Khasimsaheb, B. and Singh, Niraj Kumar and Bathula, Sivaiah and Gahtori, Bhasker and Haranath, D. and Neeleshwar, S. (2017) The effect of carbon nanotubes (CNT) on thermoelectric properties of lead telluride (PbTe) nanocubes. Current Applied Physics , 17. pp. 306-313. ISSN 1567-1739

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Abstract

We report the thermoelectric properties of different weight percentage of carbon nano tubes (CNT) dispersed (0.025, 0.05 and 0.1%) in PbTe nanocubes matrix. The sample with 0.05% CNT distribution in the PbTe matrix significantly enhanced the electrical conductivity, and Seebeck coefficient above 450 K. In this system CNT's acting as a low energy filter at potential barrier and good passage for high energy electron which may cause enhance the electrical conductivity. Mixing of CNT into PbTe nanocubes created numerous additional interfaces which are acted as scattering centers for phonons and thus resulted in ultra low thermal conductivity of 0.24 and 032 W/m K at 525 K for 0.025 and 0.05% CNT dispersed PbTe matrix, respectively. An optimum quantity of CNT addition to PbTe enhanced the zT similar to 0.11 at 525 K for both 0.025 and 0.05% CNT dispersed PbTe matrix, respectively, which is 90% higher in comparison to PbTe nanocubes. Finally, CNT's dispersed PbTe nanocomposite exhibited good thermoelectric compatibility factor and these materials are good candidate materials for segmentation to get maximum power output during power generation applications.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/S Elsevier.
Subjects:	Materials Science Applied Physics/Condensed Matter
Divisions:	UNSPECIFIED
Depositing User:	Users 27 not found.
Date Deposited:	09 May 2019 08:18
Last Modified:	09 May 2019 08:18
URI:	http://npl.csircentral.net/id/eprint/2910

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