多枝分级TiO2纳米线阵列的制备及其在量子点敏化太阳能电池中的应用研究

项目名称： 多枝分级TiO2纳米线阵列的制备及其在量子点敏化太阳能电池中的应用研究

项目编号： No.51202025

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 无机非金属材料学科

项目作者： 王玲玲

作者单位： 东北师范大学

项目金额： 25万元

中文摘要： 具备大活性表面积、高电荷分离效率和优异的电荷输运性质的多枝分级TiO2纳米线阵列在光电化学太阳能转化与利用领域有重要应用。本研究就是要利用简单的液相化学合成方法制备多枝分级的TiO2纳米线阵列，并在纳米线表面组装与TiO2纳米线能带匹配的半导体量子点光吸收层，构建量子点敏化太阳能电池。利用一维纳米线多枝分级结构增大材料对光的吸收；利用一维纳米线结构独特的导电通路及TiO2纳米线与半导体量子点间II型异质结的构建调制电荷的分离与输运。研究多枝分级TiO2纳米线阵列的制备方法及这种复杂分级结构、异质界面的电荷传输、半导体量子点光吸收层厚度和组成等对太阳能电池性能的影响。制备具有高光电转换效率的量子点敏化太阳能电池材料。

中文关键词： 二氧化钛；分级结构光阳极；光电化学太阳能电池；；

英文摘要： The multi-branched hierarchical TiO2 nanowire arrays will have important application in the field of photoelectrochemical solar cell since its large active surface area, high charge separation efficiency and excellent charge transport properties. This study is to use a simple wet chemical synthesis method to prepare a multi-branched hierarchical TiO2 nanowire array, and then assemble semiconductor quantum dots on the surface of nanowires to serve as light absorption layer in the quantum dot-sensitized solar cell. In this system, we want to increase the light adsorption by the multi-branched hierarchial configurations of TiO2 nanowire array, and modulate the charge separation and transport by nanowires combine with the II-type heterojunction between TiO2 and semiconductor quantum dots, since the II-type heterojunction will promote charge separation and the one-dimensional crystalline nanostructure will provide a direct conduction pathway for the rapid transport of photogenerated electrons. The preparation method of multi-branched hierarchical TiO2 nanowire array will be researched. And the effects of this complex hierarchical strcuture, the charge transfer of the heterojunction interface, and the thickness and composition of the semiconductor quantum dots light absorption layer for the performance of the solar ce

英文关键词： TiO2；Hierarchical structure photoanode；Photoelectrochemical solar cell；；