Dynamic self-assembly of small molecules enables the spontaneous fabrication of hole conductors at perovskite/electrode interfaces for over 22% stable inverted perovskite solar cells

Abstract

The bottom hole transport layer (HTL) is of paramount importance in determining both efficiency and stability of inverted perovskite solar cells (PSCs), however, their surface nature and properties strongly interfere...

Achieving a high open-circuit voltage of 1.339 V in 1.77 eV wide-bandgap perovskite solar cells via self-assembled monolayers

“…In addition, the DCB-BPA device also possesses a higher slope of the Mott–Schottky plots, which signifies faster charge transfer at the HTL/perovskite interface with reduced carrier accumulation. 37 Then, we tested the dark current under bias from −0.1 to 1.2 V to further elucidate the leakage current formed by carrier recombination (Fig. 4b).…”

Key Roles of Interfaces in Inverted Metal-Halide Perovskite Solar Cells

“…Initially, SAMs were used in the production of organic solar cells. The chemical bond formation and enhanced hole and electron transport led to improved optical and electrical properties. ,− SAM is a popular choice for surface modification methods . However, it remains a challenge to deposit ordered dense SAM layers due to the nature of the substrate surface chemistry .…”

Self-assembled monolayers as hole-transporting materials for inverted perovskite solar cells

“…4f). 63 This strategy not only improves the quality of perovskite films, but also passivates the defects at grain boundaries and/or interfaces. A champion PCE of 22.2% along with remarkable long-term environmental stability was achieved.…”

“…(f) Schematic illustration of the dynamic self-assembly (DSA) strategy. Reproduced with permission 63. Copyright 2023 The Royal Society of Chemistry.…”