Epitaxial Growth of Lattice‐Matched BaWO4/CH3NH3PbX3 (X = Cl, Br, I) Hetero‐Micro/Nanostructure with Suppressed Halide Ion Migration
Source abstract
Abstract
Abstract Intrinsic instability of lead halide perovskites has always been a key obstacle to manifest their excellent optoelectronic applications. Here, a solvent‐free thermally driven heteroepitaxial growth strategy is proposed to assemble BaWO4/MAPbX3 (MA = CH3NH3+; X = Cl−, Br−, or I−) micro‐nanostructure. Tetragonal BaWO4 matrix restrains the halogen ion migration in epitaxial MAPbX3 thanks to their perfect lattice matching degrees, also imparting the integration of exceptional durability to light, heat, polarity solvents, and capabilities to fine‐tune the luminescent colors. Furthermore, MABr‐triggered surface nucleation of MAPbBr3 and its removal by H2O appear with switchable and reversible color changes, demonstrating great potential in advanced anticounterfeiting. The general approach in engineering heteroepitaxy of MAPbX3 heterostructure opens up a new idea toward improved stability by the lattice matching principle.
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Research context
OpenAlex topics: Perovskite Materials and Applications · Luminescence Properties of Advanced Materials · Solid-state spectroscopy and crystallography
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Chemistry College of Sciences Northeastern University Shenyang 110819 P. R. China
State Key Laboratory of Rare Earth Resource Utilization Chang Chun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 P. R. China
Funding
National Natural Science Foundation of China · Fundamental Research Funds for the Central Universities
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