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: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=644108
• 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对我们的日常生活产生了重大影响，使强大的技术，如激光，固态照明，强大和快速的电子，光子学和高性能太阳能电池。 最近，半导体通过电化学处理进行了改性，使单晶多孔并赋予其新的特性。 多孔硅因其一系列特性而引起了人们的广泛兴趣，这些特性包括可见光发射、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，石墨烯是一种具有可能产生高度破坏性新技术的材料，例如传感，储能，电子和光电子等。近年来，我的团队为合成一种特定的纳米结构材料奠定了基础：纳米和介孔半导体。 它们的纳米尺度内部结构也可以显示量子限制效应。拟议的5年研究计划将使用多孔半导体结构结合石墨烯并涂覆其内表面区域，以形成一种新型的纳米复合材料，称为“石墨烯涂覆的多孔半导体”纳米复合材料。 多孔半导体的高内表面积将允许大量石墨烯的集成，并具有相应的益处。然而，在合成过程以及它所产生的材料特性方面，还有很多东西有待理解。我的计划将围绕两个主流运作。 第一个流将集中在合成过程和纳米复合材料的性能，它产生。 必须理解和优化掺入过程，以产生尽可能接近“原始”状态的石墨烯形式，以获得全部益处。我将探讨的性质，可以通过改变底层多孔基质结构（孔隙率，微晶尺寸）的范围。 机械，热和运输性能，沿着与光折射性能将被研究。 第二批将使用这些结果来探索新纳米复合材料的可能应用。 该纳米复合材料将用作高质量GaN在硅片上外延生长的中间层。 还将研究石墨烯对纳米复合材料的温度稳定性的影响，这是成功的必要条件。