Inverted Metamorphic Multijunction Solar Cells with Distributed Bragg Reflector
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United States of America Patent
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Issued Date -
Jun 17, 2010
app pub date -
Dec 17, 2008
filing date -
Dec 17, 2008
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Abstract
A multijunction solar cell including an upper first solar subcell having a first band gap; a middle second solar subcell adjacent to the first solar subcell and having a second band gap smaller than the first band gap, and having a base layer and an emitter layer, a graded interlayer adjacent to the second solar subcell; the graded interlayer having a third band gap greater than said second band gap; a third solar subcell adjacent to the interlayer, the third 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; and a distributed Bragg reflector (DBR) adjacent the second or third subcell.
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