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Appl. Phys. Lett. 91, 061116 (2007); doi:10.1063/1.2768882 (3 pages)

Thin-film silicon solar cells with efficient periodic light trapping texture

Christian Haase and Helmut Stiebig

Institute of Photovoltaics, Forschungszentrum Juelich, D-52425 Juelich, Germany

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(Received 11 May 2007; accepted 16 July 2007; published online 8 August 2007)

For solar cells based on thin-film microcrystalline (μc-Si:H) or amorphous silicon (a-Si:H) with absorber layers in the micrometer range, highly effective light trapping and an optimal incoupling of the entire sun spectrum are essential. To investigate and optimize both effects the wave propagation in thin-film silicon solar cells is modeled in three dimensions (3D) solving the Maxwell equations rigorously. A periodic nanostructured texture is investigated as an alternative to the common randomly rough texture. Inverted 3D pyramids with a periodicity of 850 nm and structure height of 400 nm show promising high quantum efficiencies close to the Tiedje limit.

© 2007 American Institute of Physics

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0003-6951 (print)  
1077-3118 (online)

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