期刊
CHEMISTRY OF MATERIALS
卷 29, 期 23, 页码 9954-9963出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.chemmater.7b03300
关键词
-
资金
- Russian Science Foundation [17-13-01033]
- Federal Ministry for Education and Research Fund [TK134]
- Federal Ministry for Education and Research under Sofia Kovalevskaya Award of the Alexander von Humboldt Foundation
- National Science Foundation [CHE-1152441]
- University of Antwerp through BOF Grant [31445]
A new synthetic approach based on chemical transport reactions has been introduced to obtain the Nowotny chimney ladder phase Fe2Ge3 in the form of single crystals and polycrystalline powders. The single crystals possess the stoichiometric composition and the commensurate chimney ladder structure of the Ru2Sn3 type in contrast to the polycrystalline samples that are characterized by a complex microstructure. In compliance with the 18-n electron counting rule formulated for T-E intermetallics, electronic structure calculations reveal a narrow-gap semiconducting behavior of Fe2Ge3 favorable for high thermoelectric performance. Measurements of transport and thermoelectric properties performed on the polycrystalline samples confirm the formation of a narrow band gap of similar to 30 meV and reveal high absolute values of the Seebeck coefficient at elevated temperatures. Low glass-like thermal conductivity is observed in a wide temperature range that might be caused by the underlying complex microstructure.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据