The effects of organic cation rotation in hybrid Organic-Inorganic Perovskites: A critical review

The emergence of hybrid organic-inorganic perovskites (HOIPs) has made great progress in the photo-voltaic (PV) field. In recent years, more and more articles have shown that the modification of organic cations can improve HOIPs' performance, and a surge of interest has been paid to rethink the effect of organic cations. In our review, we summarized the influences of organic cation rotation on structure, optoelectrical properties, and stability. We also provide theoretical insights into why and how organic cations affect the performance of HOIPs in experiments. At last, we have proposed possible control meth-ods and development directions in the hope that the rotation of organic cation can be better observed and utilized in inherently tunable perovskite materials, solar cells, LED, photocatalysis, photothermal conver-sion, and other related fields. (c) 2022 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).