The higher efficiencies and radiation resistance of III-V cells have made them attractive as replacements for silicon cells on many satellites and space vehicles. Over the years, III-V multijunction cells have largely replaced silicon cells on new satellite launches. The GaInP/GaAs/Ge cells are integrated into modules very much like single-junction solar cells, and have the added advantage of operating at high voltage and low current, as well as having excellent radiation resistance. They also have a smaller temperature coefficient than silicon cells, which implies better performance under the operating conditions encountered in space applications.
Space applications of GaInP/GaAs/Ge and other III-V solar cells are discussed in detail in Chapter 9.