Ion Migration‐Induced Amorphization and Phase Segregation as a Degradation Mechanism in Planar Perovskite Solar Cells
The operation of halide perovskite optoelectronic devices, including solar
cells and LEDs, is strongly influenced by the mobility of ions comprising the
crystal structure. This peculiarity is particularly true when considering the
long-term stability of devices. A detailed understanding of the ion migrationdriven
degradation pathways is critical to design effective stabilization
strategies. Nonetheless, despite substantial research in this first decade
of perovskite photovoltaics, the long-term effects of ion migration remain