Navigating the path to stability in perovskite solar cells

Developing accurate and actionable physical models of degradation mechanisms in perovskite solar cells (PSCs) will be essential to developing bankable technologies. Princeton researchers have recently shown that the temperature-dependent degradation of all-inorganic PSCs follows the Arrhenius equation and mechanistically assigned the leading cause of degradation to iodide diffusion. With an ion-blocking two-dimensional capping layer, they achieve a projected 5 years of operating stability for PSCs based on an accelerated aging model.