期刊
ACS NANO
卷 10, 期 2, 页码 2046-2053出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.5b06193
关键词
phosphorene; trion; quasi-one-dimensional; binding energy; optoelectronic
类别
资金
- ACT node of the Australian National Fabrication Facility (ANFF)
- ANU
- Office of Naval Research (USA) [N00014-14-1-0300]
- Australian Research Council [DE140100805]
- ANU Major Equipment Committee [14MEC34]
We report a trion (charged exciton) binding energy of similar to 162 meV in few-layer phosphorene at room temperature, which is nearly 1-2 orders of magnitude larger than those in two-dimensional (2D) transition metal dichalcogenide semiconductors (20-30 meV) and quasi-2D quantum wells (similar to 1-5 meV). Such a large binding energy has only been observed in truly one-dimensional (ID) materials such as carbon nanotubes, whose optoelectronic applications have been severely hindered by their intrinsically small optical cross sections. Phosphorene offers an elegant way to overcome this hurdle by enabling quasi-1D excitonic and trionic behaviors in a large 2D area, allowing optoelectronic integration. We experimentally validated the quasi-1D nature of excitonic and trionic dynamics in phospherene by demonstrating completely linearly polarized light emission from excitons and trions in few-layer phosphorene. The implications of the extraordinarily large trion binding energy in a higher-than-one-dimensional material are far-reaching. It provides a room-temperature 2D platform to observe the fundamental many-body interactions in the quasi-1D region.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据