Anisotropic hopping conduction in spin-coated PEDOT:PSS thin films

A.M. Nardes; M. Kemerink; R.A.J. Janssen

doi:10.1103/PhysRevB.76.085208

Anisotropic hopping conduction in spin-coated PEDOT:PSS thin films

A.M. Nardes, M. Kemerink, R.A.J. Janssen

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Abstract

The charge transport in spin-coated poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) has been investigated as a function of temp. and elec. field. Both the magnitude and the transport mechanism are found to be strongly anisotropic. This striking behavior is quant. explained in terms of a morphol. model in which flattened, quasimetallic PEDOT-rich grains are organized in horizontal layers that are sepd. by continuous insulating PSS lamellas. In this model, the in-plane cond. is described by three-dimensional variable range hopping between .apprx.25 nm sized PEDOT-rich particles sepd. by subnanometer PSS barriers, while the out-of-plane cond. is described by nearest-neighbor hopping between more widely spaced mol. sites. These length scales are supported by previously reported scanning probe measurements.

Original language	English
Article number	085208
Pages (from-to)	085208-1/7
Number of pages	7
Journal	Physical Review B
Volume	76
Issue number	8
DOIs	https://doi.org/10.1103/PhysRevB.76.085208
Publication status	Published - 2007

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title = "Anisotropic hopping conduction in spin-coated PEDOT:PSS thin films",

abstract = "The charge transport in spin-coated poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) has been investigated as a function of temp. and elec. field. Both the magnitude and the transport mechanism are found to be strongly anisotropic. This striking behavior is quant. explained in terms of a morphol. model in which flattened, quasimetallic PEDOT-rich grains are organized in horizontal layers that are sepd. by continuous insulating PSS lamellas. In this model, the in-plane cond. is described by three-dimensional variable range hopping between .apprx.25 nm sized PEDOT-rich particles sepd. by subnanometer PSS barriers, while the out-of-plane cond. is described by nearest-neighbor hopping between more widely spaced mol. sites. These length scales are supported by previously reported scanning probe measurements.",

author = "A.M. Nardes and M. Kemerink and R.A.J. Janssen",

year = "2007",

doi = "10.1103/PhysRevB.76.085208",

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T1 - Anisotropic hopping conduction in spin-coated PEDOT:PSS thin films

AU - Nardes, A.M.

AU - Kemerink, M.

AU - Janssen, R.A.J.

PY - 2007

Y1 - 2007

N2 - The charge transport in spin-coated poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) has been investigated as a function of temp. and elec. field. Both the magnitude and the transport mechanism are found to be strongly anisotropic. This striking behavior is quant. explained in terms of a morphol. model in which flattened, quasimetallic PEDOT-rich grains are organized in horizontal layers that are sepd. by continuous insulating PSS lamellas. In this model, the in-plane cond. is described by three-dimensional variable range hopping between .apprx.25 nm sized PEDOT-rich particles sepd. by subnanometer PSS barriers, while the out-of-plane cond. is described by nearest-neighbor hopping between more widely spaced mol. sites. These length scales are supported by previously reported scanning probe measurements.

AB - The charge transport in spin-coated poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) has been investigated as a function of temp. and elec. field. Both the magnitude and the transport mechanism are found to be strongly anisotropic. This striking behavior is quant. explained in terms of a morphol. model in which flattened, quasimetallic PEDOT-rich grains are organized in horizontal layers that are sepd. by continuous insulating PSS lamellas. In this model, the in-plane cond. is described by three-dimensional variable range hopping between .apprx.25 nm sized PEDOT-rich particles sepd. by subnanometer PSS barriers, while the out-of-plane cond. is described by nearest-neighbor hopping between more widely spaced mol. sites. These length scales are supported by previously reported scanning probe measurements.

U2 - 10.1103/PhysRevB.76.085208

DO - 10.1103/PhysRevB.76.085208

M3 - Article

SN - 1098-0121

VL - 76

SP - 085208-1/7

JO - Physical Review B

JF - Physical Review B

IS - 8

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ER -

Anisotropic hopping conduction in spin-coated PEDOT:PSS thin films

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