一维纤锌矿基异质半导体纳米结构的制备及其光电特性的研究

项目名称： 一维纤锌矿基异质半导体纳米结构的制备及其光电特性的研究

项目编号： No.51272031

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 一般工业技术

项目作者： 王永钢

作者单位： 北京邮电大学

项目金额： 80万元

中文摘要： 异质半导体纳米结构因具有优良的物理性能及潜在的应用前景而受到人们广泛关注。目前，关于异质纳米结构的定向生长、可控合成以及利用其构建纳米器件一直是人们研究的热点与难点。本项目以一维纤锌矿基半导体纳米结构为研究对象，拟开展利用溶解热合成法制备一维Ag2S、Ag2Se、Cu2S、Cu2Se-纤锌矿异质纳米结构，实现一维纤锌矿异质纳米结构的形貌、尺寸、成分可控合成。同时发展一种微纳米加工技术与介电电泳法结合的新工艺，将单个异质纳米结构组装到纳米电极上。系统表征单个异质纳米结构的光、电特性，研究不同外界条件如温度、光场和电场对其电学和光学性能的影响,揭示单个异质纳米结构的电学输运性能，获得单个异质纳米结构的电输运机制以及外界条件对这些异质结构能带结构与态密度的影响规律。

中文关键词： 异质纳米结构；微结构；半导体；光催化；电化学催化

英文摘要： Heterostructured semiconductor nanostructures have attrcated considerable attention due to their excellent physical properties and promising applications. ?The orientation growth, controlable syntheses and the heterostructure-related nanodevices have been a hot and difficult point up to now.In this proposal, we will use a facile solvothermal method to fabricate one-dimensional Ag2S、Ag2Se、Cu2S、Cu2Se-wurtzite heterostructured nanostructures, and finally realize the controllable synthesis of one-dimensional heterostructures with different morphology, size and composition. Moreover, we will develop a novel technology composed of micro/nanofabrication technique and dielectrophoresis method to assemble a single heterostructure into electrodes with nanogap. The optical and electric properties of a single heterostructure were systematically characterized, and effects of different external conditions including temperature, light field and electrical field on the optical and electrical transport properties will be investigated in detail. These results will illuminate the electrical transport mechanism of a single heterostructured nanostructure and the variation law of the band structure and density of states of the heterostructures affected by the mentioned external conditions.

英文关键词： Heterostructured nanostructures；Microstructure；Semiconductor；Photocatalysis；Electrochemical catalysis