Photo-degradation of perovskite solar cells: Modeling and Simulation

Photon-induced degradation is a well-known challenge for perovskite solar cells. In this report, we have developed a complete physical model on understanding the degradation with the help of a modified equivalent circuit model. We have done photo-degradation on p-i-n structured device in open-circuit condition at one-sun intensity and showed that the experimental result matches well with the simulation result based on our model. We have used the theory based on migration and generation of ions during photo-exposure to explain our results. We also have studied influence of Perovskite-HTL interface on photon-induced degradation of perovskite solar cells.