Thermoelectric Properties of Bi2Te3-Based Thin Films with Fine Grains Fabricated by Pulsed Laser Deposition
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概要
- 論文の詳細を見る
Bi2Te3-based thin films were fabricated on quartz glass substrates by the pulsed laser deposition (PLD) method. By adjustment of the substrate temperature, films with $c$-axis orientation to the surface of the substrates were grown, and their in-plane electric resistivity and Seebeck coefficient were comparable with those of the bulk material. In contrast, their cross-plane thermal conductivity (evaluated using a thermoreflectance system with nanosecond pulsed laser heating) was comparatively much lower, possibly due to the grain size being as small as 40 nm (estimated based on X-ray diffraction measurement). The dimensionless figure of merit, $\mathit{ZT}$, for in-plane direction of n-type Bi2Te3 thin films was estimated based on the measurement results.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2009-08-25
著者
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Obara Haruhiko
Energy Electronics Institute National Institute Of Advanced Industrial Science And Technology (aist)
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Ohta Michihiro
Energy Technol. Res. Inst. National Inst. Of Advanced Industrial Sci. And Technol.
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Ueno Kazuo
Energy Technology Research Institute National Institute Of Advanced Industrial Science And Technolog
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Yamamoto Atsushi
Energy Electronics Institute National Institute Of Advanced Industrial Science And Technology
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Iida Tsutomu
Department of Material Science and Technology, Faculty of Industrial Science and Technology, Tokyo University of Science, Noda, Chiba 278-8510, Japan
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Higomo Shun
Energy Technology Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8568, Japan
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Ueno Kazuo
Energy Technology Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8568, Japan
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Ohta Michihiro
Energy Technology Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8568, Japan
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Obara Haruhiko
Energy Technology Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8568, Japan
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