Thermoelectric properties of spark plasma sintered lead telluride nanocubes
IR@NPL: CSIR-National Physical Laboratory, New Delhi
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| Title |
Thermoelectric properties of spark plasma sintered lead telluride nanocubes
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| Creator |
Bayikadi, Khasimsaheb
Sonnathi, Neeleshwar Srikanth, Mandava |
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| Subject |
Materials Science
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| Description |
We report a cost-effective, surfactant-free, and scalable synthesis technique for lead telluride (PbTe) nanocubes by a chemical precipitation method. The high-resolution transmission electron microscopy studies indicated the evolution of nucleation centers (spherical) into nanocubes with the addition of the Pb and Te atoms. The spark plasma sintered PbTe nanocubes exhibited an enhanced Seebeck coefficient, S > +400 mu V, higher than the reported values of the bulk PbTe over an extended temperature range of 300-425 K, and a moderate electrical conductivity, sigma similar to 8000 S/m at 300 K. A significant reduction in the lattice thermal conductivity was observed due to effective phonon scattering from the presence of numerous interfaces introduced by nanostructuring. The resulting figure-of-merit (ZT) similar to 0.45 at 300 K is higher than the reported values at this temperature in other PbTe nanostructures. Moreover, a moderate thermoelectric compatibility factor makes the PbTe nanocubes a potential candidate for green energy generation.
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| Publisher |
Cambridge University Press (CUP)
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| Date |
2015-09-14
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://npl.csircentral.net/2051/1/357.pdf
Bayikadi, Khasimsaheb and Sonnathi, Neeleshwar and Srikanth, Mandava (2015) Thermoelectric properties of spark plasma sintered lead telluride nanocubes. Journal of Materials Research, 30 (17). 2638-2648 . ISSN 0884-2914 |
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| Relation |
http://npl.csircentral.net/2051/
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