梯度带隙异质结光电极制备及其在太阳能电池中的应用研究

项目名称： 梯度带隙异质结光电极制备及其在太阳能电池中的应用研究

项目编号： No.51202081

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： 朱雨富

作者单位： 淮阴工学院

项目金额： 25万元

中文摘要： 新型高性能太阳能电池研究对解决环境污染和能源短缺具有重要的科学意义和实用价值。针对目前量子点敏化太阳能电池中量子点在纳米结构光电极上有效加载困难而导致吸光率低的缺点，本课题提出了采用梯度带隙异质结作为光电极来提高电极对太阳光的吸收：通过化学转化法实现CdS壳层在ZnO纳米线表面的完全覆盖来提高电极对波长短于550nm光谱的吸收；再通过在ZnO/CdS核壳结构的表面吸附CdSe量子点进一步扩大光谱的吸收范围。通过对比研究由不同光电极组装的太阳能电池的性能来探讨影响光电转换效率的物理机制；系统深入研究电池中光子的吸收和散射过程；研究载流子在纳米结构中的输运机制。项目预期将揭示影响电池光电转换效率的物理起源，提出提高电池性能的可行方案。本项目的研究结果将会为设计和制备高性能太阳能电池提供科学依据，具有潜在的经济效益和社会效益。

中文关键词： ZnO纳米结构；太阳能电池；化学合成；光学特性；

英文摘要： Research work on high-performance solar cells has an important scientific significance and practical value to solve the environmental pollution and energy shortages. Considering the low absorbance of the present quantum dot sensitized solar cells caused by the ineffective loading of quantum dots on the surface of nanostructure electrodes, in this project, the heterojunction photoelectrodes with graded-bandgap are suggested to improve the absorption of sunlight: the ZnO nanowire cores totally covered by CdS shells synthesized via a chemical conversion method are used to absorb solar light with wavelengths below 550 nm; To further expand the absorption spectra, CdSe quantum dots will be deposited onto the surface of the synthesized ZnO/CdS core/shell nanostructure arrays. The physical mechanism that could affect the photoelectric conversion efficiency will be explored by comparing the performance of solar cells made with different photoelectrodes. The absorption and scattering process of photons will be studied; carrier transport properties in semiconductor nanostructures will be discussed. The project is expected to reveal the physical origin that affects the photoelectric conversion efficiency and find the possible ways to improve the performance of solar cell. The findings of this project will provide a scienti

英文关键词： ZnO nanostructures；solar cells；chemical synthesis；optical properties；