title: Vapor-Phase Epitaxial Growth of Aligned Nanowire Networks of Cesium Lead Halide Perovskites (CsPbX3, X = Cl, Br, I).
abstract: With the intense interest in inorganic cesium lead halide perovskites and their nanostructures for optoelectronic applications, high-quality crystalline nanomaterials with controllable morphologies and growth directions are desirable. Here, we report a vapor-phase epitaxial growth of horizontal single-crystal CsPbX3(X = Cl, Br, I) nanowires (NWs) and microwires (MWs) with controlled crystallographic orientations on the (001) plane of phlogopite and muscovite mica. Moreover, single NWs, Y-shaped branches, interconnected NW or MW networks with 6-fold symmetry, and, eventually, highly dense epitaxial network of CsPbBr3with nearly continuous coverage were controllably obtained by varying the growth time. Detailed structural study revealed that the CsPbBr3wires grow along the [001] directions and have the (100) facets exposed. The incommensurate heteroepitaxial lattice match between the CsPbBr3and mica crystal structures and the growth mechanism of these horizontal wires due to asymmetric lattice mismatch were proposed. Furthermore, the photoluminescence waveguiding and good performance from the photodetector device fabricated with these CsPbBr3networks demonstrated that these well-connected CsPbBr3NWs could serve as straightforward platforms for fundamental studies and optoelectronic applications.
authors.affiliation: Department of Chemistry, University of Wisconsin-Madison , 1101 University Avenue, Madison, Wisconsin 53706, United States.|International Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University , Shaanxi 710049, P. R. China.
authors.forename: Jie
authors.identifier: 0000-0002-2007-0896
authors.initials: J
authors.lastname: Chen
authors.affiliation: Department of Chemistry, University of Wisconsin-Madison , 1101 University Avenue, Madison, Wisconsin 53706, United States.
authors.forename: Yongping
authors.initials: Y
authors.lastname: Fu
authors.affiliation: Department of Chemistry, University of Wisconsin-Madison , 1101 University Avenue, Madison, Wisconsin 53706, United States.
authors.forename: Leith
authors.initials: L
authors.lastname: Samad
authors.affiliation: Department of Chemistry, University of Wisconsin-Madison , 1101 University Avenue, Madison, Wisconsin 53706, United States.
authors.forename: Lianna
authors.initials: L
authors.lastname: Dang
authors.affiliation: Department of Chemistry, University of Wisconsin-Madison , 1101 University Avenue, Madison, Wisconsin 53706, United States.
authors.forename: Yuzhou
authors.initials: Y
authors.lastname: Zhao
authors.affiliation: International Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University , Shaanxi 710049, P. R. China.
authors.forename: Shaohua
authors.initials: S
authors.lastname: Shen
authors.affiliation: International Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University , Shaanxi 710049, P. R. China.
authors.forename: Liejin
authors.initials: L
authors.lastname: Guo
authors.affiliation: Department of Chemistry, University of Wisconsin-Madison , 1101 University Avenue, Madison, Wisconsin 53706, United States.
authors.forename: Song
authors.identifier: 0000-0001-8693-7010
authors.initials: S
authors.lastname: Jin
keywords: Cesium lead halide perovskites; nanowire networks; optoelectronic devices; vapor-phase epitaxial growth; waveguide