Effect of nanostructured architecture on the enhanced optical absorption in silicon thin-film solar cells

Y. C. Yao, M. T. Tsai, P. W. Lu, Chien-Jang Wu, Ya-Ju Lee

    Research output: Contribution to journalArticle

    6 Citations (Scopus)

    Abstract

    We apply the finite-difference time-domain method to numerically calculate the enhanced optical absorption of three nanostructures (i.e. nanorod, nanocone, and nanolens arrays) that were decorated on the surface of 2 μm thick crystal silicon (Si) thin-films. Compared with the nanorod and nanocone arrays, the nanolens array exhibits the highest power conversion efficiency. This result is mainly attributed to the natural capability of the nanolens array to optically couple incident light into in-plane guided modes, which increases the optical path of the incident photons in the long-wavelength regime. The power conversion efficiencies of the optimized nanorod, nanocone, and nanolens arrays are η = 17.4, 18.8, and 22.0%, respectively. These efficiencies correspond to enhancements of 26.1, 36.2, and 59.4% for the nanorod, nanocone, and nanolens arrays, respectively, compared with a planar Si thin-film with a standard quarter-wavelength antireflection layer. These findings show promises for the nanostructured design of Si thin-film solar cells that exhibit enhanced optical absorption.

    Original languageEnglish
    Pages (from-to)1798-1807
    Number of pages10
    JournalJournal of Electromagnetic Waves and Applications
    Volume26
    Issue number13
    DOIs
    Publication statusPublished - 2012 Dec 1

    Fingerprint

    Silicon solar cells
    Nanorods
    Light absorption
    optical absorption
    solar cells
    nanorods
    silicon
    Silicon
    thin films
    Conversion efficiency
    Thin films
    Wavelength
    Finite difference time domain method
    Nanostructures
    Photons
    optical paths
    finite difference time domain method
    wavelengths
    Crystals
    Thin film solar cells

    ASJC Scopus subject areas

    • Electrical and Electronic Engineering
    • Electronic, Optical and Magnetic Materials
    • Physics and Astronomy(all)

    Cite this

    Effect of nanostructured architecture on the enhanced optical absorption in silicon thin-film solar cells. / Yao, Y. C.; Tsai, M. T.; Lu, P. W.; Wu, Chien-Jang; Lee, Ya-Ju.

    In: Journal of Electromagnetic Waves and Applications, Vol. 26, No. 13, 01.12.2012, p. 1798-1807.

    Research output: Contribution to journalArticle

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