Hysteresis Modeling of Perovskite Solar Cells by an Equivalent Circuit Model

A comprehensive equivalent circuit model is developed to investigate the surface recombination, bulk recombination, shunt resistance, series resistance and the abnormal hysteresis effect for perovskite solar cells. By comparing the introduced model and the ionic drift-diffusion model, two typical capacitance expressions are summarized to characterize the hysteresis. The proposed equivalent circuit model together with typical capacitance expressions reveals the hidden device physics of solar cells, being a valuable synthesis tool for device simulation and analysis.