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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 PublicationRSC ADVANCES
ISSN2046-2069
Volume9Issue:14Pages:7826
SubtypeArticle
AbstractCopper-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.
DOI10.1039/c9ra00077a
Language英语
WOS Research AreaChemistry
PublisherROYAL SOC CHEMISTRY
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/27419
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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