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Enhancing thermoelectric properties of Cu1.8+xSe compounds

Published online by Cambridge University Press:  13 May 2014

Liang Zou ,
Bo-Ping Zhang ,
Zhen-Hua Ge  and
Li-Juan Zhang
Liang Zou
Affiliation:
Beijing Key Lab of New Energy Materials and Technology, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
Bo-Ping Zhang*
Affiliation:
Beijing Key Lab of New Energy Materials and Technology, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
Zhen-Hua Ge
Affiliation:
Beijing Key Lab of New Energy Materials and Technology, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
Li-Juan Zhang*
Affiliation:
Beijing Key Lab of New Energy Materials and Technology, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
*
a)Address all correspondence to this author. e-mail: bpzhang@ustb.edu.cn
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Abstract

P-type Cu1.8+xSe (x = 0, 0.16, 0.20) compounds were synthesized by mechanical alloying and spark plasma sintering technique. A 100% enhancement of the Seebeck coefficient was achieved in the whole temperature interval for x = 0.16 and x = 0.20 bulks compared with that of the x = 0 bulk. The thermal conductivity was all below 1.6 W m−1 K−1 in the whole temperature interval for x = 0.16 and x = 0.20 bulks, showing a pronounced reduction compared with that of the x = 0 bulk. The lowest thermal conductivity 0.69 W m−1 K−1 was achieved in the x = 0.16 sample at 773 K, whereby a maximum ZT value of 1.23 was obtained, revealing that optimizing Cu content in Cu1.8+xSe system is an effective method to improve the thermoelectric (TE) merit and indicating a great potential for TE application along with their nontoxicity and low cost.

Keywords

alloythermoelectricphase transformation
Type
Articles
Information
Journal of Materials Research , Volume 29 , Issue 9 , 14 May 2014 , pp. 1047 - 1053
Copyright
Copyright © Materials Research Society 2014 

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References

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