Design and Simulation of Multi-Junction Solar Cells

Abstract

The window and back surface field (BSF) layers are two important layers in the design of multi-junction solar cells. In this study, the focus is on selecting suitable materials for the top window layer as well as the top and bottom BSF layers of an InGaP/GaAs Dual-Junction (DJ) solar cell with introducing the effect of thickness variation of these layers. Furthermore, the doping concentration of the top and bottom BSF layers is optimized. Another interest in this study is to present an optimization procedure for the design parameters of InGaP/GaAs/ InGaAs Triple-Junction (TJ) solar cell. The optimization technique is performed on InGaP/GaAs/Ge. The Ge sub-cell is then replaced by an InGaAs sub-cell and a comparison between the performance parameters of InGaP/GaAs/Ge and InGaP/GaAs/InGaAs TJ solar cells is investigated.