| 학회 |
한국공업화학회 |
| 학술대회 |
2017년 봄 (05/10 ~ 05/12, 광주 김대중컨벤센센터(Kimdaejung Convention Center)) |
| 권호 |
21권 1호 |
| 발표분야 |
무기재료 |
| 제목 |
High performance n-type Bi2Te3-based materials with unusually off-stoichiometric compositions |
| 초록 |
Thermoelectric materials are a promising renewable energy sources that generate electrical energy from the temperature gradient. While most of the recent advances in the enhancement of the thermoelectric figure of merit (ZT) resulted from a decrease in lattice thermal conductivity by nanostructuring, there have been very few attempts to enhance power factor. Here, we report the remarkably enhanced power factor and a ZT of n-type Bi2Te3-based materials. We employed nanochemistry to stabilize bulk Bi2Te3 that goes beyond phase equilibrium. Obtained nanotubes are converted to bulk phases by sintering under high pressure and temperature. Incorporated potassium and tellurium in Bi2Te3 far exceeds their solubility limit, leading to simultaneous increase in the electrical conductivity and the Seebeck coefficient along with decrease in the thermal conductivity. |
| 저자 |
이명정1, 현택환2, 정인3
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| 소속 |
1Center for Nanoparticle Research, 2Institute for Basic Science (IBS) / School of Chemical and Biological Engineering and Institute of Chemical Processes, 3Seoul National Univ. |
| 키워드 |
Thermoelectrics; Bi2Te3; nanostructure
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| E-Mail |
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