Atomic Resolution Imaging of Halide Perovskites
Atomic resolution image of 2D halide perovskites. (a) Cubic CsPbBr3 unit cell model. (b) Structure model of single layer 2D CsPbBr3 nanosheet. (c) Atomically resolved phase image obtained by low dose-rate in-line holography.
Developed a low-dose method to enable atomic resolution imaging of halide perovskites without introducing structural damages.
Significance and Impact
Our approach offers unprecedented opportunities to better understand halide perovskites at the atomic level as well as other radiation-sensitive materials.
- The radiation-sensitive nature of halide perovskites has hindered structural studies at the atomic scale.
- We overcome this obstacle by applying low dose-rate in-line holography.
- This technique successfully yields the genuine atomic structure of ultrathin two-dimensional CsPbBr3 halide perovskites and enables an unambiguous structural analysis of coexisting high-temperature and low-temperature phases in single particles.