Affiliation:
1. Department of Chemistry College of Sciences Northeastern University Shenyang 110819 P. R. China
2. State Key Laboratory of Rare Earth Resource Utilization Chang Chun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 P. R. China
Abstract
AbstractIntrinsic 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 BaWO4matrix restrains the halogen ion migration in epitaxial MAPbX3thanks 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 MAPbBr3and its removal by H2O appear with switchable and reversible color changes, demonstrating great potential in advanced anticounterfeiting. The general approach in engineering heteroepitaxy of MAPbX3heterostructure opens up a new idea toward improved stability by the lattice matching principle.
Funder
National Natural Science Foundation of China
Fundamental Research Funds for the Central Universities
Subject
Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials
Cited by
21 articles.
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