Inverted metamorphic multijunction solar cells

US8536446B2 · kind B2 · utility

Assignee

• Emcore Solar Power, Inc. · US

Inventors

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

Key dates

• Filing date: Apr 12, 2010
• Grant date: Sep 17, 2013
• Expiry date: Feb 7, 2031

Classification

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

Abstract

Multijunction solar cells that may include a first solar subcell with a first band gap, and a second solar subcell disposed over the first solar subcell and having a second band gap smaller than said first band gap. The solar cells may also include a grading interlayer disposed over the second solar subcell that may include a third band gap greater than the second band gap. The grading interlayer may not include phosphorus. The solar cells may also include a third solar subcell disposed over the interlayer that is lattice mismatched with respect to the second solar subcell. The third solar subcell may have a fourth band gap smaller than the third band gap.