Methylammonium-Free Ink for Blade-Coating of Pure-Phase α-FAPbI₃ Perovskite Films in Air.

ABSTRACT: The α-c (α-FAPbI₃) has been extensively employed in the fabrication of high-efficiency perovskite solar cells, yet heavily relied on multiple additives in upscalable fabrication in air. In this work, a simple α-FAPbI₃ ink is developed for the blade-coating fabrication of phase-pure α-FAPbI₃ in ambient air free from any additives containing extrinsic ions. The introduction of 2-imidazolidinone (IMD) to the FAPbI₃ precursor inks leads to the formation of intermediate phases that change the phase transition pathway from δ-FAPbI₃ to α-FAPbI₃ by tilting the PbI₆ octahedrons with strong coordination to Pb²⁺. Furthermore, the IMD ligands in the intermediate phase gradually escape from the perovskite film durin

SUBMITTER: Liu J 

PROVIDER: S-EPMC11633507 | biostudies-literature | 2024 Dec

REPOSITORIES: biostudies-literature