Direct electrical contact of slanted ito film on axial p-n junction silicon nanowire solar cells

Ya-Ju Lee, Yung Chi Yao, Chia Hao Yang

    Research output: Contribution to journalArticle

    12 Citations (Scopus)

    Abstract

    A novel scheme of direct electrical contact on vertically aligned silicon nanowire (SiNW) axial p-n junction is demonstrated by means of oblique-angle deposition of slanted indium-tin-oxide (ITO) film for photovoltaic applications. The slanted ITO film exhibits an acceptable resistivity of 1.07x10.3-cm underwent RTA treatment of T = 450C, and the doping concentration and carrier mobility by Hall measurement amount to 3.7x1020cm.3 and 15.8cm2/V-s, respectively, with an n-type doping polarity. Because of the shadowing effect provided by the SiNWs, the incident ITO vapor-flow is deposited preferentially on the top of SiNWs, which coalesces and eventually forms a nearly continuous film for the subsequent fabrication of grid electrode. Under AM 1.5G normal illumination, our axial p-n junction SiNW solar cell exhibits an open circuit voltage of VOC = 0.56V, and a short circuit current of JSC = 1.54 mA/cm2 with a fill factor of FF = 30%, resulting in a total power conversion efficiency of PEC = 0.26%.

    Original languageEnglish
    Pages (from-to)A7-A14
    JournalOptics Express
    Volume21
    Issue number101
    DOIs
    Publication statusPublished - 2013 Jan 14

    Fingerprint

    p-n junctions
    indium oxides
    tin oxides
    electric contacts
    nanowires
    solar cells
    oxide films
    silicon
    volatile organic compounds
    short circuit currents
    carrier mobility
    open circuit voltage
    polarity
    illumination
    grids
    vapors
    fabrication
    electrical resistivity
    electrodes

    ASJC Scopus subject areas

    • Atomic and Molecular Physics, and Optics

    Cite this

    Direct electrical contact of slanted ito film on axial p-n junction silicon nanowire solar cells. / Lee, Ya-Ju; Yao, Yung Chi; Yang, Chia Hao.

    In: Optics Express, Vol. 21, No. 101, 14.01.2013, p. A7-A14.

    Research output: Contribution to journalArticle

    Lee, Ya-Ju ; Yao, Yung Chi ; Yang, Chia Hao. / Direct electrical contact of slanted ito film on axial p-n junction silicon nanowire solar cells. In: Optics Express. 2013 ; Vol. 21, No. 101. pp. A7-A14.
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