Multijunction Solar Cells Lattice Matched to InP Using Sb-Containing Alloys

A multijunction (MJ) solar cell grown on an InP substrate using materials that are lattice-matched to InP. In an exemplary three-junction embodiment, the top cell is formed from In1-xAlxAs1-ySby (with x and y adjusted so as to achieve lattice-matching with InP, hereafter referred to as InAlAsSb), th...

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Hauptverfasser:	GONZALEZ MARIA, VURGAFTMAN IGOR, TISCHLER JOSEPH G, WALTERS ROBERT J, EKINS-DAUKES NICHOLAS, JENKINS PHILLIP, CHAN NGAI, CRESS CORY, STAVRINOU PAUL, ADAMS JESSICA, MEYER JERRY R, LUMB MATTHEW P, YAKES MICHAEL K, ABELL JOSHUA
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS CALCULATING COMPUTING COUNTING ELECTRIC DIGITAL DATA PROCESSING ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR ELECTRICITY PHYSICS SEMICONDUCTOR DEVICES
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Beschreibung
Zusammenfassung:	A multijunction (MJ) solar cell grown on an InP substrate using materials that are lattice-matched to InP. In an exemplary three-junction embodiment, the top cell is formed from In1-xAlxAs1-ySby (with x and y adjusted so as to achieve lattice-matching with InP, hereafter referred to as InAlAsSb), the middle cell from In1-a-bGaaAlbAs (with a and b adjusted so as to achieve lattice-matching with InP, hereafter referred to as InGaAlAs), and the bottom cell also from InGaAlAs, but with a much lower Al composition, which in some embodiments can be zero so that the material is InGaAs. Tunnel junctions (TJs) connect the junctions and allow photo-generated current to flow. In an exemplary embodiment, an InAlAsSb TJ connects the first and second junctions, while an InGaAlAs TJ connects the second and third junctions.