Enhancing the Performance of Perovskite Solar Cells via the Functional Group Synergistic Effect in Interfacial Passivation Materials

• DOI: 10.1021/acs.jpclett.4c00881
• Publication Date: 2024-04-25T16:29:52Z
• Authors: Zheng Yan; Haoxin Wang; Mengde Zhai; Yi Tian; Cheng Chen; Ming Cheng
• Keywords: Passivation; Electronegativity

Interfacial defects are considered to be a stumbling block in producing highly efficient perovskite solar cells (PSCs), so more reasonable design is required for interfacial passivation materials (IPMs) achieve further improvements PSC performance. Here, we use fluorine atom (−F) and methoxy (−OCH3) functional groups modify the same molecular fragment, obtaining three kinds of IPMs named YZ-301, YZ-302, YZ-303, respectively. Through subtle combination −F −OCH3, fragment YZ-302 exhibits an enhanced electronegativity, rendering correlative IPM with stronger interaction layer. As result, shows best defect hole transport effect at interface, based on treatment achieves efficiency approaching 24%, which better than reference devices other IPMs, it also has excellent device stability.