Study of some Physical Properties and the Effect of Gamma Irradiation on Optical Properties of Electrochromic Co₃O₄ Thin Film

Abstract:

Cobalt oxide thin film (Co₃O₄) has been prepared from cobalt chloride with distilled water on conducting glass substrates Fluorine doped Tin Oxide (FTO) at (400^ºC) by depositing chemical spray pyrolysis, with thickness (200 nm). The structural properties are studied by XRD. Also, optical properties and electrical properties of Co₃O₄ thin film are studied by UV spectroscopy and Cyclic voltammetry (CV) respectively. The effects of gamma irradiation on optical properties are also examined. XRD results showed that the film was polycrystalline with cubic structure having preferred orientation (111). The as-prepared Co₃O₄ film exhibits a noticeable EC behaviour with reversible colour which changes from dark grey to pale yellow with bleaching time (55 s) and colouring time (40 s). After irradiation, the optical properties showed that as the transmittance decrease leads to decrease the direct optical band gap from (3.68eV) to (3.55eV)

• Periodical: Materials Science Forum (Volume 1021)
• Pages: 107-114
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.1021.107
• Online since: February 2021
• Authors: Buthainah A. Ibrahim*, Ziad T. Khodiar, Marwan M. Farhan
• Keywords: Co₃O₄, CV, Electrochromic, Gamma Irradiation, Thin Films, UV, XRD

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