EAGER: Coupled Opto-Electro-Mechanics in Semiconducting Phosphorene

EAGER：半导体磷烯中的耦合光机电

• 批准号: 1641073
• 负责人: Deji Akinwande
• 金额: $ 12.04万
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-07-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1641073&HistoricalAwards=false
• 关键词: EAGER; Coupled; Opto; Electro; Mechanics

Abstract:Non-TechnicalThough black phosphorus was discovered in 1914, understanding of its semiconducting properties in the limit of a few atomic layers are at a nascent state with very few experimental results. There exists no significant application of this atomically-thin nanomaterial to benefit society to date. This research effort will comprehensively investigate the effect of mechanical forces via strain as degrees of freedom for probing several phenomena experimentally including changes in its crystal structure, absorption and emission of light, and transition from a semiconducting to a metallic behavior, all of which, can be utilized to enable novel optoelectronic devices and chips. In light of the recent progress on growing crystals of black phosphorus, this research effort on the strong coupling of mechanical forces on its unique electrical and optical properties can result in breakthrough device applications at practical scales. In addition, graduate and undergraduate students from diverse backgrounds will be trained in conducting research at the frontier of nanomaterials and electronics.Technical:Phosphorene is poised to be the most attractive two-dimensional material owing to its high charge mobilities approaching that of graphene, and its thickness tunable bandgap that can be as large as that of semiconducting transitional metal di-chalcogenides. In essence, phosphorene represents the much sought after high-mobility, tunable direct bandgap atomically layered crystal that is ideal for nanoelectronics, optoelectronics and flexible electronics. In addition, the unique puckered lattice affords in-plane anisotropy that is absent in graphene, leading to strong coupling of mechanical forces with electrons, photons, and phonons that can enable advanced straintronics for efficient nanoscale energy conversion devices and transformational flexible technology. The proposed effort will focus on the strong coupling of mechanical forces on engineering the unique electrical and optical properties of phosphorene that can result in breakthrough device applications. The research effort will consist of two experimental approaches, investigation of the effects of uniaxial strain on the optoelectronic properties, and studies on hydrostatic pressure in triggering structural and electronic phase transitions.

摘要：尽管1914年发现了黑磷，但对其半导体性质的了解仅限于几个原子层，实验结果很少。到目前为止，这种原子薄的纳米材料还没有重大的应用来造福社会。这项研究工作将全面考察作为自由度的机械力对实验中几种现象的影响，包括晶体结构的变化，光的吸收和发射，以及从半导体到金属行为的转变，所有这些都可以用来实现新的光电子器件和芯片。鉴于黑磷晶体生长的最新进展，这种机械力的强耦合对其独特的电学和光学性质的研究将导致在实际规模上的突破性器件应用。此外，来自不同背景的研究生和本科生将接受在纳米材料和电子学前沿领域进行研究的培训。技术：磷烯有望成为最具吸引力的二维材料，因为它的高电荷迁移率接近石墨烯，其厚度可调的带隙可以与半导体过渡金属双硫属化合物的带隙一样大。从本质上讲，膦代表着备受追捧的高迁移率、可调直接带隙原子分层晶体，是纳米电子学、光电子学和柔性电子学的理想之选。此外，独特的褶皱晶格提供了石墨烯所没有的平面内各向异性，导致了机械力与电子、光子和声子的强烈耦合，从而使先进的应变电子学能够实现高效的纳米级能量转换设备和变革性的灵活技术。拟议的努力将集中在机械力的强烈耦合上，以工程磷烯独特的电学和光学特性，从而实现突破性的设备应用。研究工作将包括两个实验方法，研究单轴应变对光电性质的影响，以及研究静水压力在触发结构和电子相变中的作用。