Descripción
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The development of a novel optical design for the high concentration photovoltaics (HPCV) nonimaging concentrator (>500x) that utilizes a built-in spectrum splitting concept is presented. The primary optical element (POE) is a flat Fresnel lens and the secondary optical element (SOE) is a free-form RXI-type concentrator with a band-pass filter embedded in it. The POE and SOE perform Köhler integration to produce light homogenization on the receiver. The system uses a combination of a commercial concentration GaInP/GaInAs/Ge 3J cell and a concentration Back-Point-Contact (BPC) silicon cell for efficient spectral utilization, and an external confinement technique for recovering the 3J cell?s reflection. A design target of an ?equivalent? cell efficiency ~46% is predicted using commercial 39% 3J and 26% Si cells. A projected CPV module efficiency of greater than 38% is achievable at a concentration level greater than 500X with a wide acceptance angle of ±1º. A first proof-of concept receiver prototype has been manufactured using a simpler optical architecture (with a lower concentration, ~100x and lower simulated added efficiency), and experimental measurements have shown up to 39.8% 4J receiver efficiency using a 3J cell with a peak efficiency of 36.9% | |
Internacional
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Si |
Nombre congreso
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Optical Design and Engineering IV |
Tipo de participación
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960 |
Lugar del congreso
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Marsella, Francia |
Revisores
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Si |
ISBN o ISSN
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978-0-8194-8793-3 |
DOI
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Fecha inicio congreso
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21/09/2011 |
Fecha fin congreso
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21/09/2011 |
Desde la página
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1 |
Hasta la página
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9 |
Título de las actas
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Freeform Fresnel RXI-RR Köhler design with spectrum-splitting for photovoltaics |