Circuit modeling and analysis of hysteresis effect of perovskite photovoltaic cells

Perovskite solar cells are an important development direction for future solar photovoltaic technology, with advantages such as low cost and high efficiency. However, they commonly suffer from hysteresis effects, which severely impacts the efficiency and lifespan of the cells. This paper analyzes the mechanism of hysteresis effects and the characteristics of the J-V curve of the cells. From a circuit perspective, this paper proposes a circuit modeling method for the J-V characteristics of hysteresis effects in perovskite photovoltaic cells. By utilizing the dynamic properties of nonlinear capacitors, the hysteresis model of perovskite photovoltaic cells is constructed, and the general expression of the model is derived. This model can simulate common hysteresis curves of different perovskite photovoltaic cells under various conditions. Simulation analysis of parameters' effects on hysteresis effects is conducted using the model. Experimental validation confirms that the circuit model accurately replicates the hysteresis effects observed in individual cells. By finely adjusting parameters, the model can efficiently generate a wide array of hysteresis effects, offering exceptional precision and versatility. This capability facilitates the precise simulation of hysteresis phenomena observed in perovskite photovoltaic cells.