A Special Additive Enables All Cations and Anions Passivation for Stable Perovskite Solar Cells with Efficiency over 23.

ABSTRACT: Passivating undercoordinated ions is an effective way to reduce the defect densities at the surface and grain boundaries (GBs) of perovskite materials for enhanced photovoltaic performance and stability of perovskite solar cells (PSCs). Here, (BBF) complex is chosen as a multifunctional additive, which contains both C₇H₉N and BF₃ groups working as Lewis base and Lewis acid, respectively, can bond with Pb²⁺/I^- and FA⁺ on the surface and in the GBs in the perovskite film, affording passivation of both cation and anion defects. The synergistic effect of the C₇H₉N and BF₃ complex slows the crystallization during the perovskite film deposition to improve the crystalline quality, which reduces the

SUBMITTER: Zhao W 

PROVIDER: S-EPMC8346611 | biostudies-literature | 2021 Aug

REPOSITORIES: biostudies-literature