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Silver nanodiscs for light scattering in thin epitaxial silicon solar cells: influence of the disc radius

  • O. El Daif (a1), L. Tong (a2), B. Figeys (a1), S. Jain (a1), V. D. Miljkovic (a2), V. Depauw (a1), D. Vercruysse (a1), K. Van Nieuwenhuysen (a1), A. Dmitriev (a2), P. Van Dorpe (a1), I. Gordon (a1) and F. Dross (a1)...

Abstract

The effect of silver nanoparticles showing localised plasmonic resonances on the efficiency of thin film silicon solar cells is studied. Silver (Ag) nanodiscs were deposited on the surface of silicon cells grown on highly doped silicon substrates, through hole-mask colloidal lithography, which is a low-cost and bottom-up technique. The cells have no back reflector in order to exclusively study the effect of the front surface on their properties. Cells with nanoparticles were compared with both bare silicon cells and cells with an antireflection coating. We optically observe a resonance showing an absorption increase controllable by the disc radius. We also see an increase in efficiency with respect to bare cells, but we see a decrease in efficiency with respect to cells with an antireflection coating due to losses at wavelengths below the plasmon resonance. As the material properties are not notably affected by the particles deposition, the loss mechanism is an important absorption in the nanoparticles. We confirm this by numerical simulations.

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now at Institute of Physics, Chinese Academy of Sciences, Beijing, China

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Keywords

Silver nanodiscs for light scattering in thin epitaxial silicon solar cells: influence of the disc radius

  • O. El Daif (a1), L. Tong (a2), B. Figeys (a1), S. Jain (a1), V. D. Miljkovic (a2), V. Depauw (a1), D. Vercruysse (a1), K. Van Nieuwenhuysen (a1), A. Dmitriev (a2), P. Van Dorpe (a1), I. Gordon (a1) and F. Dross (a1)...

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