General synthesis of ionic-electronic coupled two-dimensional materials.

ABSTRACT: Two-dimensional (2D) AMX₂ compounds are a family of mixed ionic and electronic conductors (where A is a monovalent metal ion, M is a trivalent metal, and X is a chalcogen) that offer a fascinating platform to explore intrinsic coupled ionic-electronic properties. However, the synthesis of 2D AMX₂ compounds remains challenging due to their multielement characteristics and various by-products. Here, we report a separated-precursor-supply chemical vapor deposition strategy to manipulate the chemical reactions and evaporation of precursors, facilitating the successful fabrication of 20 types of 2D AMX₂ flakes. Notably, a 10.4 nm-thick AgCrS₂ flake shows superionic behavior at room temperature, with an ionic conductivity of 192.8 mS/cm. Room temperatu

SUBMITTER: Xu X 

PROVIDER: S-EPMC11111738 | biostudies-literature | 2024 May

REPOSITORIES: biostudies-literature