Quasi-two-dimensional GeSbTe compounds as promising thermoelectric materials with anisotropic transport properties

doi:10.1063/1.5083863

SIC OpenIR

	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 Publication	APPLIED PHYSICS LETTERS
ISSN	0003-6951
Volume	114 Issue:5
Subtype	Article
Abstract	Pseudo-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.
DOI	10.1063/1.5083863
Language	英语
WOS Research Area	Physics
Publisher	AMER INST PHYSICS
Citation statistics	Cited Times:4[WOS] [WOS Record] [Related Records in WOS]
Document Type	期刊论文
Identifier	http://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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