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Opt Express. 2010 Sep 13;18 Suppl 3:A293-9. doi: 10.1364/OE.18.00A293.

Absorbing one-dimensional planar photonic crystal for amorphous silicon solar cell.

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  • 1Universit√© de Lyon, Institut des Nanotechnologies de Lyon INL-UMR, CNRS, Ecole Centrale de Lyon, Ecully, France.


We report on the absorption of a 100nm thick hydrogenated amorphous silicon layer patterned as a planar photonic crystal (PPC), using laser holography and reactive ion etching. Compared to an unpatterned layer, electromagnetic simulation and optical measurements both show a 50% increase of the absorption over the 0.38-0.75micron spectral range, in the case of a one-dimensional PPC. Such absorbing photonic crystals, combined with transparent and conductive layers, may be at the basis of new photovoltaic solar cells.

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