The paper discusses the problems of nucleation layer and substrate specification selection for a bottom Ge cell performance. GaAs/Ge, AlGaAs/Ge and InGaP/Ge heterojuctions have been compared showing how lattice matching and dopant interdiffusion control are key aspects for improving the Ge bottom cell photovoltaic response. The influence of substrates orientation, polarity and resistivity on the electrical performances of the bottom cells are presented.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.