Shining Light on the Structure of Lead Halide Perovskite Nanocrystals

Lead halide perovskite nanocrystals (NCs) have attracted great attention owing to the simplicity of their synthesis and excellent defect-tolerance nature. They not only demonstrate outstanding optical and electronic properties, but also hold substantially ionic lattices with some counterintuitive structural features that are significantly different from conventional colloidal semiconductor NCs such as CdSe and InP. In this Review, we summarize and assess the recent advances in the understanding of structural characteristics of lead halide perovskite NCs. We specifically focus on the role of intrinsic defects, NC size, dopants, alloying, and external stimuli in affecting their structure. Moreover, we highlight the use of atomic resolution imaging technique in investigating their microstructural characteristics. Finally, we discuss open questions and present our perspectives on future research directions in the exciting field of science.

Automated summary

Lead halide perovskite nanocrystals are highly regarded for their simple synthesis and excellent defect-tolerance, showcasing exceptional optical and electronic properties with unique ionic lattice structures. This review focuses on the impact of intrinsic defects, size, dopants, alloying, and external stimuli on their structures, as well as the use of atomic resolution imaging techniques to investigate their microstructural characteristics. Open questions and future research directions in this dynamic scientific field are also discussed.