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A thermoelectric voltage effect in polyethylene oxide

The conductivity of polyethylene oxide (PEO) is described with a three-dimensional hopping model considering electrostatic interactions between the ions. Ions fluctuate over energy-barriers in a multi-well potential. To decide whether positive or negative charges are responsible for this conductivit...

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Bibliographic Details
Main Authors: Martin, Björn (Author) , Wagner, Achim (Author) , Kliem, Herbert (Author)
Format: Article (Journal)
Language:English
Published: 29 January 2003
In: Journal of physics. D, Applied physics
Year: 2003, Volume: 36, Issue: 4, Pages: 343-347
ISSN:1361-6463
DOI:10.1088/0022-3727/36/4/304
Online Access:Verlag, Volltext: https://doi.org/10.1088/0022-3727/36/4/304
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Author Notes:Björn Martin, Achim Wagner and Herbert Kliem
Description
Summary:The conductivity of polyethylene oxide (PEO) is described with a three-dimensional hopping model considering electrostatic interactions between the ions. Ions fluctuate over energy-barriers in a multi-well potential. To decide whether positive or negative charges are responsible for this conductivity, the thermoelectric voltage is measured. The samples are embedded between two aluminium-electrodes. The oxide on the interface between the electrodes and the PEO serves as a blocking layer. The temperature of each electrode is controlled by a Peltier element. A temperature step is applied to one electrode by changing the temperature of one of the Peltier elements. Due to this temperature gradient, the mobile charges fluctuate thermally activated from the warmer side to the colder side of the sample. The direction of the measured thermoelectric voltage indicates the type of mobile charges. It is found that positive charges are mobile. Further, it is shown that the absolute value of the thermoelectric voltage depends on the energy-barrier heights in the multi-well potential.
Item Description:Gesehen am 14.01.2020
Physical Description:Online Resource
ISSN:1361-6463
DOI:10.1088/0022-3727/36/4/304

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