Patent ID: 8624103
Filing Date: 2014-01-07
Classification: H01L,Y02E,Y02P

Abstract:
1. A method comprising: forming a plurality of solar cell mesas over a substrate; providing, in each mesa, a first active cell for absorbing solar radiation for conversion into electrical energy, the providing the first active cell comprising epitaxially growing a first active cell layer over the substrate, the first active cell layer comprising a first p-n junction, the first active cell having a first bandgap energy; providing, in each mesa and over each first active cell, a second active cell for absorbing solar radiation for conversion into electrical energy, the providing the second active cell comprising epitaxially growing a second active cell layer over the first active cell layer, the second active cell layer comprising a second p-n junction, the second active cell having a second bandgap energy, the first bandgap energy being greater than the second bandgap energy; forming a dielectric layer over the plurality of solar cell mesas and the substrate, the plurality of solar cell mesas being disposed between the substrate and at least a portion of the dielectric layer; and electrically connecting the plurality of solar cell mesas, wherein at least one of the first and second active cells of each mesa comprises a nitride.