基于量子点染料共敏化分等级多孔TiO2薄膜的光电性能研究

项目名称： 基于量子点染料共敏化分等级多孔TiO2薄膜的光电性能研究

项目编号： No.61274129

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 无线电电子学、电信技术

项目作者： 王苹

作者单位： 武汉理工大学

项目金额： 84万元

中文摘要： 染料敏化纳晶TiO2太阳能电池具有解决能源短缺的潜在能力而备受关注。在大力提高光电转换效率的前提下，增强TiO2薄膜电极对太阳光谱的光吸收性能是首要解决的关键问题之一。本项目拟以研究一种量子点和染料共敏化的分等级多孔结构薄膜材料为基础，构建高效纳晶TiO2太阳能电池体系。首先，通过TiO2的自组装过程在导电玻璃表面制备分等级多孔TiO2薄膜，以无机量子点和有机染料为共敏化剂，构筑基于量子点和染料共敏化的分等级多孔TiO2薄膜；研究薄膜的分等级多孔结构对无机量子点负载和有机染料吸附的影响(分布、均匀性、含量、界面相互作用等)，揭示分等级多孔结构、无机量子点和有机染料分子对增强可见光吸收的协同作用机理，提高TiO2薄膜电极的光电转换效率。本项目的实施与完成可为半导体光电转换材料的设计提供新的思路，为高效TiO2光阳极的研究和应用提供理论依据。

中文关键词： 分等级多孔结构；双光散射层；CdS量子点；共敏化；光电转化效率

英文摘要： Dye-sensitized nanocrystalline TiO2 solar cell has been proved to be an effective and promising strategy for the resolution of energy shortage. To improve the photoelectric conversion efficiency, it is very important to enhance the light-absorption performance of TiO2 thin film in the solar spectrum. In this project, we intends to investigate the improved light-absorption and photoelectric conversion efficiency of solar cell by the combination of hiararchical porous materials and cosensetization of quantum dots and dyes. First, the hierarchical porous TiO2 film is self-assembled on the surface of fluorine-doped tin oxide (FTO) coated glass, and the quantum dots and dyes as the sensitive sensors are coated on the surface of porous films to prepare hierarchical porous TiO2 solar cell. The effect of hierarchical porous structure on the loading of quantum dots and adsorption of dyes (including the dispersion, homogeneous, amount and their interaction) is investigated, with the aim of revealing the synergistic effect of the hierarchical porous structure, quantum dots and dyes for the enhanced absorption of visible light and improved photoelectric conversion performance of TiO2 thin film. The implementation of this project may provide new insights for the design and development of new and high-efficiency photoelectric

英文关键词： hierarchically mesoporous；double light-scattering layer；CdS quantum dots；cosensetization；photoelectric conversion performance