Co-adsorbed self-assembled monolayer enables high-performance perovskite and organic solar cells

Self-assembled monolayers (SAMs) have become pivotal in achieving high-performance perovskite solar cells (PSCs) and organic solar cells (OSCs) by significantly minimizing interfacial energy losses. In this study, we propose a co-adsorb (CA) strategy employing a novel small molecule, 2-chloro-5-(trifluoromethyl)isonicotinic acid (PyCA-3F), introducing at the buried interface between 2PACz and the perovskite/organic layers. This approach effectively diminishes 2PACz's aggregation, enhancing surface smoothness and increasing work function for the modified SAM layer, thereby providing a flattened buried interface with a favorable heterointerface for perovskite. The resultant improvements in crystallinity,…

• NN
  National Natural Science Foundation of China

  Awards: P0042930, 22305111
• HK
  Hong Kong Polytechnic University

  Awards: PolyU 25300823, P0042930, 8-8480, 2019B121205001
• GS
  Guangdong Science and Technology Department

  Award: 2019B121205001
• ST
  Science, Technology and Innovation Commission of Shenzhen Municipality

  Award: JCYJ20200109105003940