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arXiv · 0905.2204

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

Ounsi El Daif·Emmanuel Drouard·Yeonsang Park·Alain Fave·Anne Kaminski·Mustapha Lemiti·Xavier Letartre·Pierre Viktorovitch·Sungmo Ahn·Heonsu Jeon·Christian Seassal
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Abstract

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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Ounsi El Daif, Emmanuel Drouard, Yeonsang Park, Alain Fave, Anne Kaminski, Mustapha Lemiti, Xavier Letartre, Pierre Viktorovitch, Sungmo Ahn, Heonsu Jeon, Christian Seassal. 2009-05-13. Absorption enhancement in amorphous silicon photonic crystals for thin film photovoltaic solar cells. https://arxiv.org/abs/0905.2204

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