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Mode coupling by plasmonic surface scatterers in thin-film silicon solar cells

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4 Author(s)
van Lare, M. ; Center for Nanophotonics, FOM Institute AMOLF, Science Park 104, Amsterdam 1098 XG, The Netherlands ; Lenzmann, F. ; Verschuuren, M.A. ; Polman, A.

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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.

Published in:

Applied Physics Letters  (Volume:101 ,  Issue: 22 )

Date of Publication:

Nov 2012

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