Advantages and challenges of self-assembled monolayer as a hole-selective contact for perovskite solar cells

Abstract Charge-transporting layers (CTLs) are important in determining the performance and stability of perovskite solar cells (PSCs). Recently, there has been considerable use self-assembled monolayers (SAMs) as charge-selective contacts, especially for hole-selective SAMs inverted PSCs well involving tandem cells. The SAM-based contact shows many advantages over traditional thin-film organic/inorganic CTLs, including reduced cost, low optical electric loss, conformal coating on a rough substrate, simple deposition large-area substrate easy modulation energy levels, molecular dipoles surface properties. incorporation various resulted high-efficiency single junction This topical review summarizes both challenges discusses potential direction future studies.