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: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=709555
• 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.

纳米结构的半导体材料通过启用强大的技术，固态照明，功能强大且快速的电子，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，半导体通过电化学处理来修改，以使单晶多孔并赋予其新的特性。从可见光发射，高比表面积，机械刚度降低或可调节的晶格常数通过氧化，多孔硅对其性能范围引起了很大的兴趣。另一方面，石墨烯是具有可能产生高度破坏性的新技术的材料，在感应，储能，电子和光伏数学方面仅举几例。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：纳米和中孔半导体。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覆盖其内部表面积，形成一种新型的纳米复合材料，称为“石墨烯涂层的多孔半导体»纳米复合材料。多孔半导体的高内部表面积将允许将大量石墨烯与相应的益处整合在一起。但是，在综合过程中与其创造的材料属性一样多，还有许多待理解。 我的程序将围绕两个主流运行。第一个流将集中于其产生的合成过程和纳米复合特性。必须对保险过程进行理解和优化，以生成一种与“原始”状态尽可能接近的石墨烯形式，以获得全部利益。我将探讨可以通过改变下面的多孔矩阵结构（孔隙率，结晶石大小）来实现的属性范围。机械，热和传输性能以及照片折射率将进行研究。第二个流将使用这些结果来探索可以探索新的纳米复合材料的可能应用。纳米复合材料将用作硅波上GAN高质量外延生长的层中。石墨烯对纳米复合材料的温度稳定性的影响，成功的必要条件也将是研究。