用于光阳极散射层的TiO2片层结构的可控合成及光电特性

项目名称： 用于光阳极散射层的TiO2片层结构的可控合成及光电特性

项目编号： No.51302047

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 一般工业技术

项目作者： 齐立红

作者单位： 哈尔滨工程大学

项目金额： 25万元

中文摘要： 高性能的光阳极散射层不仅要求具有大的比表面积以利于染料的吸附，还要求具有适合的微纳结构以利于光散射和光生电子的传输。但是，通常制备的散射层不能同时满足这些要求。本课题拟在课题组前期完成的二维石墨烯及一维碳纳米管基TiO2复合体的基础上，采用模板法制备大比表面积、不同微结构的二维TiO2片散射层材料，通过控制模板（二维石墨烯及其复合碳材料结构）的组成实现不同微结构（无孔、零维孔和一维孔结构）TiO2片的可控合成。采用类丝网印刷的方法构筑光阳极散射层，通过比较不同形貌、尺寸和比表面积的光阳极散射层的光电转换效率，系统研究其对光的散射（反射）作用，集成运用电化学阻抗和强度调节光电压定量的研究二维TiO2片光阳极散射层与电解液的界面传输电阻、电子传输寿命和电子扩散距离，揭示光阳极散射层-电解液界面电阻对光电效率的影响规律，探索构筑高光电转化效率的二维TiO2片层光阳极散射层的新途径。

中文关键词： 染料敏化太阳能电池；散射层；纳米管阵列；电子传输速率；吸附量

英文摘要： The photoelectrode scattering layer of dye-sensitized solar cells (DSSCs) need not only possess the large surface area for the more amount of dye loading, but also possess the moderate micirostructure for the photogenerated electron transfer. However, these factors are often incompatible with one another. This proposal plans to fabricate the scattering layer materials of two-dimensional TiO2 plates with large surface area and different microstructure(non porous structure, zero-dimensional porous structure and one-dimensional porous structure) via template method, which is based on the previous obtained two-dimensional graphene (one-dimensional carbon nanotube) and their composite. This different microstructure of TiO2 plates could be controlled by using different template composite structure. Then, the photoelectrode scattering layer will be fabricated by quasi-screen printing. Comparing with the different photoelectrical conversion efficiency of DSSCs with the different TiO2 plate scattering layer, the light scattering (reflection) effect will be systematical researched. Furthermore, the interfacial charge transfer resistance between two-dimensional TiO2 plate scattering layer and redox shuttle, electron transport time and electron diffusion length will be studied by using electrochemical impedance spectra, int

英文关键词： dye-sensitized solar cells；scattering layer；nanotube array；electron transfer；adsorption amount