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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
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%.
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- Copyright © Materials Research Society 2007