12 May 2006 Collection and conversion properties of photovoltaic fluorescent collectors with photonic band stop filters
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Abstract
The thermodynamic limits of photovoltaic solar energy conversion by fluorescent collectors are examined theoretically and experimaentally. The maximum efficiency of a fluorescent collector corresponds to the Shockley-Queisser limit for a non-concentrating solar cell with a single band gap energy. To achieve this efficiency the collector requires a photonic structure at its surface that acts as an omni-directional spectral band stop filter. Such a band stop filter is also required to achieve the thermodynamic light concentration limit in a fluorescent collector. The potential of photonic structures for the efficiency enhancement of idealized and real fluorescent collectors is highlighted. Analysis of a fluorescent collector system ny spatially resolved light induced current measurements and by quantum efficiency analysis shows that the collection efficiency of a real fluorescent collector system increases by up to 30% with the help of a Bragg stack on top of the collector acting as a band stop filter.
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Gerda C. Glaeser, Uwe Rau, "Collection and conversion properties of photovoltaic fluorescent collectors with photonic band stop filters", Proc. SPIE 6197, Photonics for Solar Energy Systems, 61970L (12 May 2006); doi: 10.1117/12.669638; https://doi.org/10.1117/12.669638
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