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. (Figure presented.).