Breaking the Boundaries of the Goldschmidt Tolerance Factor with Ethylammonium Lead Iodide Perovskite Nanocrystals.

ABSTRACT: We report the synthesis of ethylammonium lead iodide (EAPbI₃) colloidal nanocrystals as another member of the lead halide perovskites family. The insertion of an unusually large A-cation (274 pm in diameter) in the perovskite structure, hitherto considered unlikely due to the unfavorable Goldschmidt tolerance factor, results in a significantly larger lattice parameter compared to the Cs-, methylammonium- and formamidinium-based lead halide perovskite homologues. As a consequence, EAPbI₃ nanocrystals are highly unstable, evolving to a nonperovskite δ-EAPbI₃ polymorph within 1 day. Also, EAPbI₃ nanocrystals are very sensitive to electron irradiation and quickly degrade to PbI₂ upon exposure to the electron beam, following a mechan

SUBMITTER: Guvenc CM 

PROVIDER: S-EPMC11752489 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature