Demystifying phase transformations in metal halide perovskites

Metal halide perovskites have become one of the most studied optoelectronic materials, but their stability remains a grand challenge due to the lack of understanding of the phase transformation process. Recently, scientists at the University of California, Berkeley have devised direct monitoring methods to track the phase transformation process of metal halide perovskites. Their results shed light on the mechanisms of this phase transformation, providing a basis for stabilizing this class of exciting materials under various conditions.