Molecular templating of layered halide perovskite nanowires

• 成果类型: Article
• 署名作者: Shao, Wenhao; Kim, Jeong Hui; Simon, Jeffrey; Nian, Zhichen; Baek, Sung-Doo; Lu, Yuan; Fruhling, Colton B.; Yang, Hanjun; Wang, Kang; Park, Jee Yung; Huang, Libai; Yu, Yi; Boltasseva, Alexandra; Savoie, Brett M.; Shalaev, Vladimir M.; Dou, Letian
• 署名单位: Purdue University System; Purdue University; Purdue University System; Purdue University; ShanghaiTech University; ShanghaiTech University; Purdue University System; Purdue University; Chinese Academy of Sciences; Institute of Chemistry, CAS; Purdue University System; Purdue University
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-10401
• DOI: 10.1126/science.adl0920
• 发表日期: 2024-05-31
• 页码: 1000-1006
• 关键词: single-crystal; hybrid

摘要

Layered metal-halide perovskites, or two-dimensional perovskites, can be synthesized in solution, and their optical and electronic properties can be tuned by changing their composition. We report a molecular templating method that restricted crystal growth along all crystallographic directions except for [110] and promoted one-dimensional growth. Our approach is widely applicable to synthesize a range of high-quality layered perovskite nanowires with large aspect ratios and tunable organic-inorganic chemical compositions. These nanowires form exceptionally well-defined and flexible cavities that exhibited a wide range of unusual optical properties beyond those of conventional perovskite nanowires. We observed anisotropic emission polarization, low-loss waveguiding (below 3 decibels per millimeter), and efficient low-threshold light amplification (below 20 microjoules per square centimeter).