| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Thermoelectric Performances of Free-Standing Polythiophene and Poly(3-Methylthiophene) Nanofilms |
LU Bao-Yang1, LIU Cong-Cong1, LU Shan2, XU Jing-Kun1, JIANG Feng-Xing1, LI Yu-Zhen1, ZHANG Zhuo3
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| 1Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University, Nanchang 330013 2Department of Control Science and Engineering, Zhejiang University, Hangzhou 310027 3BOE Technology Group Co. Ltd., Beijing 100016 |
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| Cite this article: |
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LU Bao-Yang, LIU Cong-Cong, LU Shan et al 2010 Chin. Phys. Lett. 27 057201 |
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Abstract Thermoelectric performances of free-standing polythiophene (PT) and poly(3-methylthiophene) (PMeT) nanofilms with high tensile strength electrosynthesized from boron trifluoride diethyl etherate (BFEE) are systematically investigated. They display decent electric conductivity (47 and 73 S·cm-1), high Seebeck coefficient (130 and 76 μV·K-1) and low thermal conductivity (0.17 and 0.15 W·m-1·K-1) at room temperature. Their figure of merit can reach 3.0×10-2 at 250 K, higher than that of many other conducting polymers. The decrease of charge carrier concentration resulting from volatile and water-sensitive dopants from BFEE leads to the decrease of electrical conductivity but a substantial increase of the Seebeck coefficient, making their figure-of-merit values maintained at more than 10-2 even after prolonged storage (two months). Moreover, free-standing PT and PMeT exhibit much better thermoelectric performances than those in pressed pellets due to the good arrangement of the polymer chains and preferably oriented structure in films. It therefore provides a way to improve the thermoelectric performances of conducting polymers by controlling regularity of the extended conjugated chain structure and/or the chain packing to achieve high charge mobility.
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| Keywords:
72.20.Pa
72.80.Le
73.50.Lw
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Received: 02 December 2009
Published: 23 April 2010
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| PACS: |
72.20.Pa
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(Thermoelectric and thermomagnetic effects)
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72.80.Le
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(Polymers; organic compounds (including organic semiconductors))
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73.50.Lw
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(Thermoelectric effects)
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[1] Rowe D M 1995 CRC Handbook of Thermoelectric (Florida: CRC)
[2] Shakouri A and Li S Q 1999 Proceedings of 18 th International Conference on Thermoelectrics} (Baltimore, USA 29 August-2 September 1999) p 402
[3] Skotheim T A 1986 Handbook of Conducting Polymers (New York: Marcel Dekker)
[4] Roncali J 1992 Chem. Rev. 92 711
[5] Lu B Y, Xu J K, Fan C L, Miao H M and Shen L 2009 J. Phys. Chem. B 113 37
[6] Ma M L, Liu H T, Xu J K, Li Y Z and Wan Y Q 2007 J. Phys. Chem. C 111 6889
[7] Yakuphanoglu F, Liu H T and Xu J K 2007 J. Phys. Chem. B 111 7535
[8] Kemp N T, Kaiser A B, Liu C J et al 1999 J. Polym. Sci. Part B: Polym. Phys. 37 953
[9] Yakuphanoglu F and Senkal B F 2007 J. Phys. Chem. C 111 1840
[10] Jin S Cong S, Xue G, Xiong H, Mansdorf B and Cheng S Z D 2002 Adv. Mater. 14 1492
[11] Carrasco P M, Cortazar M, Ochoteco E, Calahorra E and Pomposo J A 2007 Surf. Interface Anal. 39 26
[12] Lévesque I, Gao X, Klug D D, Tse J S, Ratcliffe C I and Leclerc M 2005 React. Funct. Polym. 65 23
[13] Lévesque I, Bertrand P O, Blouin N, Leclerc M et al 2007 Chem. Mater. 19 2128
[14] Jiang F X, Xu J K, Lu B Y, Xie Y, Huang R J and Li L F 2008 Chin. Phys. Lett. 25 2202
[15] Shinohara Y, Hiraishi K, Nakanishi H, Isoda Y and Imai Y 2005 Trans. Mater. Res. Soc. Jpn. 30 963
[16] Shi G Q, Jin S, Xue G and Li C 1995 Science 267 994
[17] Zhou L, Jin S and Xue G 1996 Macromol. Chem. Phys. 197 3309
[18] Hiroshige Y, Ookawa M and Toshima N 2007 Synth. Met. 157 467
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