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US 10,381,501 B2Granted
Inverted metamorphic multijunction solar cell with multiple metamorphic layers
AssigneeSolAero Technologies Corp.
InventorsYong Lin, Paul R. Sharps, Arthur Cornfeld, Pravin Patel, Mark A. Stan, Benjamin Cho
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Abstract
The disclosure describes multi-junction solar cell structures that include two or more graded interlayers.
Claims20
A multijunction solar cell comprising:
- an upper portion including at least one solar subcell;
- a first graded interlayer composed of (InxGa1-x)yAl1-yAs with a step graded changing lattice constant, wherein 0<x<1 and 0<y<1, and wherein the first graded interlayer has a band gap in a range of 1.5 eV-1.65 eV that is constant throughout its thickness;
- a middle portion including at least one solar subcell, the first graded interlayer providing a transition in lattice constant between a particular solar subcell in the upper portion and a particular solar subcell in the middle portion that is lattice mismatched to the particular solar subcell in the upper portion;
- a second graded interlayer composed of (InxGa1-x)yAl1-yAs with step graded changing lattice constant, wherein 0<x<1 and 0<y<1, and wherein the second graded interlayer has a band gap in a range of 1.1 eV±3% that is constant throughout its thickness;
- and
- a lower portion including at least one solar subcell, the second graded interlayer providing a transition in lattice constant between a specific solar subcell in the middle portion and a specific solar subcell in the lower portion that is lattice mismatched to the specific solar subcell in the middle portion.
3 more elements
Dependencies are inferred from the claim text.