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Journal of Advanced Ceramics 2020, 9(4): 424-431 https://doi.org/10.1007/s40145-020-0382-9
Research Article | Open Access | Issue | Published: 15 May 2020

Enhanced thermoelectric properties of hydrothermally synthesized n-type Se&Lu-codoped Bi2Te3

Show Author's Information Xiaolei SHIa,†,  Xin AIb,†,  Qihao ZHANGc,d( ),  Xiaofang LUa,  Shijia GUe,  Li SUa,  Lianjun WANGa,f( ),  Wan JIANGa,e
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
College of Information Science and Technology, Donghua University, Shanghai 201620, China
State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
Institute of Functional Materials, Donghua University, Shanghai 201620, China
Engineering Research Center of Advanced Glasses Manufacturing Technology, Ministry of Education, Shanghai 201620, China

† Xiaolei Shi and Xin Ai contributed equally to this work.

Keywords:
thermoelectric material, n-type, bismuth telluride, hydrothermal synthesis, co-doping
Cite this article:
SHI X, AI X, ZHANG Q, et al. Enhanced thermoelectric properties of hydrothermally synthesized n-type Se&Lu-codoped Bi2Te3. Journal of Advanced Ceramics, 2020, 9(4): 424-431. https://doi.org/10.1007/s40145-020-0382-9
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Abstract Full text Electronic supplementary material About this article

N-type Se&Lu-codoped Bi2Te3 nanopowders were prepared by hydrothermal method and sintered by spark plasma sintering technology to form dense samples. By further doping Se element into Lu-doped Bi2Te3 samples, the thickness of the nanosheets has the tendency to become thinner. The electrical conductivity of Lu0.1Bi1.9Te3-xSex material is reduced with the increasing Se content due to the reduced carrier concentration, while the Seeback coefficient values are enhanced. The lattice thermal conductivity of the Lu0.1Bi1.9Te3-xSex is greatly reduced due to the introduced point defects and atomic mass fluctuation. Finally, the Lu0.1Bi1.9Te2.7Se0.3 sample obtained a maximum ZT value of 0.85 at 420 K. This study provides a low-cost and simple low-temperature method to mass production of Se&Lu-codoped Bi2Te3 with high thermoelectric performance for practical applications.


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About this article

Enhanced thermoelectric properties of hydrothermally synthesized n-type Se&Lu-codoped Bi2Te3

Show Author's information Xiaolei SHIa,†, Xin AIb,†, Qihao ZHANGc,d( ), Xiaofang LUa, Shijia GUe, Li SUa, Lianjun WANGa,f( ), Wan JIANGa,e
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
College of Information Science and Technology, Donghua University, Shanghai 201620, China
State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
Institute of Functional Materials, Donghua University, Shanghai 201620, China
Engineering Research Center of Advanced Glasses Manufacturing Technology, Ministry of Education, Shanghai 201620, China

† Xiaolei Shi and Xin Ai contributed equally to this work.

Abstract

N-type Se&Lu-codoped Bi2Te3 nanopowders were prepared by hydrothermal method and sintered by spark plasma sintering technology to form dense samples. By further doping Se element into Lu-doped Bi2Te3 samples, the thickness of the nanosheets has the tendency to become thinner. The electrical conductivity of Lu0.1Bi1.9Te3-xSex material is reduced with the increasing Se content due to the reduced carrier concentration, while the Seeback coefficient values are enhanced. The lattice thermal conductivity of the Lu0.1Bi1.9Te3-xSex is greatly reduced due to the introduced point defects and atomic mass fluctuation. Finally, the Lu0.1Bi1.9Te2.7Se0.3 sample obtained a maximum ZT value of 0.85 at 420 K. This study provides a low-cost and simple low-temperature method to mass production of Se&Lu-codoped Bi2Te3 with high thermoelectric performance for practical applications.

Keywords: thermoelectric material, n-type, bismuth telluride, hydrothermal synthesis, co-doping

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Publication history

Received: 20 January 2020
Revised: 10 April 2020
Accepted: 22 April 2020
Published: 15 May 2020
Issue date: August 2020

Copyright

© The Author(s) 2020

Acknowledgements

This work was funded by the Fundamental Research Funds for the Central Universities (No. 2232020A-02), National Natural Science Foundation of China (Nos. 51774096, 51871053, 51902333), Shanghai Committee of Science and Technology (18JC1411200), Program for Innovative Research Team in University of Ministry of Education of China (IRT_16R13). Q. Zhang acknowledges financial support sponsored by Shanghai Saiiling Program (19YF1454000) and Key Research Program of Frontier Sciences, CAS (Grant No. ZDBS-LY-JSC037).

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