Radiation-resistance in cesium-doped perovskites: mechanisms, challenges, and future prospects

Cesium-doped mixed halide perovskites show unique potential in radiation-prone environments because their response to gamma rays is not purely destructive. At lower doses (< 10 kGy), radiation can passivate defects, improving optoelectronic properties, with irreversible damage like halide segregation only dominating at very high doses (> 21 kGy). Critically, cesium doping strengthens the perovskite lattice itself, slowing ion migration and boosting intrinsic stability. However, a significant gap