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Significant Enhancement in the Thermoelectric Performance of a Bismuth Telluride Nanocompound through Brief Fabrication Procedures

Title
Significant Enhancement in the Thermoelectric Performance of a Bismuth Telluride Nanocompound through Brief Fabrication Procedures
Authors
Kim, ChamKim, Dong HwanKim, HoyoungChung, Jong Shik
DGIST Authors
Kim, ChamKim, Dong HwanKim, Hoyoung
Issue Date
2012-06
Citation
ACS Applied Materials and Interfaces, 4(6), 2949-2954
Type
Article
Article Type
Article
Keywords
Atmospheric ConditionsBismuth CompoundsBismuth TellurideCalcinationCarrier ConcentrationCarrier MobilityChemical SynthesisElectric ConductivityElectrical ResistivityFabrication ProcedureFigure of MeritsNano-StructuresPost Thermal TreatmentStoichiometryThermal ConductivityThermo-Electric ApplicationThermo-Electric MaterialThermo-Electric MaterialsThermo-Electric PerformanceThermo-ElectricityTransport PropertiesWater BasedZT
ISSN
1944-8244
Abstract
A binary BiTe nanocompound for thermoelectric applications was prepared via a water-based chemical reaction under atmospheric conditions. We attempted to increase the carrier mobility of the nanocompound by adopting a post-thermal treatment consisting of calcination and reduction at different temperatures. We also tried to control the carrier density of the compound by adjusting the stoichiometry of the atomic constituents. We measured other transport properties (i.e., electrical resistivity, Seebeck coefficient, and thermal conductivity) and observed how these properties were affected by both the carrier mobility and the carrier density. We derived the thermoelectric performance, as captured by the figure of merit (ZT), from the transport properties and discussed the effect of such properties on the ZT value. The nanocompound exhibited a very competent ZT value (0.91 at 100 °C), which is one of the best thermoelectric performances of chemically synthesized BiTe materials. © 2012 American Chemical Society.
URI
http://hdl.handle.net/20.500.11750/5358
DOI
10.1021/am3002764
Publisher
American Chemical Society
Related Researcher
Files:
There are no files associated with this item.
Collection:
Magnet-Controlled Materials Research Group1. Journal Articles


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