Amphoteric Ion Bridged Buried Interface for Efficient and Stable Inverted Perovskite Solar Cells

• DOI: 10.1002/adma.202310203
• Publication Date: 2023-11-15T23:28:02Z
• Authors: Yuling Zhang; Runnan Yu; Minghua Li; Zhangwei He; Yiman Dong; Zhiyang Xu; Ruyue Wang; Zongwen Ma; Zhanao Tan
• Keywords: Passivation

Abstract Synergistic morphology and defects management at the buried perovskite interface are challenging but crucial for further improvement of inverted solar cells (PerSCs). Herein, an amphoteric organic salt, 2‐(4‐fluorophenyl)ethylammonium‐4‐methyl benzenesulfonate (4FPEAPSA), is designed to optimize film energy level alignment interface. 4FPEAPSA treatment promotes growth a void‐free, coarse‐grained, hydrophobic by inducing crystal orientation. Besides, dual‐functional can chemically interact with film, passivate iodine formamidine vacancies, tending revert fermi its defect‐free state. Meanwhile, formation p‐type doping facilitate interfacial charge extraction transport PerSCs reduced carrier recombination loss. Consequently, improves efficiency devices 25.03% better storage, heat, humidity stability. This work contributes strengthening systematic understanding interface, providing synergetic approach realize precise control, effective defect suppression, efficient PerSCs.