Photon Transport in One-Dimensional Incommensurately Epitaxial CsPbX3 Arrays

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• 作者：Yiping Wang ; Xin Sun ; Ravichandran Shivanna ; Yunbo Yang ; Zhizhong Chen ; Yuwei Guo ; Gwo-Ching Wang ; Esther Wertz ; Felix Deschler ; Zhonghou Cai ; Hua Zhou ; Toh-Ming Lu ; Jian Shi
• 刊名：Nano Letters
• 出版年：2016
• 出版时间：December 14, 2016
• 年：2016
• 卷：16
• 期：12
• 页码：7974-7981
• 全文大小：583K
• ISSN：1530-6992

文摘

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.