Thermoelectric properties of Eu- and Na-substituted SnTe

Thermoelectric properties of spark-plasma-sintering prepared bulk materials EuxNay□zSn1–x–y–zTe above room temperature were investigated. The implementation of Eu and Na into the SnTe lattice was monitored by refinement of lattice parameters as well as energy dispersive X-ray spectroscopy（EDXS）. The...

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Bibliographic Details
Published in:Journal of rare earths 2015-11, Vol.33 (11), p.1175-1181
Main Author: 王新科 郭凯 Igor Veremchuk Ulrich Burkhardt 冯贤娟 Juri Grin 赵景泰
Format: Article
Language:English
Subjects:
Carrier density
Carrier mobility
Energy dispersive x-ray spectroscopy
Eu- and Na-substitution
hole concentration
lattice parameter
Lattice parameters
Lattices
Rare earth metals
rare earths
SnTe
thermoelectric properties
Thermoelectricity
放电等离子烧结
晶格参数
欧盟
热电性能
能量色散谱
载流子浓度
载流子迁移率
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Summary:Thermoelectric properties of spark-plasma-sintering prepared bulk materials EuxNay□zSn1–x–y–zTe above room temperature were investigated. The implementation of Eu and Na into the SnTe lattice was monitored by refinement of lattice parameters as well as energy dispersive X-ray spectroscopy（EDXS）. The binary SnTe achieved the highest ZT value of 0.63 at 786 K, and showed a hole concentration of 4.6′10^19 cm^–3 at 300 K. In comparison with pristine SnTe, the samples containing Eu had lower carrier mobility but higher Hall carrier concentration. For Eu- and Na-substituted samples, the increased hole concentration was unfavorable for the improvement of thermoelectric properties.
ISSN:1002-0721
2509-4963
DOI:10.1016/S1002-0721(14)60543-3