Qingyue Cui, Shengzhong Frank Liu,* and Kui Zhao*

ABSTRACT:

In the past three years, metal-free perovskites have garnered significant interest
as promising candidates for utilization in next-generation wearable electronics. A variety of
different molecular structures for these perovskites have been designed for different
applications. However, there is still no systematic understanding that can elucidate the
relationship between the structural details and properties of perovskites. This would provide a
helpful guide for designing a metal-free perovskite with the desired packing structure and
properties. Herein, we summarize recently reported structural and functional insights into
metal-free perovskites. The underlying design of the molecular structure and its role in the
packing structure and resulting properties are explained. In addition, important factors and
challenges in the design of a molecular structure that will be useful for future applications are
discussed. This information will help enrich the library of potential structures and future
applications of metal-free perovskites, which is believed to be much larger than is currently
known.

doi:
https://doi.org/10.1021/acs.jpclett.2c01044