Thermoelectric behavior of conducting polymers: On the possibility of off-diagonal thermoelectricity

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Non-cubic materials, when structurally aligned, possess sufficient anisotropy to exhibit thermoelectric effects where the electrical and thermal paths can be orthogonal due to off-diagonal thermoelectricity (ODTE). The authors discuss the benefits of this form of thermoelectricity for device applications and describe a search for suitable thermoelectric properties in the air-stable conducting polymers polyaniline and polypyrrole. They find, at 300K for diagonal (ordinary) thermoelectricity (DTE), the general correlation that the logarithm of the electrical conductivity varies linearly with the Seebeck coefficient on doping, but with a proportionality in excess of a prediction from theory. The correlation is unexpected in its universality ... continued below

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Medium: P; Size: 21 p.

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Mateeva, N.; Testardi, L.; Niculescu, H. & Schlenoff, J. December 1, 1998.

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  • Mateeva, N.
  • Testardi, L. TecOne, Inc., Tallahassee, FL (United States)
  • Niculescu, H. Florida A and M Univ./Florida State Univ., Tallahassee, FL (United States) Coll. of Engineering
  • Schlenoff, J. Florida State Univ., Tallahassee, FL (United States). Chemistry Dept.

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Description

Non-cubic materials, when structurally aligned, possess sufficient anisotropy to exhibit thermoelectric effects where the electrical and thermal paths can be orthogonal due to off-diagonal thermoelectricity (ODTE). The authors discuss the benefits of this form of thermoelectricity for device applications and describe a search for suitable thermoelectric properties in the air-stable conducting polymers polyaniline and polypyrrole. They find, at 300K for diagonal (ordinary) thermoelectricity (DTE), the general correlation that the logarithm of the electrical conductivity varies linearly with the Seebeck coefficient on doping, but with a proportionality in excess of a prediction from theory. The correlation is unexpected in its universality and unfavorable in its consequences for applications in DTE and ODTE. A standard model suggests that conduction by carriers of both signs occurs in these polymers, which thus leads to reduced thermoelectric efficiency. They also discuss polyacetylene (which is not air-stable), where this ambipolar conduction does not occur, and where properties seem more favorable for thermoelectricity.

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Medium: P; Size: 21 p.

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OSTI as DE99001053

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  • Other Information: PBD: [1998]

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  • Other: DE99001053
  • Report No.: DOE/ER/12171--1
  • Grant Number: FG02-95ER12171
  • DOI: 10.2172/291149 | External Link
  • Office of Scientific & Technical Information Report Number: 291149
  • Archival Resource Key: ark:/67531/metadc680536

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  • December 1, 1998

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

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  • Nov. 6, 2015, 8:17 p.m.

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Mateeva, N.; Testardi, L.; Niculescu, H. & Schlenoff, J. Thermoelectric behavior of conducting polymers: On the possibility of off-diagonal thermoelectricity, report, December 1, 1998; United States. (digital.library.unt.edu/ark:/67531/metadc680536/: accessed December 13, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.