Thermoelectric properties of Eu- and Na-substituted SnTe  

作　　者：王新科 郭凯 Igor Veremchuk Ulrich Burkhardt 冯贤娟 Juri Grin 赵景泰 

机构地区：[1]Key Laboratory of Transparent Opto-Functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences [2]University of the Chinese Academy of Sciences [3]School of Materials Science and Engineering, Shanghai University [4]Max Planck Institute for Chemical Physics of Solids

出　　处：《Journal of Rare Earths》2015年第11期1175-1181,共7页稀土学报（英文版）

基　　金：supported by Young Eastern Scholar Project of Shanghai Municipal Education Commission(QD2015031)

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′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.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.

关 键 词：SnTe Eu-and Na-substitution hole concentration thermoelectric properties lattice parameter rare earths 

分 类 号：TB34[一般工业技术—材料科学与工程]