Communication

Ultrahigh Thermoelectric Performance in Mosaic Crystals

State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050 China

CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050 China

University of Chinese Academy of Sciences, Beijing, 100049 China

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Ping Lu

State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050 China

University of Chinese Academy of Sciences, Beijing, 100049 China

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Xun Shi

Corresponding Author

State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050 China

CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050 China

E‐mail: xshi@mail.sic.ac.cn, ffxu@mail.sic.ac.cn, cld@mail.sic.ac.cn Search for more papers by this author

Fangfang Xu

Corresponding Author

State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050 China

E‐mail: xshi@mail.sic.ac.cn, ffxu@mail.sic.ac.cn, cld@mail.sic.ac.cn Search for more papers by this author

Tiansong Zhang

CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050 China

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Gerald Jeffrey Snyder

Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208 USA

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Ctirad Uher

Department of Physics, University of Michigan, Ann Arbor, MI, 48109 USA

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Lidong Chen

Corresponding Author

State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050 China

CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050 China

Shanghai Institute of Materials, Genome, Shanghai, 200444 China

E‐mail: xshi@mail.sic.ac.cn, ffxu@mail.sic.ac.cn, cld@mail.sic.ac.cn Search for more papers by this author

Ying He

State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050 China

CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050 China

University of Chinese Academy of Sciences, Beijing, 100049 China

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Ping Lu

State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050 China

University of Chinese Academy of Sciences, Beijing, 100049 China

Search for more papers by this author

Xun Shi

Corresponding Author

State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050 China

CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050 China

E‐mail: xshi@mail.sic.ac.cn, ffxu@mail.sic.ac.cn, cld@mail.sic.ac.cn Search for more papers by this author

Fangfang Xu

Corresponding Author

State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050 China

E‐mail: xshi@mail.sic.ac.cn, ffxu@mail.sic.ac.cn, cld@mail.sic.ac.cn Search for more papers by this author

Tiansong Zhang

CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050 China

Search for more papers by this author

Gerald Jeffrey Snyder

Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208 USA

Search for more papers by this author

Ctirad Uher

Department of Physics, University of Michigan, Ann Arbor, MI, 48109 USA

Search for more papers by this author

Lidong Chen

Corresponding Author

State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050 China

CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050 China

Shanghai Institute of Materials, Genome, Shanghai, 200444 China

E‐mail: xshi@mail.sic.ac.cn, ffxu@mail.sic.ac.cn, cld@mail.sic.ac.cn Search for more papers by this author

First published: 12 May 2015

https://doi.org/10.1002/adma.201501030

Citations: 115

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Abstract

Successful research strategies to enhance the dimensionless figure of merit zT above 2 rely on either bulk nanomaterials or on single crystals. A new physical mechanism of nanoscale mosaicity is shown that goes beyond the approaches in single crystals or conventional nanomaterials. A zT value of 2.1 at 1000 K in bulk nanomaterials is achieved.