Fast, Highly Stable, and Low-Bandgap 2D Halide Perovskite Photodetectors Based on Short-Chained Fluorinated Piperidinium as a Spacer.

ABSTRACT: Ruddlesden-Popper (RP) two-dimensional (2D) halide perovskite (HP), with attractive structural and optoelectronic properties, has shown great potential in optoelectrical devices. However, the relatively wide bandgap (E_g) and stability, which cause inferior efficiency, prevent its feasibility from further applications. To tackle these issues, for the first time, a novel fluorine-containing piperidinium spacer, (3-HCF₂CF₂CH₂OCH₂-PPH⁺), abbreviated as (4FH-PPH⁺), has been designed for the stable and efficient n = 1 2D HPs. Its fluorophobicity can significantly enhance the noncovalent interactions between cations and [PbI₆]^4- octahedra. The observed E_g of the fluor

SUBMITTER: Lu N 

PROVIDER: S-EPMC11783540 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature