Local versus global absorption in thin-film solar cells with randomly textured surfaces

Rockstuhl, C.; Bittkau, K.; Fahr, S.; Lederer, F.; Beckers, T.; Carius, R.

doi:10.1063/1.2965117

Journal Article

Local versus global absorption in thin-film solar cells with randomly textured surfaces

Rockstuhl, C. ; Fahr, S. ; Lederer, F. ; Bittkau, K.FZJ* ; Beckers, T.FZJ* ; Carius, R.FZJ*

2008
American Institute of Physics Melville, NY

Applied physics letters 93, 061105 (2008) [10.1063/1.2965117]

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Please use a persistent id in citations: http://hdl.handle.net/2128/17177 doi:10.1063/1.2965117

Abstract: Enhanced light absorption in amorphous silicon thin films deposited on randomly textured zinc-oxide surfaces is investigated by means of a rigorous diffraction theory taking into account measured surface profiles and near-field optical data. Global absorption enhancement is obtained in the calculations for particular modifications of the random texture. We furthermore spatially resolve local domains of the surface texture, which show the strongest contribution to the absorption. Criteria on how random surfaces should look like to enhance absorption in thin-film solar cells are derived. (C) 2008 American Institute of Physics.

Keyword(s): J

Classification:

Physics, Applied

Note: We acknowledge the partial financial support of this work by the Deutsche Forschungsgemeinschaft (PAK88) and the Federal Ministry of Education and Research (Nanovolt). We thank J. Hupkes for providing us with the samples for this study. Parts of computations were performed on the IBM p690 cluster JUMP of the JvN Forschungszentrum Julich, Germany and supported by a VSR project.

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