Integrated Solar Collectors Using Epitaxial Lift Off and Cold Weld Bonded Semiconductor Solar Cells

A photovoltaic device comprising:

• a substrate comprising a reflective surface;
• and
• a solar cell comprising an active photovoltaic region;
• wherein the substrate is shaped as a cylindrical compound parabolic concentrator to concentrate the incident light onto the active photovoltaic region of the solar cell, and
• wherein the solar cell is shaped as a strip, the strip being disposed along a center of the cylindrical compound parabolic concentrator.

A photovoltaic device comprising:

• a substrate comprising a reflective surface;
• and
• a solar cell comprising a metal contact and an active photovoltaic region bonded to the metal contact;
• wherein:
• the metal contact of the solar cell is bonded to the reflective surface of the substrate, and
• the substrate is shaped as a compound parabolic concentrator to concentrate the incident light onto the active photovoltaic region of the solar cell.