Inverted metamorphic multijunction solar cells

US8536445B2 · kind B2 · utility

Assignee

• Emcore Solar Power, Inc. · US

Inventors

• Arthur Cornfeld · Sandia Park, US
• Mark A. Stan · Albuquerque, US

Key dates

• Filing date: Jun 2, 2006
• Grant date: Sep 17, 2013
• Expiry date: Sep 18, 2029

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P70/50

Abstract

A method of forming a multijunction solar cell comprising an upper subcell, a middle subcell, and a lower subcell comprising providing first substrate for the epitaxial growth of semiconductor material; forming a first solar subcell on said substrate having a first band gap; forming a second solar subcell over said first subcell having a second band gap smaller than said first band gap; and forming a grading interlayer over said second subcell having a third band gap larger than said second band gap forming a third solar subcell having a fourth band gap smaller than said second band gap such that said third subcell is lattice mismatched with respect to said second subcell.