Pyridine-Based Multifunctional Surface Passivators Enable Efficient and Stable Perovskite Indoor Photovoltaics.

ABSTRACT: Efficient surface passivation is crucial for mitigating defect-induced recombination losses in perovskite-based indoor photovoltaics (IPVs), where charge carrier dynamics are particularly sensitive to trap states under low-intensity illumination. Here, we introduce two pyridine-based passivators, tris[4-(pyridin-4-yl)phenyl]amine (TPAP) and its ionic counterpart (TPAP1), to achieve high-performance and stable perovskite IPVs. These passivators strongly coordinate with under-coordinated Pb²⁺ ions, effectively reducing trap densities and improving hydrophobicity. When incorporated into lead-based triple-cation CsFAMA perovskite films, TPAP and TPAP1 significantly suppress nonradiative recombination, leading to notable improvements in device performance.

SUBMITTER: Han Y 

PROVIDER: S-EPMC12412104 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature