ZnO复合Bi-Te热电材料光阳极的电输运特性及应用研究

项目名称： ZnO复合Bi-Te热电材料光阳极的电输运特性及应用研究

项目编号： No.11304405

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 数理科学和化学

项目作者： 吴芳

作者单位： 重庆大学

项目金额： 30万元

中文摘要： 近年来，研究人员发现染料敏化太阳能电池(DSCs)工作中的温升造成了电池效率和寿命的降低，而造成温升的主要原因是太阳光谱中的近红外光不能被光伏转换所利用。为此，本项目将具有高电子迁移率的ZnO与具有优良室温热电性能的Bi-Te合金直接复合制备光阳极，以有效利用光产生的热，进一步提高DSCs的效率。本项目从理论上模拟ZnO/Bi-Te的界面特性，优化设计ZnO 与Bi-Te的复合结构，并在此基础上有针对性的进行实验研究，制备出不同成分、不同浓度、不同结构的复合光阳极和复合DSCs；重点研究ZnO的微观结构对染料吸附率和电输运特性的影响，ZnO/Bi-Te界面电子输运特性，以获得优化的ZnO/Bi-Te复合光阳极和高效的复合DSCs。因此，本项目在提高ZnO基DSCs效率, 降低混合集能器结构复杂性方面具有重要的科学研究价值，在新能源利用领域具有广阔的应用前景。

中文关键词： 染料敏化太阳能电池；ZnO；热电效应；复合光阳极；电输运

英文摘要： In recent years, researchers found that the temperature rise of Dye-sensitized Solar Cells(DSCs) in the work lead to the decreases of conversion efficiency and life, the primary reason is that the near-infrared light can't be utilized by photoelectric conversion. In order to effectively use the heat generated by the light, to further improve the conversion efficiency of the photovoltaic devices, the main way in this project is to incorporate Bi-Te with ZnO directly, and use the composite as a photoanode, because it's well known that ZnO is a material with high electron mobility and Bi-Te is an alloy with good thermoelectrical performance at Room Temperature. In this project, researchers plan to simulate the interface property of ZnO/Bi-Te and optimize the design of composite structure in theory. Based on the theoretical analysis, composite photoanodes and DSCs with different components, different concentrations, and different structures would be prepared by experimental study. The main emphasis of this project is to study the influence of ZnO microstructure on dye adsorption and electron transport, the electron transport property on the ZnO/Bi-Te interface, and obtain optimal ZnO/Bi-Te composite photoanodes and efficient composite DSCs. So the project has an important scientific value for the efficiency improv

英文关键词： Dye-sensitized solar cell；Zinc Oxide；Thermoelectric effect；Composite photoanode；Electron transport