Evaluation of Thermoelectric Properties of Polythiophene Films Synthesized by Electrolytic Polymerization
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概要
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Polythiophene films were synthesized by electrolytic polymerization, and the synthetic parameters and their thermoelectric properties, i.e., Seebeck coefficient and electric conductivity, were investigated in detail. The Seebeck coefficient tended to decrease with increasing electric conductivity. However, the thermoelectric power factor increased with electric conductivity, and was $1.03\times 10^{-5}$ W$\cdot$m-1$\cdot$K-2 at 23 μV$\cdot$K-1 and at 201 S$\cdot$cm-1. This value is large compared with those of other conductive polymers, and the figure of merit reached to one thirty against Bi–Te system. In addition, the elaborated surface morphology and internal structure, i.e., crystallinity, of the films were also evaluated by scanning electron microscopy, X-ray diffraction, and elemental analysis, and the relationship between thermoelectric properties and structure was discussed.
- 2009-07-25
著者
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Nakanishi Hachiro
Institute For Chemical Reaction Science Tohoku University
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Hiraishi Kentaro
Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
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Oikawa Hidetoshi
Institute for Chemical Reaction Science, Tohoku University, Aoba-ku, Sendai 980-8577, Japan
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Masuhara Akito
Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University, Aoba-ku, Sendai 980-8577, Japan
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Shinohara Yosikazu
National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan
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Masuhara Akito
Institute for Multidisciplinary Research for Advanced Materials, Tohoku University
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