Radiation Hardness and Self‐Healing of Perovskite Solar Cells

The radiation hardness of CH₃ NH₃ PbI₃ -based solar cells is evaluated from in situ measurements during high-energy proton irradiation. These organic-inorganic perovskites exhibit radiation hardness and withstand proton doses that exceed the damage threshold of crystalline silicon by almost 3 orders of magnitude. Moreover, after termination of the proton irradiation, a self-healing process of the solar cells commences.