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Large external DeltaT and cooling power densities in thin-film Bi2Te3-superlattice thermoelectric cooling devices

Appl. Phys. Lett. 89, 122117 (2006); doi:10.1063/1.2353805

Published 22 September 2006

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G. E. Bulman, E. Siivola, B. Shen, and R. Venkatasubramanian
Center for Thermoelectrics Research, RTI International, Research Triangle Park, North Carolina 27709-2194
Experimental I-V-Tc-DeltaT data of thin-film superlattice thermoelectric modules is used to determine the internal DeltaT, cross-plane Seebeck coefficient, effective thermal interface resistance, device ZT, and Qmax. We demonstrate 55  K of external cooling at 300  K (Tcmin=244.8  K), with an estimated heat pumping capacity of 128  W/cm2. The average ZT300 for the best superlattice devices is 0.75, compared to 0.66 for a bulk BixSb2–xTe3/Bi2SexTe3–x device. Our model indicates a significantly higher internal DeltaT occurs across the active thermoelectric element, which was verified using buried thermocouples. ©2006 American Institute of Physics
History: Received 22 December 2005; accepted 16 July 2006; published 22 September 2006
Permalink: http://link.aip.org/link/?APPLAB/89/122117/1
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KEYWORDS and PACS

Keywords
PACS
  • 85.80.Fi
    Thermoelectric devices
  • YEAR: 2006

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ISSN:
0003-6951 (print)   1077-3118 (online)
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REFERENCES (14)
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