Bathula, Sivaiah and Jayasimhadri, M. and Singh, Nidhi and Srivastava, A. K. and Pulikkotil, Jiji and Dhar, Ajay and Budhani, R. C. (2012) Enhanced thermoelectric figure-of-merit in spark plasma sintered nanostructured n-type SiGe alloys. Applied Physics Letters, 101 (21). pp. 213902-213907. ISSN 0003-6951

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We report a significant enhancement in the thermoelectric figure-of-merit of phosphorous doped nanostructured n-type Si80Ge20 alloys, which were synthesized employing high energy ball milling followed by rapid-heating using spark plasma sintering. The rapid-heating rates, used in spark plasma sintering, allow the achievement of near-theoretical density in the sintered alloys, while retaining the nanostructural features introduced by ball-milling. The nanostructured alloys display a low thermal conductivity (2.3W/mK) and a high value of Seebeck coefficient (-290 mu V/K) resulting in a significant enhancement in ZT to about 1.5 at 900 degrees C, which is so far the highest reported value for n-type Si80Ge20 alloys.

Item Type: Article
Additional Information: Copyright for this article belongs to M/s American Institute of Physics.
Subjects: Applied Physics/Condensed Matter
Depositing User: Users 27 not found.
Date Deposited: 04 Mar 2020 11:35
Last Modified: 04 Mar 2020 11:35

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