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| Type |
Poster Presentation |
| Area |
Material Chemistry |
| Room No. |
Exhibition Hall 2 |
| Time |
4월 19일 (금요일) 11:00~12:30 |
| Code |
MAT.P-465 |
| Subject |
Synthesis of heavily Cu-doped Bi2Te3 nanoparticles and their thermoelectric properties |
| Authors |
Juhee An, Mi-Kyung Han1,*, Sung-Jin Kim2,*
Chemistry and Nano Science, Ewha Womans University, Korea
1Division of Chemistry and Nano Science, Ewha Womans University, Korea
2Department of Chemistry, Ewha Womans University, Korea
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| Abstract |
The thermoelectric (TE) materials are able to convert heat into electricity and have drawn increasing attention in several years due to the need for alternative energy of fossil fuels. The performance of thermoelectric materials can be evaluated by figure of merit ZT, which is defined as σS2T/κ.
Bi2Te3 and its derivative compounds are the most of studied thermoelectric materials and are widely employed in thermoelectric (TE) applications at room temperature. It is known that thermoelectric materials of nanostructure increase ZT relative to that of the bulk materials due to reduce the thermal conductivity without reducing the power factor.
In this study, Cu-doped Bi2Te3 nanoparticle was synthesized by solution state reaction. The synthesized Cu-doped Bi2Te3 nanoparticles were consolidated by spark-plasma sintering into bulk pellets, and the thermoelectric properties (Seebeck coefficient and thermal conductivity) of these pellets were measured. Cu-doping in Bi2Te3 shows enhanced the Seebeck coefficient due to a decrease in carrier concentration, thus the power factors increased compared with that of the un-doped sample. As a result, Cu-doped Bi2Te3 sample with 15.6 at% Cu exhibits the best thermoelectric performance with a figure of merit of 0.67 at 415K.
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| E-mail |
ajh0163@hanmail.net |
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123rd General Meeting of the KCS