Two-dimensional lead-free double perovskite ferroelastics with dynamic thermochromism.

ABSTRACT: Ferroelastics, as a key branch of ferroic materials, are vital for mechanical switches, energy conversion, etc. While research on ferroelastic organic-inorganic hybrid perovskites has laid a preliminary foundation, in-depth exploration is still needed to expand their material system and functional integration. In this work, we constructed two perovskite ferroelastics using cyclobutylmethanaminium (CBA⁺) as the cationic template. First, the lead-based (CBA)₂PbBr₄ exhibits a ferroelastic phase transition at Curie temperature (T _c) = 383.4 K (mmmF2/m). To address lead toxicity, we developed the lead-free double perovskite (CBA)₄AgBiBr₈ (T _c = 346.7 K, 4/mmmF2/m), which

SUBMITTER: Su CY 

PROVIDER: S-EPMC12598617 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature