Photon Transport in One-Dimensional Incommensurately Epitaxial CsPbX3 Arrays

• DOI: 10.1021/acs.nanolett.6b04297
• Publication Date: 2016-11-16T19:59:23Z
• Authors: Yiping Wang; Xin Sun; Ravichandran Shiv...; Yunbo Yang; Zhizhong Chen; Yuwei Guo; Gwo-Ching Wang; Esther Wertz; Felix Deschler; Zhonghou Cai; Hua Zhou; Toh-Ming Lu; Jian Shi
• Keywords: 02 engineering and technology; 0210 nano-technology

One-dimensional nanoscale epitaxial arrays serve as a great model in studying fundamental physics and for emerging applications. With an increasing focus laid on the Cs-based inorganic halide perovskite out of its outstanding material stability, we have applied vapor phase epitaxy to grow well aligned horizontal CsPbX3 (X: Cl, Br, or I or their mixed) nanowire arrays in large scale on mica substrate. The as-grown nanowire features a triangular prism morphology with typical length ranging from a few tens of micrometers to a few millimeters. Structural analysis reveals that the wire arrays follow the symmetry of mica substrate through incommensurate epitaxy, paving a way for a universally applicable method to grow a broad family of halide perovskite materials. The unique photon transport in the one-dimensional structure has been studied in the all-inorganic Cs-based perovskite wires via temperature dependent and spatially resolved photoluminescence. Epitaxy of well oriented wire arrays in halide perovskite would be a promising direction for enabling the circuit-level applications of halide perovskite in high-performance electro-optics and optoelectronics.