Inverted metamorphic multijunction solar cells with doped alpha layer

US9691928B2 · kind B2 · utility

Assignee

• SOLAERO TECHNOLOGIES CORP. · US

Inventors

• Benjamin Cho · Albuquerque, US
• Yong Lin · Albuquerque, US
• Pravin Patel · Albuquerque, US
• Mark A. Stan · Albuquerque, US
• Arthur Cornfeld · Sandia Park, US
• Daniel McGlynn · Albuquerque, US
• Fred Newman · Albuquerque, US

Key dates

• Filing date: Oct 2, 2013
• Grant date: Jun 27, 2017
• Expiry date: Dec 10, 2035

Classification

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

Abstract

A method of forming a multijunction solar cell comprising at least an upper subcell, a middle subcell, and a lower subcell, the method including forming a first alpha layer over said middle solar subcell using a surfactant and dopant including selenium, the first alpha layer configured to prevent threading dislocations from propagating; forming a metamorphic grading interlayer over and directly adjacent to said first alpha layer; forming a second alpha layer using a surfactant and dopant including selenium over and directly adjacent to said grading interlayer to prevent threading dislocations from propagating; and forming a lower solar subcell over said grading interlayer such that said lower solar subcell is lattice mismatched with respect to said middle solar subcell.