A photovoltaic solar concentrator is disclosed with one or more
transverse-junction solar cells (also termed point contact solar cells)
and a lens located above each solar cell to concentrate sunlight onto the
solar cell to generate electricity. Piezoelectric actuators tilt or
translate each lens to track the sun using a feedback-control circuit
which senses the electricity generated by one or more of the solar cells.
The piezoelectric actuators can be coupled through a
displacement-multiplier linkage to provide an increased range of movement
of each lens. Each lens in the solar concentrator can be supported on a
frame (also termed a tilt plate) having three legs, with the movement of
the legs being controlled by the piezoelectric actuators.
November 30, 2010
438/98 ; 257/E27.125;
H01L 21/00 (20060101);
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.