Amorphous and Nanocrystalline Semiconductors: Growth, Interfaces and Stability

这个项目关注的是人工纳米结构的使用 作为一种工具来研究生长，界面结构和稳定性， 非晶和晶体半导体。 这项研究将 地址结构，结构弛豫，原子扩散和 基于四面体的非晶半导体的晶化 材料（非晶硅和相关材料）。 此外 非晶硅及相关薄膜的生长和性能 电影特别强调了 结构和电子性质。 要使用的技术 包括：1）拉曼散射（用于研究局部成键 和顺序）; 2）X射线反射率（用于研究密度， 界面粗糙度和互扩散）; 3）光吸收， 光电导性（对层中的电子电荷敏感 接口）。 对这些不同的数据进行分析， 不同的技术需要不同的材料假设 和它们的结构。 基于纳米结构的超导体材料 在技术上对于光电探测器是重要的， 阵列、场效应显示驱动器、光伏器件、光学 调制和非线性光学器件以及催化剂， 用于商业反应的催化剂载体。

This project is concerned with the use of artificial nanostructures as a tool to study the growth, interface structure and stability of amorphous and crystalline semiconductors. The research will address structure, structural relaxation, atomic diffusion and crystallization of tetrahedrally-based amorphous semiconductor materials (amorphous silicon and related materials). In addition the growth and properties of amorphous silicon and related thin films with particular emphasis on the relationship between structure and electronic properties. The techniques to be utilized include: 1) Raman scattering (useful for the study of local bonding and order); 2) x-ray reflectivity (useful for the study of density, interface roughness and interdiffusion); 3) optical absorption and photoconductivity (sensitive to the electronic charge in the layers and interfaces). The analysis of the data from these different techniques requires different sets of assumptions about materials and their structure. Nanostructured semiconductor-based materials are important technologically for photoelectronic detectors and arrays, field effect display drivers, photovoltaic devices, optical modulation and non-linear optical devices as well as catalysts and catalyst supports for commercial reactions.