Nanostructure, thermoelectric properties and transport theory of V2VI3 and V2VI3/IV-VI based superlatices

V2VI3和V2VI3/IV-VI基超晶格的纳米结构、热电性质和输运理论

• 批准号: 123084243
• 负责人: Professor Dr. Wolfgang Bensch
• 金额: --
• 依托单位: Fraunhofer-Institut für Physikalische Messtechnik (IPM)
• 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/123084243?language=en
• 关键词: Nanostructure; thermoelectric; properties; transport; theory

The outstanding results reported by Venkatasubramanian1 for nanostructured V2VI3 - based thin film superlattice (SL) structures strongly fueled and renewed the interest in the development of efficient novel thermoelectric materials. Thus, the work in the first period of the project was focused on an independent clarification of the reported results by a comprehensive approach in order to gain more insight into the physical background of the high efficiency of those SL structures.In the second period of the project, the main focus of the work is set to epitaxial V2VI3 and epitaxial/nanoalloyed V2VI3 / IV-VI mixed superlattice thin films with enhanced thermal stability. The samples will be deposited on different substrates and jointly characterized with a combined approach that has proven well in the first period. Another point will be the fabrication of novel types of nanostructures, i.e. twodimensional nanoscale layers with one-dimensional nanoinclusions. The structure and composition of all materials need to be characterized at the nanoscale by state-of-the-art techniques, with particular emphasis on electron microscopy. Cooperations within and outside the SPP program are planned to enhance the networking of thermoelectric research. The results expected by the comprehensive approach should find practical application by helping to deduce design roles for better and/or new thermoelectric materials.

Venkatasubramanian1报告的纳米结构V2VI3薄膜超晶体超晶体（SL）结构的出色结果强烈加油，并重新引起了人们对有效新型热电学材料发展的兴趣。因此，该项目的第一阶段的工作重点是通过一种全面的方法独立阐明报告结果的独立澄清，以便更深入地了解这些SL结构的高效率的物理背景。项目，这项工作的主要重点设置为外观上的V2VI3和外延 /纳米合成的V2VI3 / IV-VI混合级别超级晶状体薄膜，具有增强的热稳定性。样品将沉积在不同的底物上，并以在第一个时期证明很好的合并方法共同表征。另一点将是制造新型纳米结构类型的，即具有一维纳米颈的二维纳米级层。所有材料的结构和组成都需要通过最新技术在纳米级表征，并特别强调电子显微镜。计划在SPP计划内外进行合作，以增强热电研究的网络。全面方法预期的结果应通过帮助推断出设计角色的更好和/或新的热电材料来找到实际应用。