Thermoelectric properties of laterally nanostructured ZnO/ZnS thin films: theory and experiment

横向纳米结构 ZnO/ZnS 薄膜的热电性能：理论与实验

• 批准号: 120339796
• 负责人: Professor Dr. Christian Heiliger
• 金额: --
• 依托单位: Institut für Theoretische Physik
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2009
• 资助国家: 德国
• 起止时间: 2008-12-31 至 2017-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/120339796?language=en
• 关键词: Thermoelectric; properties; laterally; nanostructured; ZnO

The main aim of the project is to complete the development of a multiscale model for describing the thermoelectric properties of nanostructured materials. The intension is to obtain a full understanding from the microscopic to the macroscopic scale relating structural, electronic and vibrational properties of the samples to their macroscopic transport coefficients, thermal conductivity κ, electric conductivity σ, and Seebeck coefficient S. The emphasis of the experimental work lies on obtaining information about structure, electronic and vibrational states as well as transport coefficients on the microscopic scale by employing different non-invasive scanning probe techniques in addition to macroscopic measurements. The theoretical emphasis lies on bridging the gap between ballistic transport and diffusive transport. The theoretical model and its limitations will be tested rigorously by studying a series of physical problems addressing major issues of nanostructured materials, i.e. phonon scattering on different length scales, and atomic diffusion across interfaces, and percolation effects. For the testing of the model specifically designed laterally nanostructured samples based on the ZnO-ZnS semiconductor system will be fabricated in two types of configurations I and II allowing one to determine all lateral thermoelectric transport coefficients.

该项目的主要目的是完成描述纳米结构材料热电性质的多尺度模型的开发，其目的是从微观到宏观尺度全面了解样品的结构、电子和振动性质。其宏观输运系数、热导率κ、电导率σ和塞贝克系数S。实验工作的重点在于通过采用不同的方法获得微观尺度上的结构、电子和振动状态以及输运系数信息。除了宏观测量之外，理论重点还在于弥合弹道输运和扩散输运之间的差距，通过研究解决纳米结构材料主要问题的一系列物理问题来严格测试。 ，即不同长度尺度上的声子散射、界面上的原子扩散以及渗流效应，将基于 ZnO-ZnS 半导体系统专门设计的横向纳米结构样品进行测试。以两种类型的配置 I 和 II 制造，允许确定所有横向热电传输系数。