超细一维Si纳米晶的可控制备、光电性能及高压研究

项目名称： 超细一维Si纳米晶的可控制备、光电性能及高压研究

项目编号： No.11304020

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 数理科学和化学

项目作者： 吕航

作者单位： 渤海大学

项目金额： 25万元

中文摘要： 新能源的开发一直是一项重大的世界性课题，近年来，以太阳能利用为目标的一维Si纳米材料的制备和性能研究成为热点。人们希望通过调控一维Si纳米材料的结构和尺寸有效提高其光电性能。本项目利用胶束法结合化学气相沉积法实现具有高结晶度，高光电转化效率的超细一维Si纳米材料（包括纳米线，纳米管以及复合材料）的可控制备，并研究其光电性能，探索提高一维Si纳米材料光电转化效率的途径；利用原位高压实验研究超细一维Si纳米材料在高压下结构、表面电子能态和光电性能变化规律，从原子角度研究一维纳米结构光电性能的影响因素，同时揭示不同形貌和尺寸对材料结构稳定性和相变规律的影响，拓展低维纳米体系下的高压结构相变研究领域。该工作不仅对于揭示影响材料光电性能的物理本质具有理论意义而且对于探索和设计新型光电材料具有重要应用价值。

中文关键词： 硅；纳米线；纳米管；光电性能；高压

英文摘要： The exploitation of new energy is still an important world subject. In recent years, for good utilization of solar energy, synthesis and property investigations of one-dimensional Si nanomaterials become a research focus. It's hoped that the photoelectric properties of can be improved by controlling the size and structure of one-dimensional Si nanomaterials. In this project, Ultrathin one-dimensional Si nanomaterials with tunable diameter and high crystalline will be synthesised by CVD method using micellar nanoparticles as catalyst templates, and their photoelectric properties will also be studied, which could provide guidance suggestion for the fabrication of new functional photoelectric materials; To study the change of their crystal structure,surface electronic states and photoelectroc properties under high pressure, in-situ high pressure studies will be carried out on ultrathin one-dimensional Si nanomaterials. Using high pressure tools, we can investigate the influencing factors on the photoelectric properties of one-dimensional nanomaterial in terms of atomic interaction, reveal the effects of morphologies and sizes on high pressure phase transitions, and expand the research field of high pressure structure transiton for low-dimensional nanosystems. Our project has theoretical significance for revealing t

英文关键词： Si；nanowires；nanotubes；photoelectric properties；high pressure