Contact Layout and String Interconnection of Inverted Metamorphic Multijunction Solar Cells
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United States of America Patent
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Issued Date -
Sep 16, 2010
app pub date -
Jan 29, 2009
filing date -
Jan 29, 2009
priority date (Note) -
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Abstract
A multijunction solar cell including an upper first solar subcell having a first band gap disposed adjacent the top surface of the multijunction solar cell; a middle second solar subcell adjacent to the first solar subcell and having a second band gap smaller than the first band gap; a graded interlayer adjacent to the second solar subcell; the graded interlayer having a third band gap greater than the second band gap; and a lower solar subcell adjacent to the interlayer, the lower subcell having a fourth band gap smaller than the second band gap such that the third subcell is lattice mismatched with respect to the second subcell; a metal contact layer adjacent to the lower solar subcell for making an electrical contact thereto; and a cut-out extending from a peripheral edge along the top surface of the solar cell to the metal contact layer to allow an electrical contact to be made to the lower subcell from the top surface of the solar cell.
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