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21 February 2011 Up-conversion luminescence enhancement in erbium-doped porous silicon photonic crystals for photovoltaics
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Abstract
Solar cell efficiency can be increased by adding a rear layer that captures unabsorbed low-energy photons and combines their energy to emit higher-energy photons. This concept has been demonstrated for silicon solar cells using erbium-doped phosphors. Here we investigate the possibility of enhancing intra-4f up-conversion processes within band-edge slow light modes in photonic crystals. We discuss the potential efficiency enhancement realizable one-dimensional erbium-doped porous silicon photonic crystals and present preliminary investigations into these interactions in a real structure.
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Craig M. Johnson, Peter J. Reece, and Gavin J. Conibeer "Up-conversion luminescence enhancement in erbium-doped porous silicon photonic crystals for photovoltaics", Proc. SPIE 7933, Physics and Simulation of Optoelectronic Devices XIX, 79330I (21 February 2011); https://doi.org/10.1117/12.872115
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