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

Journal of Advanced Ceramics

Xin Ai¹  Shijia Gu²  Lianjun Wang³  Xiaofang Lu³  Xiaolei Shi³  Li Su³  Wan Jiang³  Qihao Zhang⁴ 

[1] College of Information Science and Technology, Donghua University;Institute of Functional Materials, Donghua University;State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University;State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences;

关键词: thermoelectric material;    n-type;    bismuth telluride;    hydrothermal synthesis;    co-doping;   

DOI  :  10.1007/s40145-020-0382-9

来源: DOAJ

【 摘 要 】

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−x Se x 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−x Se x 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.

【 授权许可】

Unknown