Modeling Germanium p-n Junctions for Multi-junction Solar Cell Applications

An efficient germanium cell is a key element for attaining high efficiency in state-of-the-art triple junction solar cells. This work summarizes our efforts in the field of modeling of the quantum efficiency of germanium p/n junctions for photovoltaic applications. An analytic tool is presented and the most relevant parameters are discussed and modeled. Finally, some hints for the optimum design of germanium solar cells are deduced form the simulations.