Thermoelectric properties of Eu- and Na-substituted SnTe
来源期刊：Journal of Rare Earths2015年第11期
论文作者：王新科 郭凯 Igor Veremchuk Ulrich Burkhardt 冯贤娟 Juri Grin 赵景泰
文章页码：1175 - 1181
摘 要：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′1019 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.
王新科1,2，郭凯3，Igor Veremchuk4，Ulrich Burkhardt4，冯贤娟4，Juri Grin4，赵景泰3
1. Key Laboratory of Transparent Opto-Functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences2. University of the Chinese Academy of Sciences3. School of Materials Science and Engineering, Shanghai University4. Max Planck Institute for Chemical Physics of Solids
摘 要：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′1019 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.
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