJ: Conceptualization, Methodology, Investigation, Writing-original draft. CRB: Investigation, Analysis. SS: Data curation. EIA: Project administration, Supervision, Writing-review and editing.

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Correspondence to E. I. Anila.

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Jos, B., Babu, C.R., Shaji, S. et al. Study of the structural, optical, electrical and electrochemical properties of copper oxide thin films synthesized by spray pyrolysis. J Mater Sci: Mater Electron 35, 233 (2024). https://doi.org/10.1007/s10854-024-12006-8

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