Photovoltaic cell with light trapping for enhanced efficiency

United States Patent

November 17, 2015
View the Complete Patent at the US Patent & Trademark Office
Microsystems Enabled Photovoltaics (MEPV)
The efficiency of a photovoltaic cell is enhanced by light trapping using Mie-scattering nanostructures. In one embodiment, an array of nanocylinders is formed on the front surface of a silicon film to enhance forward scattering into the film, and an array of nanocylinders is formed on the back surface to enhance backscattering so that more light is absorbed within the silicon film. In an alternate embodiment, a mirror layer is formed on the back surface of the silicon film to reflect light within the film back toward the front-surface nanocylinder array.
November 26, 2014
H01L 33/00 (20100101); H01L 31/0216 (20140101); H01L 31/056 (20140101);
STATEMENT OF GOVERNMENT RIGHTS This invention was made with Government support under Contract No. DE-AC04-94AL85000 awarded by the U.S. Department of Energy. The Government has certain rights in the invention.