The model of performance change of GaInP/GaAs/Ge triple-junction solar cells in pico-satellite

In this paper, we propose a method for modeling and analyzing the performance degradation of GaInP/GaAs/Ge solar cells which work in complex and changing space environment. By analyzing the on-track monitoring data, we select the output power as a key parameter for solar cell performance changes. According to the observation data of the power, the performance of the solar cell was analyzed by the time point of the failure of the lithium battery as the dividing point, and the degradation of the solar cell before and after the dividing point was calculated. The rationality of the model is verified and the predicted value is calculated. It is found that it is basically the same as the actual value, the accuracy are 3.3%, 0.71% respectively. These results show that the performance degradation model made in this paper is effective for the performance analysis of GaInP/GaAs/Ge solar cells.