Defect‑Anchored Dipole Molecules Induce Surface Polarization Facilitating High‑Performance Inverted Perovskite Solar Cells (IMAGE)

Shanghai Jiao Tong University Journal Center

Defect‑Anchored Dipole Molecules Induce Surface Polarization Facilitating High‑Performance Inverted Perovskite Solar Cells

Caption

  • The carbonyl group and chloride ion of 4-aminocyclohexanone hydrochloride (ACHCl) can synergistically passivate surface defects in the perovskite, thereby mitigating the defect-assisted recombination.
  • The ACH+ cations can anchor to positively charged surface defects through the carbonyl group, forming a cationic dipole layer.
  • The formation of an ACH+ cationic dipole layer induces surface polarization, which promotes favorable energy-level alignment and reduces interfacial energy losses.

Credit

Weichun Pan, Jihuai Wu*, Jiexi Pan, Shanyue Wei, Lina Tan, Wenjing Li, Deng Wang, Xuping Liu, Yiming Xie, Jianming Lin, Zhang Lan*.

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