Bifacial carbodithioate-lead chelating for efficient and robust inverted perovskite solar cells

Low-dimensional conversion of lead iodide at perovskite grain boundaries (GBs) is of importance to address the interfacial instability of perovskite solar cells (PSCs), while current strategies relying on organic cations interacted with A/X site to low-dimensional lead-halide complexes are challenged by the instability caused by the introduction or residual cations and halides in perovskite films. Present work proposes and verifies a strategy of multidentate carbodithioate-lead chelation (MCLC), which is able to form a robust one-dimensional structure at the GBs, not only reducing interfacial defects and residual stress but also enhancing interfacial carrier transport in perovskite while substantially…

• NU
  Northwestern University
• NN
  National Natural Science Foundation of China

  Awards: 52203338, 22375163
• NP
  Northwestern Polytechnical University
• SK
  State Key Laboratory of Solidification Processing