Photovoltaic Conversion Assembly with Concentrating Optics
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United States of America Patent
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Issued Date -
Nov 4, 2010
app pub date -
May 4, 2010
filing date -
May 4, 2009
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Abandoned
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Abstract
A photovoltaic conversion assembly comprises an optical slab with first and second major surfaces and an intermediate surface therebetween. Light energy to be collected impinges as incoming photons on the first major surface. At least one PV cell is mounted to receive light energy from the intermediate surface of the optical slab and convert such light energy to electrical energy. The PV cell has a highest band gap E. A down-converting structure is located on the second major surface of the slab for converting to lower energy light received through the slab, with at least about 75 percent of the converted light having an energy level above the band gap E. A two-way spectrally selective reflector, located proximate the first major surface, cooperates with the down-converting structure for preventing high angle light from undesirably exiting the optical slab via the first major surface.
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