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Influence of substrate temperature on crystalline copper aluminium oxide thin films synthesized through chemical spray pyrolysis (CSP) technique

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Abstract

Copper aluminium oxide (CuAlO2) of well ordered crystalline films were deposited on to glass substrates with Cu/Al ratio r = 0.8 at the substrate temperatures of 250, 300, 350, 400 and 450 °C. Films which were characterized had a thickness of the order of few micrometers. Films deposited at the optimized deposition temperature (450 °C) revealed well-crystalline CuAlO2 phase with XRD peak at 2θ = 31.7° corresponds to (006) reflection. The peak positions of the core level XPS spectra, confirm the presence of delafossite CuAlO2 phase. The optical transmission of 80 % has been observed in the visible spectrum. The obtained band gap energy is 4.1 eV. From the observed results it was evidenced that the substrate temperature has strong influence on the structural and optical properties of the spray pyrolysed copper aluminium oxide films.

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Authors and Affiliations

  1. Department of Physics and Research Centre, Nesamony Memorial Christian College, Marthandam, 629 165, India

    E. Ashlyn Kirupa

  2. Department of Physics and Research Centre, Scott Christian College (Autonomous), Nagercoil, 629 003, India

    A. Moses Ezhil Raj

  3. Department of Physics, Bishop Heber College (Autonomous), Tiruchirapalli, 620 017, India

    C. Ravidhas

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  1. E. Ashlyn Kirupa
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  2. A. Moses Ezhil Raj
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  3. C. Ravidhas
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Correspondence to A. Moses Ezhil Raj.

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Kirupa, E.A., Raj, A.M.E. & Ravidhas, C. Influence of substrate temperature on crystalline copper aluminium oxide thin films synthesized through chemical spray pyrolysis (CSP) technique. J Mater Sci: Mater Electron 27, 8991–8995 (2016). https://doi.org/10.1007/s10854-016-4930-6

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  • DOI: https://doi.org/10.1007/s10854-016-4930-6

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