Graphene Coated Porous Semiconductor Nanocomposites for High Performance Electronics and Photonics

用于高性能电子和光子学的石墨烯涂层多孔半导体纳米复合材料

• 批准号: RGPIN-2016-05007
• 负责人: Arès, Richard
• 金额: $ 2.99万
• 依托单位: Université de Sherbrooke
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2016
• 资助国家: 加拿大
• 起止时间: 2016-01-01 至 2017-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=615434
• 关键词: Graphene; Coated; Porous; Semiconductor; Nanocomposites

Nanostructured semiconductor materials have had a major effect on our daily lives by enabling powerful technologies like lasers, solid-state lighting, powerful and fast electronics, photonics and high performance solar cells. More recently semiconductors were modified through electrochemical processing to make the monocrystal porous and to give it new properties. Porous silicon has attracted a lot of interest for its range of properties, from visible light emission, high specific surface area, reduced mechanical stiffness, or adjustable lattice constant through oxidation. Graphene on the other hand, is a material with properties that can potentially generate highly disruptive new technologies, in sensing, energy storage, electronics and photovoltaics to name a few. In the recent years, my team has laid the foundation for the synthesis of a specific kind of nanostructured material: nano- and meso-porous semiconductors. Their nanometer-scale internal structures can also display quantum confinement effects. The proposed 5-year research program will use the porous semiconductor structure to incorporate graphene and coat its internal surface area to form a new kind of nano-composite, called « graphene-coated porous semiconductor » nano-composite. The high internal surface area of the porous semiconductor will allow the integration of large quantities of graphene with the corresponding benefits. However, much remains to be understood, on the synthesis process as much as on the material properties that it creates. My program will operate around two main streams. The first stream will focus on the synthesis process and nano composite properties that it produces. The incorporation process must be understood and optimized to generate a form of graphene as close as possible to the « pristine » state to gain full benefits. I will explore the range of properties that can be achieved by varying the underlying porous matrix structure (porosity, crystallite size). Mechanical, thermal and transport properties, along with photo refractive properties will be studied. The second stream will use these results to explore possible applications where the new nano composites can be exploited. The nano composite will be used as interlayers for the high quality epitaxial growth of GaN on silicon wafers. The effect of the graphene on the temperature stability of the nano-composite, a necessary condition for success will also be studied.

纳米结构半导体材料通过实现强大的技术，如激光、固态照明、强大而快速的电子、光子学和高性能太阳能电池，对我们的日常生活产生了重大影响。最近，通过电化学处理对半导体进行了修饰，使单晶具有多孔性，并赋予其新的性能。多孔硅因其一系列特性而引起了人们的广泛兴趣，包括可见光发射、高比表面积、降低的机械刚度或通过氧化可调节的晶格常数。另一方面，石墨烯是一种具有特性的材料，可以在传感、储能、电子和光伏等领域产生高度颠覆性的新技术。近年来，我的团队为合成一种特殊的纳米结构材料奠定了基础：纳米和介孔半导体。它们的纳米级内部结构也可以表现出量子约束效应。这项为期5年的研究计划将利用多孔半导体结构结合石墨烯，并将其内表面涂覆，形成一种新型纳米复合材料，称为“石墨烯涂层多孔半导体”纳米复合材料。多孔半导体的高内表面积将允许大量集成石墨烯，并带来相应的好处。然而，在合成过程和它所创造的材料特性上，还有许多有待了解的地方。