Thermoelectric Module of P-Type Ca-Co-O/N-Type ZnO Thin Films


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Thin films thermoelectric module fabricated by pulsed-dc magnetron sputtering system using Ca3Co4O9 (p-type) and ZnO (n-type) targets of 60 mm diameter and 2.5 mm thickness, which were made from powder precursor, and obtained by solid state reaction. Thin films of p-Ca-Co-O (Seebeck coefficient = 143.85 µV/K, electrical resistivity = 4.80 mΩm, power factor = 4.31 µW/m K2) and n-ZnO (Seebeck coefficient =229.24 µV/K, electrical resistivity = 5.93 mΩm, power factor = 8.86 µW/m K2) were used to make a thermoelectric module, which consist of four pairs of legs connected by copper electrodes (0.5 mm thickness, 3.0 mm width, and 3.0-8.0 mm length). Each leg is 3.0 mm width, 20.0 mm length, and 0.44 µm thickness on a glass substrate of 1.0 mm thickness in dimension 25.0x50.0 mm2. For preliminary test, a module was used to thermoelectric power generation. It was found that the open circuit voltage increased with increasing temperature difference from 3 mV at 5 K up to 20 mV at 78 K. The internal resistance of a module reached a value of 14.52 MΩ. This test indicated that a module can be generated the electrical power. Therefore, it can be used as an important platform for further thin films thermoelectric module research.



Advanced Materials Research (Volumes 622-623)

Edited by:

R. Sivakumar




W. Somkhunthot et al., "Thermoelectric Module of P-Type Ca-Co-O/N-Type ZnO Thin Films", Advanced Materials Research, Vols. 622-623, pp. 726-733, 2013

Online since:

December 2012




[1] G.S. Nolas, J. Sharp and H.J. Goldsmid. Thermoelectrics, Basic Principles and New Materials Developments, Berling, Springer-Verlag (2001).

[2] D.M. Rowe. CRC Handbook of Thermoelectrics, Boca Raton, FL, CRC Press (1995).

[3] E. Altenkirch. Physik. Zeit. Vol. 12 (1911) pp.920-4.

[4] Information on http: /ecee. colorado. edu/~bart/book.

[5] C. Wood. Rep. Prog. Phys. Vol. 51 (1988) pp.459-539.

[6] Information on http: /web. me. unr. edu/me372/Spring2001.

[7] Information on http: /www. nextreme. com/media/pdf/whitepapers/Nextreme_Thin_Film. pdf.

[8] Information on http: /www. aist. go. jp/aist_e/latest_research/2005/20050617/20050617. html.

[9] Information on http: /www. thermoelectrics. caltech. edu.

[10] Y.F. Hu, E. Sutter, W.D. Si and Q. Li. Appl. Phys. Lett. Vol. 87, No. 17 (2005) pp.1719121-4.

[11] H. Eng, W. Prellier, S. Hébert, D. Grebille, L. Méchin and B. Mercey. J. Appl. Phys. Vol. 97, No. 1 (2005), pp.0137061-5.

[12] R. Moubah, S. Colis, C. Ulhaq-Bouillet and A. Dinia. Appl. Phys. Lett. Vol. 96, No. 4 (2010) pp.0419021-3.


[13] S. Akihiro, K. Tsutomu, Y. Satoshi, O. Akihiro and A. Hideaki. Jpn. J. Appl. Phys. Vol. 44, No. 28-32 (2005), L966-9.

[14] S. Wang, M. Chen, L. He, J. Zheng, W. Yu and G. Fu. J. Phys. D: Appl. Phys. Vol. 42, No. 4 (2009), pp.045410-3.

[15] A. Azam, F. Ahmed, N. Arshi, M. Chaman and A.H. Naqvi. Int. J. Theoretical Appl. Sci. Vol. 1, No. 2 (2009), 12-4.

[16] T. Kinemuchi, M. Mikami, K. Kobayashi, K. Watari and Y. Hotta. J. Electron Mater. Vol. 39, No. 9 (2010), pp.2059-3.

[17] Y. Inoue, M. Okamoto, T. Kawahara, Y. Okamoto and J. Morimoto. Mater. Trans. Vol. 46, No. 7 (2005), pp.1470-5.

[18] Information on http: /en. cnki. com. cn/Article_en/CJFDTOTAL-ZKKX201103010. htm.

[19] W. Somkhunthot, T. Burinprakhon, I. Thomas, V. Amornkitbamrung and T. Seetawan. ELEKTRIKA: J. Elec. Eng. Vol. 9, No. 2 (2007), pp.20-6.

[20] W. Somkhunthot. Asymmetric Bipolar Pulsed-DC Magnetron Sputtering for the Preparation of NaxCo2O4 Thin Films. ‏ Doctor of Philosophy Thesis in Physics, ‏ Graduate School, Khon Kaen University (2009).

[21] Information on http: /www. nist. gov/pml/data/asd. cfm.

[22] S. Tolansky. An Introduction to Interferometry, London, Kongmans, Green & Co. Ltd., London (1955).

[23] K. Jayachandran. Electrical, Optical and Structural Studies in Bismuth, Antimony, Bismuth Oxide and Antimony Oxide Thin Films, Ph.D. Thesis, Mahatma Gandhi University, Kerala (1997).

[24] C. Yunus and M. Boles. Thermodynamics: An Engineering Approach, Hightstown, McGraw Hill (1998).

[25] L.J. van der Pauw. Philips Tech. Rev. Vol. 20, No. 8 (1958), p.220–4.