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Title:
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Mode coupling by plasmonic surface scatterers in thin-film silicon solar cells
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Author(s):
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Lare, M. van; Lenzmann, F.O.; Verschuuren, M.A.; Polman, A.
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Published by:
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Publication date:
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ECN
Solar Energy
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27-11-2012
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ECN report number:
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Document type:
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ECN-W--12-056
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Article (scientific)
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Number of pages:
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5
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Published in: Applied Physics Letters (American Institute of Physics), , 2012, Vol.101, p.-.
Abstract:
We demonstrate effective mode coupling by light scattering from periodic Ag nanoparticle arrays
printed onto a completed thin-film a-Si:H solar cell. Current-voltage measurements show a
photocurrent enhancement of 10% compared to a flat reference cell with a standard antireflection
coating. External quantum efficiency measurements for the nanopatterned cells show clear infrared
photocurrent enhancement peaks, corresponding to coupling to discrete waveguide modes in the
a-Si:H layer. The data are in good agreement with three-dimensional finite element simulations,
which are used to further optimize the design. We show that broadband photocurrent enhancement
can be obtained over the 450–750 nm spectral range.
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