Please use this identifier to cite or link to this item: https://libjncir.jncasr.ac.in/xmlui/handle/10572/2212
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dc.contributor.authorPerumal, Suresh
dc.contributor.authorRoychowdhury, Subhajit
dc.contributor.authorBiswas, Kanishka
dc.date.accessioned2017-01-24T06:36:53Z-
dc.date.available2017-01-24T06:36:53Z-
dc.date.issued2016
dc.identifier.citationPerumal, S.; Roychowdhury, S.; Biswas, K., Reduction of thermal conductivity through nanostructuring enhances the thermoelectric figure of merit in Ge1-xBixTe. Inorganic Chemistry Frontiers 2016, 3 (1), 125-132 http://dx.doi.org/10.1039/c5qi00230cen_US
dc.identifier.citationInorganic Chemistry Frontiersen_US
dc.identifier.citation3en_US
dc.identifier.citation1en_US
dc.identifier.issn2052-1553
dc.identifier.urihttps://libjncir.jncasr.ac.in/xmlui/10572/2212-
dc.descriptionOpen Access (Manuscript)en_US
dc.description.abstractA promising thermoelectric figure of merit, zT, of similar to 1.3 at 725 K was obtained in high quality crystalline ingots of Ge1-xBixTe. The substitution of Bi3+ in a Ge2+ sublattice of GeTe significantly reduces the excess hole concentration due to the aliovalent donor dopant nature of Bi3+. Reduction in carrier density optimizes electrical conductivity, and subsequently enhances the Seebeck coefficient in Ge1-xBixTe. More importantly, a low lattice thermal conductivity of similar to 1.1 W m(-1) K-1 for Ge0.90Bi0.10Te was achieved, which is due to the collective phonon scattering from meso-structured grain boundaries, nano-structured precipitates, nano-scale defect layers, and solid solution point defects. We have obtained a reasonably high mechanical stability for the Ge1-xBixTe samples. The measured Vickers microhardness value of the high performance sample is similar to 165 H-V, which is comparatively higher than that of state-of-the-art thermoelectric materials, such as PbTe, Bi2Te3, and Cu2Se.en_US
dc.description.urihttp://dx.doi.org/10.1039/c5qi00230cen_US
dc.language.isoEnglishen_US
dc.publisherChinese Chemical Societyen_US
dc.rights@Chinese Chemical Society, 2016en_US
dc.subjectChemistryen_US
dc.subjectPerformance Bulk Thermoelectricsen_US
dc.subjectGermanium Antimony Telluridesen_US
dc.subjectValence-Band Convergenceen_US
dc.subjectMechanical-Propertiesen_US
dc.subjectPhase-Separationen_US
dc.subjectSolid-Solutionsen_US
dc.subjectAlloysen_US
dc.subjectGeteen_US
dc.subjectPbteen_US
dc.subjectTransporten_US
dc.titleReduction of thermal conductivity through nanostructuring enhances the thermoelectric figure of merit in Ge1-xBixTeen_US
dc.typeArticleen_US
Appears in Collections:Research Papers (Kaniska Biswas)

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