Electric transport in 3D photonic crystal intermediate reflectors for micromorph thin-film tandem solar cells

J. Üpping; A. Bielawny; S. Lee; M. Knez; R. Carius; R. B. Wehrspohn

doi:10.1117/12.824688

20 August 2009 Electric transport in 3D photonic crystal intermediate reflectors for micromorph thin-film tandem solar cells

J. Üpping, A. Bielawny, S. Lee, M. Knez, R. Carius, R. B. Wehrspohn

Author Affiliations +

Proceedings Volume 7409, Thin Film Solar Technology; 74090J (2009) https://doi.org/10.1117/12.824688
Event: SPIE Solar Energy + Technology, 2009, San Diego, California, United States

Abstract

The progress of 3D photonic intermediate reflectors for micromorph silicon tandem cells towards a first prototype cell is presented. Intermediate reflectors enhance the absorption of spectrally-selected light in the top cell and decrease the current mismatch between both junctions. A numerical method to predict filter properties for optimal current matching is presented. Our device is an inverted opal structure made of ZnO and fabricated using self-organized nanoparticles and atomic layer deposition for conformal coating. In particular, the influence of ZnO-doping and replicated cracks during drying of the opal is discussed with respect to conductivity and optical properties. A first prototype is compared to a state-of-the-art reference cell.

Citation Download Citation

J. Üpping, A. Bielawny, S. Lee, M. Knez, R. Carius, and R. B. Wehrspohn "Electric transport in 3D photonic crystal intermediate reflectors for micromorph thin-film tandem solar cells", Proc. SPIE 7409, Thin Film Solar Technology, 74090J (20 August 2009); https://doi.org/10.1117/12.824688

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