Molecular ferroelectric self-assembled interlayer for efficient perovskite solar cells

The interfacial molecular dipole enhances the photovoltaic performance of perovskite solar cells (PSCs) by facilitating improved charge extraction. However, conventional self-assembled monolayers (SAMs) face challenges like inadequate interface coverage and weak dipole interactions. Herein, we develop a strategy using a self-assembled ferroelectric layer to modify the interfacial properties of PSCs. Specifically, we employ 1-adamantanamine hydroiodide (ADAI) to establish robust chemical interactions and create a dipole layer over the perovskite. The oriented molecular packing and spontaneous polarity of ferroelectric ADAI generate a substantial interfacial dipole, adjusting band bending at the anode, reducing…

• NN
  National Natural Science Foundation of China

  Awards: 62025403, 22372193, 52202151, Nos. 52173185, 62025403, 62304201 and 12174328, 52173185, 62304201
• FR
  Fundamental Research Funds for the Central Universities
• NS
  Natural Science Foundation of Zhejiang Province

  Award: LD24E030002