Composition-Graded Cesium Lead Halide Perovskite Nanowires with Tunable Dual-Color Lasing Performance

Advanced Materials
Ling HuangChun-Hua Yan

Abstract

Cesium lead halide (CsPbX3 ) perovskite has emerged as a promising low-threshold multicolor laser material; however, realizing wavelength-tunable lasing output from a single CsPbX3 nanostructure is still constrained by integrating different composition. Here, the direct synthesis of composition-graded CsPbBrx I3-x nanowires (NWs) is reported through vapor-phase epitaxial growth on mica. The graded composition along the NW, with an increased Br/I from the center to the ends, comes from desynchronized deposition of cesium lead halides and temperature-controlled anion-exchange reaction. The graded composition results in varied bandgaps along the NW, which induce a blueshifted emission from the center to the ends. As an efficient gain media, the nanowire exerts position-dependent lasing performance, with a different color at the ends and center respectively above the threshold. Meanwhile, dual-color lasing with a wavelength separation of 35 nm is activated simultaneously at a site with an intermediate composition. This position-dependent dual-color lasing from a single nanowire makes these metal halide perovskites promising for applications in nanoscale optical devices.

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Citations

Aug 28, 2019·Chemical Communications : Chem Comm·Tao SongHao-Li Zhang
Jan 16, 2020·Chemical Society Reviews·Zhichao ZengChunhua Yan
Jan 22, 2020·Chemical Society Reviews·Haiyun DongYong Sheng Zhao
Sep 11, 2019·Angewandte Chemie·Bing TangLong Zhang
Nov 27, 2019·Materials·Elena V UshakovaAlexander V Baranov
Mar 17, 2019·Materials·Minas M StylianakisKonstantinos Petridis
Jul 13, 2021·Chemical Reviews·Jie ChenOsman M Bakr
Aug 6, 2021·ACS Applied Materials & Interfaces·Shanshan YanKar Wei Ng
Feb 6, 2020·ACS Applied Materials & Interfaces·Jinyang LiuFachun Lai
Jun 9, 2020·Journal of the American Chemical Society·Tong CaiOu Chen
Dec 5, 2018·The Journal of Physical Chemistry Letters·Tong CaiOu Chen

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