Modulating phase composition and crystallization of 2D Ruddlesden-Popper perovskite films <i>via</i> a polyvinylidene fluoride buried interface.

ABSTRACT: Uncontrolled crystallization and phase distribution remain major challenges in two-dimensional (2D) Ruddlesden-Popper (RP) perovskite films, often leading to the formation of undesirable small-n phases, poor out-of-plane orientation, and high defect density. Although polymer interlayers have been applied to improve film morphology, the underlying mechanisms and their effectiveness in quasi-2D systems remain insufficiently clarified. In this study, we present an effective interfacial engineering strategy to control phase distribution in two-dimensional (2D) Ruddlesden-Popper (RP) perovskite by incorporating an ultra-thin polyvinylidene fluoride (PVDF) interlayer at the buried interface. Comprehensive characterization reveals that the PVDF-modified interface significantly suppresses t

SUBMITTER: Meng J 

PROVIDER: S-EPMC12670139 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature