Thermoelectric properties of indium doped PbTe1-ySey alloys

Bali, Ashoka and Wang, Heng and Snyder, Jeffrey G and Mallik, Ramesh Chandra (2014) Thermoelectric properties of indium doped PbTe1-ySey alloys. In: JOURNAL OF APPLIED PHYSICS, 116 (3).

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Abstract

Lead telluride and its alloys are well known for their thermoelectric applications. Here, a systematic study of PbTe1-ySey alloys doped with indium has been done. The powder X-Ray diffraction combined with Rietveld analysis confirmed the polycrystalline single phase nature of the samples, while microstructural analysis with scanning electron microscope results showed densification of samples and presence of micrometer sized particles. The temperature dependent transport properties showed that in these alloys, indium neither pinned the Fermi level as it does in PbTe, nor acted as a resonant dopant as in SnTe. At high temperatures, bipolar effect was observed which restricted the zT to 0.66 at 800 K for the sample with 30% Se content. (C) 2014 AIP Publishing LLC.

Item Type:	Journal Article
Publication:	JOURNAL OF APPLIED PHYSICS
Additional Information:	Copy right for this article belongs to the AMER INST PHYSICS, CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	18 Sep 2014 09:11
Last Modified:	18 Sep 2014 09:11
URI:	http://eprints.iisc.ac.in/id/eprint/49904

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