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    Optical characteristics of silicon nanowires grown from tin catalyst layers on silicon coated glass

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    Type
    Article
    Authors
    Ball, Jeremy
    Centeno, Anthony
    Mendis, Budhika G.
    Reehal, H. S.
    Alford, Neil
    Date
    2012-08-20
    Online Publication Date
    2012-08-20
    Print Publication Date
    2012-08-27
    Permanent link to this record
    http://hdl.handle.net/10754/599081
    
    Metadata
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    Abstract
    The optical characteristics of silicon nanowires grown on Si layers on glass have been modeled using the FDTD (Finite Difference Time Domain) technique and compared with experimental results. The wires were grown by the VLS (vapour-liquid-solid) method using Sn catalyst layers and exhibit a conical shape. The resulting measured and modeled absorption, reflectance and transmittance spectra have been investigated as a function of the thickness of the underlying Si layer and the initial catalyst layer, the latter having a strong influence on wire density. High levels of absorption (>90% in the visible wavelength range) and good agreement between the modeling and experiment have been observed when the nanowires have a relatively high density of ∼4 wires/μ m2. The experimental and modeled results diverge for samples with a lower density of wire growth. The results are discussed along with some implications for solar cell fabrication. © 2012 Optical Society of America.
    Citation
    Ball J, Centeno A, Mendis BG, Reehal HS, Alford N (2012) Optical characteristics of silicon nanowires grown from tin catalyst layers on silicon coated glass. Optics Express 20: 20266. Available: http://dx.doi.org/10.1364/OE.20.020266.
    Sponsors
    J. Ball and H. S. Reehal thank the EPSRC and PV21 SUPERGEN consortium for support of this work. A Centeno and N Alford acknowledge the partial funding of this work by EPSRC and the King Abdullah University of Science and Technology (KAUST).
    Publisher
    The Optical Society
    Journal
    Optics Express
    DOI
    10.1364/OE.20.020266
    PubMed ID
    23037078
    ae974a485f413a2113503eed53cd6c53
    10.1364/OE.20.020266
    Scopus Count
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