In situ imaging of the atomic phase transition dynamics in metal halide perovskites.

ABSTRACT: Phase transition dynamics are an important concern in the wide applications of metal halide perovskites, which fundamentally determine the optoelectronic properties and stabilities of perovskite materials and devices. However, a more in-depth understanding of such a phase transition process with real atomic resolution is still limited by the immature low-dose electron microscopy and in situ imaging studies to date. Here, we apply an emergent low-dose imaging technique to identify different phase structures (α, β and γ) in CsPbI₃ nanocrystals during an in-situ heating process. The rotation angles of PbI₆ octahedrons can be measured in these images to quantitatively describe the thermal-induced phase distribution and phase transition. Then, the dynamics of such a phase

SUBMITTER: Ma M 

PROVIDER: S-EPMC10628210 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature