Dimensionality Modulation in Halide Perovskites

The ability of halide perovskites to be networked in zero dimensional (0D) nanocrystals, 1D nanowires, and 2D sheets in addition to the 3D crystal form, greatly enhances their compositional and property tunability. In this chapter, we review the various synthesis techniques used by researchers to fabricate low-dimensional halide perovskites. To fully utilize the dimensionality modulation offered by halide perovskites, it is imperative to understand the unique photophysical properties of all these low dimensional forms. Therefore, we highlight the morphological, structural, elemental, and theoretical characterizations performed in literature to develop insights into the low-dimensional perovskites. The distinctive optoelectronic properties of low-dimensional halide perovskites provide opportunities for wide range of device applications, which have been briefly covered in this chapter. Finally, toxicity and stability of halide perovskites remain an open challenge. We conclude the chapter by emphasizing the importance of a holistic approach that includes deep understanding of the structure–property correlations to resolve current challenges and make low-dimensional perovskites promising materials for future applications.