Multijunction solar cell with rear-side germanium subcell and the use thereof

Abstract

Multijunction solar cells are provided having at least four p-n junctions with a rear-side germanium subcell, orientated away from the light, and at least three subcells made of III-V compound semiconductors, disposed above the germanium subcell, the multijunction solar cells having at least one metamorphic buffer layer and at least one wafer-bonded compound and all the layers, which are disposed above the germanium subcell, comprising respectively a light-absorbing emitter- and/or base layer which comprise at least 20% indium, relative to the sum of all the atoms of group III. Furthermore, methods of using of these multijunction solar cells in space are also provided.

Dependencies are inferred from the claim text.