Multiple-Noncovalent-Interaction-Stabilized Layered Dion–Jacobson Perovskite for Efficient Solar Cells

• DOI: 10.1021/acs.nanolett.1c01505
• Publication Date: 2021-06-23T19:25:24Z
• Authors: Guangwei Lv; Ling Li; Di Lu; Zhiyuan Xu; Yixin Dong; Qiaohui Li; Zhitao Chang; Wan-Jian Yin; Yongsheng Liu
• Keywords: Non-covalent interactions; Thermal Stability; Tandem

Two-dimensional Dion–Jacobson (DJ) perovskites have shown improved structure stability in comparison with Ruddlesden–Popper (RP) perovskites. However, the mechanism behind is still largely unexplored. Here a multifluorinated aromatic spacer, namely, 4F-PhDMA, has been successfully developed for 2D DJ It found that perovskite 4F-PhDMA spacer exhibits high dissociation energy due to multiple noncovalent interactions. The optimized device based on (n = 4) champion efficiency of 16.62% much light and thermal stability. This higher than control using an unfluorinated 4, PCE 10.11%) among highest efficiencies aromatic-spacer-based solar cells (PSCs). Our work highlights importance incorporating interactions by employing achieve PSCs both