SOLAR ENERGY CONCENTRATOR WITH MULTIPLEXED DIFFRACTION GRATINGS
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United States of America Patent
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Issued Date -
Dec 5, 2013
app pub date -
May 1, 2013
filing date -
May 1, 2012
priority date (Note) -
Abandoned
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Abstract
A solar-energy concentrator and method for collecting sunlight with the concentrator. The concentrator includes a photovoltaic (PV) module having a PV cell and layers containing holographically-defined diffraction gratings that are spatially stacked or multiplexed. Spatial stacking or multiplexing of the gratings is configured to ensure that one grating layer carries another grating layer and that a portion of incident light not diffracted on one grating interacts with and is diffracted by another grating. Light that has interacted with either of the spatially multiplexed gratings is further redirected towards a sunlight collecting surface of the PV cell with the use of TIR reflection at a dielectric boundary of the concentrator.
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