Thermoelectric properties of n-type Cu4Sn7S16-based compounds

doi:10.1039/c9ra00077a

SIC OpenIR

	Thermoelectric properties of n-type Cu4Sn7S16-based compounds
	Deng, Tingting; Wei, Tian-Ran; Song, Qingfeng; Xu, Qing; Ren, Dudi; Qiu, Pengfei; Shi, Xun; Chen, Lidong
	2019
Source Publication	RSC ADVANCES
ISSN	2046-2069
Volume	9 Issue:14 Pages:7826
Subtype	Article
Abstract	Copper-based chalcogenides have ultralow thermal conductivity and ultrahigh thermoelectric performance, but most of them are p-type semiconductors. It is urgent to develop n-type counterparts for high efficiency thermoelectric modules based on these copper based-chalcogenides. Cu4Sn7S16 is an intrinsically n-type semiconductor with complex crystal structure and low thermal conductivity. However, its thermoelectric properties have not been well studied when compared to the well-known n-type CuFeS2. In this work, high-quality Cu4Sn7S16-based compounds are fabricated and their thermoelectric properties are systematically studied. Using Ag and Sb as dopants, the carrier concentration is tuned over a wide range. The electrical transport properties can be well described by the single parabolic band model with carrier acoustic phonons scattering. It is revealed that Cu4Sn7S16 exhibits a low effective mass and relatively high mobility. The thermal conductivity is lower than 0.8W m(-1) K-1 from 300 to 700 K and shows a weak dependence on temperature. A maximum zT of 0.27 is obtained in Cu3.97Ag0.03Sn7S16 at 700 K. Further enhancement of thermoelectric performance is possible when a more efficient n-type dopant is used.
DOI	10.1039/c9ra00077a
Language	英语
WOS Research Area	Chemistry
Publisher	ROYAL SOC CHEMISTRY
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/331005/27419
Collection	中国科学院上海硅酸盐研究所
Recommended Citation GB/T 7714	Deng, Tingting,Wei, Tian-Ran,Song, Qingfeng,et al. Thermoelectric properties of n-type Cu4Sn7S16-based compounds[J]. RSC ADVANCES,2019,9(14):7826.
APA	Deng, Tingting.,Wei, Tian-Ran.,Song, Qingfeng.,Xu, Qing.,Ren, Dudi.,...&Chen, Lidong.(2019).Thermoelectric properties of n-type Cu4Sn7S16-based compounds.RSC ADVANCES,9(14),7826.
MLA	Deng, Tingting,et al."Thermoelectric properties of n-type Cu4Sn7S16-based compounds".RSC ADVANCES 9.14(2019):7826.

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