Absorption enhancement in amorphous silicon photonic crystals for thin film photovoltaic solar cells

Details Absorption enhancement in amorphous silicon photonic crystals for thin film photovoltaic solar cells Absorption enhancement in amorphous silicon photonic crystals for thin film photovoltaic solar cells

2009-05-13

arxiv.org/abs/0905.2204v1

Physics

Condensed Matter

Materials Science

4 pages, 5 figures

Scientific paper

We report on very high enhancement of thin layer's absorption through band-engineering of a photonic crystal structure. We realized amorphous silicon (aSi) photonic crystals, where slow light modes improve absorption efficiency. We show through simulation that an increase of the absorption by a factor of 1.5 is expected for a film of aSi. The proposal is then validated by an experimental demonstration, showing an important increase of the absorption of a layer of aSi over a spectral range of 0.32-0.76 microns.

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