Stacked monolithic multi-junction solar cell

US11527668B2 · kind B2 · utility

Assignee

• Azur Space Solar Power GmbH · DE

Inventors

• Alexander Berg · Mannheim, DE
• Matthias Meusel · Heilbronn, DE

Key dates

• Filing date: Sep 7, 2021
• Grant date: Dec 13, 2022
• Expiry date: Sep 7, 2041

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E10/544

Abstract

A stacked monolithic multi-junction solar cell having at least four subcells, wherein the band gap increases starting from the first subcell in the direction of the fourth subcell, each subcell has an n-doped emitter and a p-doped base, the emitter and the base of the first subcell each are formed of germanium, all following subcells each have at least one element of main group III and V of the periodic table, all subcells following the first subcell are formed lattice-matched to one another, a semiconductor mirror having a plurality of doped semiconductor layers with alternately different refractive indices is placed between the first and second subcell, the semiconductor layers of the semiconductor mirror are each formed n-doped and each have a dopant concentration of at most 5·1018 cm−3, the semiconductor mirror is placed between the first subcell and the first tunnel diode.