利用协同效应在导电玻璃上生长高比表面积超长单晶TiO2纳米线阵列及制备高效染料敏化太阳电池

项目名称： 利用协同效应在导电玻璃上生长高比表面积超长单晶TiO2纳米线阵列及制备高效染料敏化太阳电池

项目编号： No.51272294

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： 刘勇

作者单位： 中山大学

项目金额： 80万元

中文摘要： 在导电玻璃上直接生长有序单晶TiO2纳米线阵列制备染料敏化太阳电池可以获得更好的电子传输性能并减小复合损失。文献报道的应用这类材料迫切需要解决的难题是：长度太短(2-5 μm)；比表面积小(3-11 m2/g)；所用盐酸破坏基底的导电性。温和条件下在导电玻璃上生长高比表面积、更长的单晶TiO2纳米线阵列是进一步提高电池效率的关键。本课题提出通过含氯的钛前驱体和月桂酸的协同效应在导电玻璃上直接生长高比表面积、超长的单晶TiO2纳米线阵列并制备染料敏化太阳电池。本课题的前期实验已经实现了在导电玻璃上生长10-46 μm，比表面积95 m2/g的单晶TiO2纳米线，月桂酸是有机弱酸，制备条件温和。我们将进一步研究纳米线与导电基底的界面结合问题；调控长度、长径比和孔径分布；实现低温制备降低成本及探明生长动力学机理，并制备10-100 μm的单晶纳米线电池，预期制备的电池效率达到7-11%。

中文关键词： 二氧化钛；纳米线阵列；染料敏化；太阳电池；一维纳米结构

英文摘要： Vertically aligned single crystal TiO2 nanowire array grown directly on transparent conductive oxide glass is considered as a kind of very promising nanostructure for dye-sensitized solar cells (DSCs) because it ensures rapid collection of charge carriers generated throughout the cells. However, there are at least three major challenges in the fabrication of such nanowires on conductive glass for highly efficient DSCs. The first challenge is that, the most commonly reported length of nanowires on conductive glass is only 2-5 μm. The second challenge is that the specific surface area of the single crystal nanowires is very low (3-11 m2/g). Thirdly, conductive glass will be destroyed by hydrochloric acid during hydrothermal conditions, which results in a decrease of the cell performance. Therefore, we will develop a mild solvothermal approach that involves the synergistic interaction of self-supplied chloride ion from titanium precursor and lauric acid for synthesizing single crystal TiO2 nanowire arrays on conductive glass, instead of participation of strong acids, to overcome the challenges mentioned above. The direct growth of TiO2 nanowire arrays with length up to tens of micrometers and high surface area would be desirable for highly efficient solar cells. The initial results show that single-crystal TiO2 nan

英文关键词： titania；nanowire arrays；dye-sensitized；solar cell；one-dimensional nanosturcture