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SPECTRAL SPLITTING FOR MULTI-BANDGAP PHOTOVOLTAIC ENERGY CONVERSION

United States Patent Application

20110284054
A1
View the Complete Application at the US Patent & Trademark Office
National Renewable Energy Laboratory - Visit the NREL Technology Transfer Website
A spectrum-splitting photovoltaic converter system (10) includes a high energy cell (20) and a low energy cell (30) positioned in adjacent, non-coplanar relation to each other, wherein the high energy cell (20) is the spectral splitting optical component and utilizes a combination of a dual purpose optical coating (40) comprising an anti-reflection coating, a highly reflective back surface reflector (42), and a dielectric spacer (44) to maximize transmittance of high energy into the high energy cell (20) for conversion to electric energy and to maximize reflection of low energy from the high energy cell (20) to the low energy cell (30) for conversion to electrical energy.
Wanlass, Mark W. (Evergreen, CO)
ALLIANCE FOR SUSTAINABLE ENERGY, LLC (GOLDEN CO)
13/ 146,381
January 28, 2009
CONTRACTUAL ORIGIN [0001] The United States Government has rights in this invention under Contract No. DE-AC36-08GO23308 between the United States Department of Energy and the Alliance for Sustainable Energy, LLC, the manager and operator of the National Renewable Energy Laboratory.