 perovskite solar cells have seen rapid advancements in recent years, reaching efficiencies comparable to those of traditional inorganic thin film technologies. However, their stability remains a major issue, as they are susceptible to degradation from humidity, heat, and other environmental factors. Two approaches to improving the stability of these devices are developing protective layers around the vulnerable perovskite absorber or creating a more resilient perovskite absorber. Recent research suggests that a combination of both approaches may be necessary for achieving long-term stability on par with that of inorganic thin film technologies. This article is authored by Severin and Habisritinger, David P. McMeekin, Henry J. Snaith, and others.