The present paper deals with the modeling of the simultaneous impact of temperature and applied hydrostatic pressure on the electronic characteristics and electrical parameters in In_0.2Ga_0.8N/GaN p-i-n solar cells. The energy conduction band is calculated with a self-consistent model coupled with the photovoltaic parameters taking into consideration the spontaneous and piezoelectric polarizations. A new efficient numerical model based on the difference finite method is well suited to theoretical and experimental data. The results reveal that the hydrostatic pressure has a beneficial effect on the behavior of cells on the N-face configuration, whereas the elevated temperature has a destructive impact on these devices.

In this paper, a numerical model allows to analyze the photovoltaic parameters according to the electronic properties of In_xGa_1−xN/GaN MQW solar cells under the effect of temperature, the number of quantum wells and indium composition. The numerical investigation starts from the evaluation through the finite difference (FDM) simulation of the self-consistent method coupled with the photovoltaic parameters taking into account the effects of the spontaneous and piezoelectric polarization. The results found were consistent with the literature. As expected, the temperature had a negative impact on the performance of InGaN/GaN MQW solar cells. However, increasing the number of quantum wells improves cell performance. This positive impact further improves with the increase in the indium rate. The obtained results were 28 mA/cm² for the short-circuit current density, 1.43 V for the open-circuit voltage, and the obtained conversion efficiency was 31% for a model structure based on 50-period InGaN/GaN-MQW-SC under 1-sun AM1.5G.