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5 May 2008 Geometry effects on photon collection in photovoltaic fluorescent collectors
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Fluorescent photovoltaic collectors are examined theoretically with the help of Monte-Carlo simulations. The classical construction of mounting solar cells on each side surface of the collector is compared to alternative set-ups: solar cells only partly cover the collector side surfaces or they are mounted on the collector back surface, respectively. We find that the collection probability of photons in most situations is higher for systems with solar cells mounted on the sides of the collector compared to systems with solar cells at the bottom. In all cases collection probabilities in excess of 90 % are only achieved if a photonic band stop filter is applied to the top surface of the collector. This filter acts as an omni-directional spectral band stop and prevents the light emitted by the dye from leaving the collector. The application of such a filter allows a solar cell area reduction of 99 %. However, inclusion of non-radiative losses in the collector deteriorates the photon collection probability in all cases. This effect is especially important in systems with band stop filter.
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Liv Prönneke and Uwe Rau "Geometry effects on photon collection in photovoltaic fluorescent collectors", Proc. SPIE 7002, Photonics for Solar Energy Systems II, 70020U (5 May 2008);

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