Evaluation of Thermoelectric Properties of Highly Dense Bi₂Te₃ Nanowire Arrays by Macro-Integration Method

Abstract:

High dense Bi2Te3 nanowire arrays were fabricated in porous anodic alumina (PAA) by electrochemical deposition. A macro-integration measurement was used to study the thermoelectric properties of a superimposed layer of Bi2Te3/PAA structure. In this macro-integration system, meaningful amounts of heat will transport along Bi2Te3 nanowire arrays, and so the measurement errors of micro-current and micro-temperature difference of individual nanowire can be eliminated. The influences of wire diameter, area fraction of wires and interface thermal resistance in the sandwich structure on the measurement accuracy of Seebeck coefficient and electrical conductivity of Bi2Te3/Al2O3 system were discussed. The experimental electrical conductivity is close to the theoretically calculated value. Further improvement in eliminating the interface thermal resistance would bring more reliable result in Seebeck coefficient measurement. The macro-integration measurement is a practical method to evaluate the thermoelectric properties of thermoelectric nanowire arrays.

• Periodical: Key Engineering Materials (Volume 352)
• Pages: 239-244
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.352.239
• Online since: August 2007
• Authors: Chun Fen Wang, Qun Wang, Sheng Cong Liufu, Qin Yao, Li Dong Chen
• Keywords: Bismuth Telluride, Macro-Integration Measurement, Nanowire Array, Thermoelectric Property

References

[1] L. D. Hicks, and M. S. Dresselhaus: Phys. Rev. B Vol. 47 (1993), p.12727.

[2] Collins, P. G. et al: Nanotechnology Vol. 9 (1998), pp.153-157.

[3] Cui, Y. et al: Scinece Vol. 291 (2001), pp.851-853.

[4] Dresselhaus, M. S. et al: Semiconductors and Semimetals Vol. 71 (2001), pp.1-121.

[5] Deyu Li, Amy Lucia Prieto, Yiying Wu, Marisol S. Martin-Gonzalez, Angelica Stacy, Timothy Sands, Ronald Gronsky, Peidong Yang, and Arun Majumdar: 21 st International Conference on Termoelectrics (2002) pp.333-336.

DOI: 10.1109/ict.2002.1190333

[6] S. B. cronin, Y. -M. Lin, M. R. Black, O. Rabin, and M. S. Dresselhaus: 21st International Conference on Thermoelectrics 243-248 (2002).

[7] Wang Wei, Wang Hui, and Gao Jianping: Transactions of Tianjin University Vol. 8 (2002), pp.243-245.

[8] Jingchen Zeng, Luo Qing, and Yuzhang Tang: The Properties of Physics and Chemistry of Complex Materials, National University of Defense Technology Publish (1998), pp.19-29.

[9] D. -A. Borca-Tasciuc, and G. Chen: App. Phy. Vol. 97 (2005), pp.084303-8.

[10] L. D. Hicks, and M. S. Dresselhaus: Phys. Rev. B Vol. 47 (1993), p.16631.

[11] X. Sun, and Z. Zhang, Dresselhaus: App. Phys. Lett. Vol. 74 (1999), p.4005.

[12] Hugh W. Hillhouse, and Mark T. Tuominen: Microporous and Mesoporous Materials Vol. 47 (2001), pp.39-50.