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报道的纳米结构V2VI3薄膜超晶格(SL)结构的杰出结果有力地推动了人们对开发高效新型热电材料的兴趣。因此，项目第一阶段的工作集中在通过综合的方法独立澄清已报道的结果，以更深入地了解这些SL结构的高效率的物理背景。在项目的第二阶段，工作的主要重点是外延V2VI3和外延/纳米合金化的V2VI3/IV-VI混合超晶格薄膜。样品将被沉积在不同的衬底上，并采用在第一阶段被证明很好的组合方法进行联合表征。另一点是新型纳米结构的制备，即具有一维纳米夹杂物的二维纳米层。所有材料的结构和组成都需要通过最先进的技术，特别是电子显微镜，在纳米尺度上进行表征。计划在SPP计划内外开展合作，以加强热电研究的网络联系。通过帮助推断更好和/或新的热电材料的设计作用，综合方法所期望的结果应该得到实际应用。