Optimization and comparison between the efficiency of ingap and gaas single solar cells with and without a window layer

Abstract

In this paper a numerical optimization and simulation are carried out using a Tcad Silvaco to extract the I-V characteristics of the single solar cells InGaP and GaAs and to predict the effect of the window layer on the performance of the solar cells. First, the InGaP and GaAs solar cells are simulated without a window layer, we have obtained an efficiency (ɳ=15.95) and (ɳ=11.24) respectively. In a second step, both InGaP and GaAs cells are simulated by introducing the window layer (In(0.39) Al(0.61) As(0.16) P(0.84) for InGaP cell) and (In(0.5) Ga(0.5) P for GaAs cell. We noticed an improvement in the characteristics I-V of each cell: fill factor (FF = 91.21%) and (ɳ =21.43%) for InGaP cell and (FF = 88.03%) and (ɳ =25.27%) for GaAs cell. The results were obtained under AM1.5 illumination and 300°K.