Self-Assembled Monolayer-based Hole Transporting Materials for Invert Perovskite Solar Cells

The escalating global energy consumption is predominantly attributed to the burgeoning population growth, resulting in increased demand for energy resources; hence, the imperative to shift towards sustainable energy sources is emphasized. In this context, solar energy appears particularly promising due to its abundant, clean, and renewable characteristics. One significant aspect of solar cells is hole transport materials (HTMs), where we are currently witnessing a revolution in hole transport materials based on self-assembled monolayers (SAM-HTMs); this category of materials has significantly contributed to notable enhancements in power conversion efficiencies (PCEs) in inverted perovskite solar cells (PSCs). Despite the fabrication of the first SAM-based PSC occurring in late 2018, SAM-HTMs have emerged as a promising alternative such as PTAA, primarily due to various advantages such, as tunable bandgap, robust interface stability, and easy fabrication. This class of materials holds the potential to advance the energy sector and expedite the rapid industrialization of PSCs.