期刊
FUNCTIONAL MATERIALS LETTERS
卷 7, 期 5, 页码 -出版社
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S1793604714500519
关键词
Thermoelectric; electrical resistivity; pressure; Bi2Te3-xSex
资金
- National Science Foundation of China [51171070, 51071074]
- Development Program of Science and Technology of Jilin City, China [2013625001]
- NCET
The purpose of this research is to study the effect of Se doping content on the improvement in thermoelectric properties of Bi2Te3-xSex bulk materials produced by high-pressure role. The Bi2Te3-xSex bulk materials can be successfully synthesized within 30 min due to high-pressure role, which significantly shortened the synthesis time. The typical textures of the reaction products exhibit abundant cracked crystal planes and special layer structures with increasing Se content, which can coordinate electrical and thermal transport in the Bi2Te3-xSex samples to achieve an optimal thermoelectric performance. As a result, a Bi2Te2.73Se0.27 bulk material obtained a maximum ZT value of 1.03 at 344 K. These results suggest that the low Se doping content with high-pressure can improve the figure of merit of Bi2Te3-xSex materials.
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