Self‐assembled monolayers accelerating perovskite/silicon tandem solar cells

Abstract The simple solution processing of perovskite materials, combined with the high efficiency potential of tandem structures and the mature silicon infrastructure, makes perovskite/silicon tandems highly attractive for advancing cost‐effective and high‐performance photovoltaic technologies. In recent years, lots of work has been reported in improving device efficiency and enhancing long‐term stability by optimizing the hole transport layer (HTL). In this perspective, we outline the limitations of conventional hole transport materials used for wide‐bandgap (WBG) perovskite subcells in tandem devices. We then briefly summarize the development of perovskite/silicon tandem solar cells (PS‐TSCs) and highlight the landmark breakthroughs. Finally, we emphatically discuss and comment on the application and challenge of self‐assembled monolayers (SAMs) in perovskite/silicon tandems. We hope this perspective will enable researchers to have a clearer understanding of recent research based on perovskite/silicon tandem and inspire more meaningful work in the future. image