J–V Hysteresis Behavior Circuit Modeling and Power Improvement Solutions With MPPT in Perovskite Photovoltaic Cells

ABSTRACT Perovskite solar cells (PSCs) are a new significant emerging solar photovoltaic source and have the advantages of low cost and high efficiency. However, hysteresis is common in PSCs and can significantly impact power generation efficiency and operational lifespan. In order to analyze the J–V hysteresis behavior with a circuit simulator, a new J–V hysteresis circuit model is firstly proposed by using the dynamic characteristics of dynamic capacitance to simulate the hysteresis behaviors in this paper. The proposed model can effectively and precisely simulate the various dynamic hysteresis behaviors for investigation. In addition, to mitigate the poor output power performance caused by hysteresis effects in PSCs in practical applications, the proposed circuit model is employed to analyze the impact of hysteresis on maximum power point tracking (MPPT). The results indicate that oscillations occur in both output voltage and current during the MPPT process. Then a dynamic boundary–based ROA (DB‐ROA) variable step‐size MPPT tracking method is introduced, which can effectively implement oscillation suppression, improve the power output, and reduce the tracking time. The simulation results and experimental data show that this method can effectively improve the performance of the output power.