Photoprotection in metal halide perovskites by ionic defect formation
Nga Phung, Alessandro Mattoni, Joel A. Smith, Dieter Skroblin, Hans Köbler, Léo Choubrac, Joachim Breternitz, Jinzhao Li, Thomas Unold, Susan Schorr, Christian Gollwitzer, Ivan G. Scheblykin, Eva Unger, Michael Saliba, Simone Meloni, Antonio Abate, Aboma Merdasa
Abstract
Metal halide perovskites form defects as a response to intense light in order to protect themselves from overheating and degrading. The defects in turn alter the material properties to limit photon absorption, and thereafter, the defects gradually recover and restore the optoelectronic properties. In plants, mechanisms to reduce radiation damage serve the purpose of temporarily limiting the photon dose, and thereby photosynthesis, in order to improve photostability. Such a feature in halide perovskites is promising for their photovoltaic applications.