Iodine Stabilization in Perovskite Lattice for Internal Stress Relief.

Atomic iodine ionization in perovskite crystals leads to defect formation, lattice distortion, and the occurrence of localized micro-strain. These atomic-level chemical and mechanical effects significantly alter the electronic band landscape, profoundly affecting device performance. While iodine stabilization effects have traditionally been focused on stability, their impact on electrical properties, particularly the coupling effect with internal stress and lattice strain, remains underexplored.

Potential Water Collection From Air by Chloride Perovskites.

Directly capturing water from the air has become a compelling strategy to secure water resources. Yet, challenges persist with sorption-based hygroscopic materials, such as inadequate water adsorption efficiency, material degradation post-adsorption, and the need for energy input during water collection. This study introduces an alternative category of sorbent materials potentially for atmospheric water harvesting-metal chloride perovskites-that exhibit spontaneous water vapor adsorption and liquid water collection.