Multiple nanostructures in high performance Cu2S0.5Te0.5thermoelectric materials
Zhu, Chenxi1,2,3; He, Ying1; Lu, Ping1,2; Fu, Zhengqian1,2; Xu, Fangfang1,2; Yao, Heliang2; Zhang, Linlin2; Shi, Xun1; Chen, Lidong1
Source PublicationCeramics International
AbstractCu2(S,Te) solid solution material has shown excellent thermoelectric performance with a maximum zT value up to 2.1. Previous work has observed specific mosaic nanocrystals in this solid solution which is considered to be responsible for its ultra-low thermal conductivity. In the present study, we performed in-depth microstructural examinations by transmission electron microscopy and revealed additional multiform nanostructures in Cu2S0.5Te0.5solid solution. Apart from widely existed mosaic nanocrystals, nano-domains of ordered structure, nanoscale periodic antiphase domains, stacking faults and polytype have been observed. Formation of such abundant nanoscale substructures could be related to the large mismatch in atomic size between S and Te solute elements. These nanostructures are all coherently embedded in the matrix lattice. Thereafter, continuous carrier transportation is still guaranteed while in the meantime phonon scattering is enhanced by such high density of structural imperfection. Thus, solid solution strategy in Cu2S0.5Te0.5matches well with the phonon-glass electron-crystal concept for high performance thermoelectric materials. © 2017 Elsevier Ltd and Techna Group S.r.l.
EI Accession Number20171203476841
EI KeywordsSulfur compounds
EI Classification Number615.4 Thermoelectric Energy - 701.1 Electricity: Basic Concepts and Phenomena - 741.3 Optical Devices and Systems - 761 Nanotechnology - 933 Solid State Physics - 933.1.1 Crystal Lattice
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Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai; 200050, China;
2.Shanghai Institute for Materials Genome, Shanghai, China;
3.University of Chinese Academy of Sciences, Beijing; 100049, China
Recommended Citation
GB/T 7714
Zhu, Chenxi,He, Ying,Lu, Ping,et al. Multiple nanostructures in high performance Cu2S0.5Te0.5thermoelectric materials[J]. Ceramics International,2017,43(10):7866-7869.
APA Zhu, Chenxi.,He, Ying.,Lu, Ping.,Fu, Zhengqian.,Xu, Fangfang.,...&Chen, Lidong.(2017).Multiple nanostructures in high performance Cu2S0.5Te0.5thermoelectric materials.Ceramics International,43(10),7866-7869.
MLA Zhu, Chenxi,et al."Multiple nanostructures in high performance Cu2S0.5Te0.5thermoelectric materials".Ceramics International 43.10(2017):7866-7869.
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