ZT enhancement in solution-grown Sb(2-x)BixTe 3 nanoplatelets

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Autor/in:
Erscheinungsjahr:
2010
Medientyp:
Text
Schlagworte:
  • Thermoelectricity
  • Thermoelectric equipment
  • Bismuth telluride
  • Thermoelectric Equipment
  • Thermal Conductivity
  • phonon-glass electron-crystal
  • thermoelectrics
  • nanostructured solids
  • colloids
  • thermal conductivity
  • Thermoelectricity
  • Thermoelectric equipment
  • Bismuth telluride
  • Thermoelectric Equipment
  • Thermal Conductivity
Beschreibung:
  • We report a solution-processed, ligand-supported synthesis of 15-20 nm thick Sb(2-x)BixTe3 nanoplatelets. After complete ligand removal by a facile NH3-based etching procedure, the platelets are spark plasma sintered to a p-type nanostructured bulk material with preserved crystal grain sizes. Due to this nanostructure, the total thermal conductivity is reduced by 60% in combination with a reduction in electric conductivity of as low as 20% as compared to the bulk material demonstrating the feasibility of the phonon-glass electron-crystal concept. An enhancement in the dimensionless thermoelectric figure of merit of up to 15% over state-of-the-art bulk materials is achieved, meanwhile, shifting the maximum to significantly higher temperatures. © 2010 American Chemical Society.
Lizenz:
  • info:eu-repo/semantics/restrictedAccess
Quellsystem:
Forschungsinformationssystem der UHH
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oai:www.edit.fis.uni-hamburg.de:publications/65a89cb6-9f5b-4112-82f1-50f5e9b80436