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3D Photonic Crystals as Diffractive and Energy Selective Filter for Tandem Thin Film Solar Cells

Published online by Cambridge University Press:  01 February 2011

Ralf B. Wehrspohn ,
Andreas Bielawny ,
Carsten Rockstuhl  and
Falk Lederer
Ralf B. Wehrspohn
Affiliation:
[email protected], Martin-Luther-University Halle-Wittenberg, Physics, Heinrich-Damerow-Str. 4, Halle, 06120, Germany, +49 345 5589 100, +49 345 5589101
Andreas Bielawny
Affiliation:
[email protected], Martin-Luther-University Halle-Wittenberg, Physics, Heinrich-Damerow-Str. 4, Halle, 06120, Germany
Carsten Rockstuhl
Affiliation:
[email protected], University of Jena, Physics, Jena, 07743, Germany
Falk Lederer
Affiliation:
[email protected], University of Jena, Physics, Jena, 07743, Germany
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Abstract

We suggest a photonic structure with energy selective and diffractive properties to be incorporated in thin-film tandem solar cells. Our device enhances the pathway of incident light within a amorphous silicon photovoltaic (PV) top cell in its spectral region of low optical absorption. This leads to an increase in the short-circuit current of the top cell. For a conductive inverted opal structure as intermiediate layer, we numerically determine an current increase of 1.44mA/cm2 for an a-Si:H / c-Si thin-film tandem cell corresponding to an increase in the absolute efficiency from 11.1% to 12.4%.

Keywords

photovoltaicoptical propertiesnanostructure
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1014: Symposium AA – Three-Dimensional Nano- and Microphotonics , 2007 , 1014-AA05-01
Copyright
Copyright © Materials Research Society 2007

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