ALEXANDRIA, Va., Dec. 23 -- United States Patent no. 12,507,487, issued on Dec. 23, was assigned to Azur Space Solar Power GmbH (Heilbronn, Germany).
"Multi-junction solar cell" was invented by Daniel Fuhrmann (Heilbronn, Germany), Gregor Keller (Heilbronn, Germany) and Rosalinda Van Leest (Heilbronn, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "A stacked multi-junction solar cell comprising a stack composed of a bottom subcell, at least one middle subcell, and a top subcell, wherein each subcell has an emitter and a base at least the top subcell is made of a III-V semiconductor material or includes a III-V semiconductor material, and the emitter of the top subcell includes a superlattice."
The pa...