Solar selective properties of copper-aluminium composite films

    Research output: Contribution to journalArticle

    5 Citations (Scopus)

    Abstract

    Composite films of copper and aluminium were deposited by reactive direct current co-sputtering of copper and aluminium. The number of copper pieces was varied during deposition which made it possible to vary the composition of the films. In order to understand the optical behaviour of the coatings, the optical constants were determined by fitting model dielectric functions to the transmittance and the near normal reflectance spectra in the wavelength range 300-2500 nm. The thicknesses of the layers obtained by modeling were confirmed by surface profilometry. The XPS studies of the samples reveal that the number of copper pieces used during co-sputtering control the formation of copper oxide. Computer simulations on layers of Cu-Al composites on metallic substrate with anti-reflection coatings were carried out to optimize solar absorptance using the optical data from the model. Solar absorptance as high as 0.91 with anti-reflectance coating was obtained from the simulation.

    Original languageEnglish
    Pages (from-to)613-617
    Number of pages5
    JournalIndian Journal of Pure and Applied Physics
    Volume45
    Issue number7
    Publication statusPublished - Jul 2007

    Fingerprint

    aluminum
    copper
    absorptance
    composite materials
    sputtering
    reflectance
    coatings
    antireflection coatings
    copper oxides
    transmittance
    computerized simulation
    direct current
    wavelengths
    simulation

    All Science Journal Classification (ASJC) codes

    • Physics and Astronomy(all)

    Cite this

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    title = "Solar selective properties of copper-aluminium composite films",
    abstract = "Composite films of copper and aluminium were deposited by reactive direct current co-sputtering of copper and aluminium. The number of copper pieces was varied during deposition which made it possible to vary the composition of the films. In order to understand the optical behaviour of the coatings, the optical constants were determined by fitting model dielectric functions to the transmittance and the near normal reflectance spectra in the wavelength range 300-2500 nm. The thicknesses of the layers obtained by modeling were confirmed by surface profilometry. The XPS studies of the samples reveal that the number of copper pieces used during co-sputtering control the formation of copper oxide. Computer simulations on layers of Cu-Al composites on metallic substrate with anti-reflection coatings were carried out to optimize solar absorptance using the optical data from the model. Solar absorptance as high as 0.91 with anti-reflectance coating was obtained from the simulation.",
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    Solar selective properties of copper-aluminium composite films. / Sathiaraj, T. S.

    In: Indian Journal of Pure and Applied Physics, Vol. 45, No. 7, 07.2007, p. 613-617.

    Research output: Contribution to journalArticle

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