Anisotropic hopping conduction in spin-coated PEDOT: PSS thin films
The charge transport in spin-coated poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) has been investigated as a function of temperature and electric field. Both the magnitude and the transport mechanism are found to be strongly anisotropic. This striking behavior is quantitatively...
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| Main Authors: | , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
20 August 2007
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| In: |
Physical review. B, Condensed matter and materials physics
Year: 2007, Volume: 76, Issue: 8 |
| ISSN: | 1550-235X |
| DOI: | 10.1103/PhysRevB.76.085208 |
| Online Access: | Verlag, Volltext: https://doi.org/10.1103/PhysRevB.76.085208 Verlag, Volltext: https://link.aps.org/doi/10.1103/PhysRevB.76.085208 
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| Author Notes: | A.M. Nardes, M. Kemerink, and R.A.J. Janssen |
| Summary: | The charge transport in spin-coated poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) has been investigated as a function of temperature and electric field. Both the magnitude and the transport mechanism are found to be strongly anisotropic. This striking behavior is quantitatively explained in terms of a morphological model in which flattened, quasimetallic PEDOT-rich grains are organized in horizontal layers that are separated by continuous insulating PSS lamellas. In this model, the in-plane conductivity is described by three-dimensional variable range hopping between ∼25nm sized PEDOT-rich particles separated by subnanometer PSS barriers, while the out-of-plane conductivity is described by nearest-neighbor hopping between more widely spaced molecular sites. These length scales are supported by previously reported scanning probe measurements. |
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| Item Description: | Gesehen am 09.12.2019 |
| Physical Description: | Online Resource |
| ISSN: | 1550-235X |
| DOI: | 10.1103/PhysRevB.76.085208 |