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A study of the synthesis of bismuth tellurium selenide nanocompounds and procedures for improving their thermoelectric performance

Title
A study of the synthesis of bismuth tellurium selenide nanocompounds and procedures for improving their thermoelectric performance
Authors
Kim, C[Kim, Cham]Kim, DH[Kim, Dong Hwan]Kim, JS[Kim, Jong Sook]Han, YS[Han, Yoon Soo]Chung, JS[Chung, Jong Shik]Kim, H[Kim, Hoyoung]
DGIST Authors
Kim, C[Kim, Cham]Kim, DH[Kim, Dong Hwan]; Kim, JS[Kim, Jong Sook]; Kim, H[Kim, Hoyoung]
Issue Date
2011-09-29
Citation
Journal of Alloys and Compounds, 509(39), 9472-9478
Type
Article
Article Type
Article
Keywords
Atmospheric EnvironmentBi2Te ySe3-yBismuthChemical SynthesisCrystalline StructureLow Thermal ConductivityNano-Sized GrainsNanocompoundNanocompoundsSelenidesSintering ConditionSpark Plasma SinteringSpark Plasma Sintering ProcessSynthesis (Chemical)TelluriumTellurium CompoundsThermal ConductivityThermo-Electric ApplicationThermo-Electric PerformanceThermo-ElectricityThermo-ElectricsTransport PropertiesWater BasedZT
ISSN
0925-8388
Abstract
A bismuth tellurium selenide (Bi2TeySe3-y) nanocompound for thermoelectric applications was successfully prepared via a water-based chemical reaction in an atmospheric environment. The compound was less that ca. 100 nm in size, with a crystalline structure corresponding to the rhombohedral Bi2Te2.7Se0.3. We sintered the compound via a spark plasma sintering process under the designated sintering conditions and measured the transport properties (i.e., thermal conductivity, resistivity, Seebeck coefficient). The resulting specimens consisted of nanosized grains exhibiting a remarkably low thermal conductivity. Subsequently, we endeavored to improve the other transport properties by adjusting the carrier density of the compound and derived the overall thermoelectric performance by the figure of merit (ZT). © 2011 Elsevier B.V.
URI
http://hdl.handle.net/20.500.11750/3435
DOI
10.1016/j.jallcom.2011.07.040
Publisher
ELSEVIER SCIENCE SA
Related Researcher
Files:
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Collection:
ETC1. Journal Articles


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