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.
Type:
Grant
Filed:
October 2, 2013
Date of Patent:
June 27, 2017
Assignee:
SolAreo Technologies Corp.
Inventors:
Benjamin Cho, Yong Lin, Pravin Patel, Mark A. Stan, Arthur Cornfeld, Daniel McGlynn, Fred Newman