Nitride-based multi-junction solar cell modules and methods for making the same

A backside illuminated multi-junction solar cell module, comprising:

• a substrate comprising a material substantially transparent to solar radiation;
• a plurality of multi junction solar cells, each multi-junction solar cell comprising
• a first active cell over the substrate, the first active cell capable of absorbing a first portion of the solar radiation for conversion into electrical energy;
• and
• a second active cell over the first active cell, the second active cell capable of absorbing a second portion of the solar radiation for conversion into electrical energy,
• wherein at least one of the first and second active cells comprises a nitride;
• a dielectric layer over the plurality of multi-junction solar cells;
• and
• a cell interconnection that provides a series connection between at least a first multi-junction solar cell and a second multi-junction solar cell of the plurality of multi junction solar cells, wherein the cell interconnection comprises a first contact electrically coupling the first active cell of the first multi junction solar cell through a first opening in the dielectric layer and a second contact electrically coupling the second active cell of the second multi-junction solar cell through a second opening in the dielectric layer.