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Quasi-two-dimensional GeSbTe compounds as promising thermoelectric materials with anisotropic transport properties
Wei, Tian-Ran; Hu, Ping; Chen, Hongyi; Zhao, Kunpeng; Qiu, Pengfei; Shi, Xun; Chen, Lidong
2019-02-04
Source PublicationAPPLIED PHYSICS LETTERS
ISSN0003-6951
Volume114Issue:5
SubtypeArticle
AbstractPseudo-binary GeSbTe alloys, best known as phase-change materials, are quasi-two-dimensional semiconductors in their stable trigonal phases with high electrical conductivity and low thermal conductivity, but their thermoelectric properties have not been systematically investigated. Here, in this letter, we prepared polycrystalline Ge2Sb2Te5, GeSb2Te4, and GeSb4Te7 bulk materials and studied the thermoelectric transport properties. Large anisotropy in Seebeck coefficient as well as in electrical conductivity is observed, which is not commonly reported in polycrystalline thermoelectric materials. Combining experimental study and theoretical calculations, one can find that this phenomenon is attributed to the asymmetry of a material's band structure. Maximal zT values of 0.46-0.60 are achieved at 750 K, indicating that GeSbTe-based compounds are promising thermoelectric materials for mid-temperature applications. Published under license by AIP Publishing.
DOI10.1063/1.5083863
Language英语
WOS Research AreaPhysics
PublisherAMER INST PHYSICS
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/27342
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Wei, Tian-Ran,Hu, Ping,Chen, Hongyi,et al. Quasi-two-dimensional GeSbTe compounds as promising thermoelectric materials with anisotropic transport properties[J]. APPLIED PHYSICS LETTERS,2019,114(5).
APA Wei, Tian-Ran.,Hu, Ping.,Chen, Hongyi.,Zhao, Kunpeng.,Qiu, Pengfei.,...&Chen, Lidong.(2019).Quasi-two-dimensional GeSbTe compounds as promising thermoelectric materials with anisotropic transport properties.APPLIED PHYSICS LETTERS,114(5).
MLA Wei, Tian-Ran,et al."Quasi-two-dimensional GeSbTe compounds as promising thermoelectric materials with anisotropic transport properties".APPLIED PHYSICS LETTERS 114.5(2019).
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