Dispersive hole transport in polymer

carbon nanotube composites

A. R. Inigo, S. J. Henley, S. R. P. Silva

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The hole transport properties of poly(2-methoxy, 5-(2'-ethyl-hexoxy)-p-phenylene vinylene) (MEH-PPV) blended with acid oxidized multiwall carbon nanotubes (COOH-MWCNTs) were investigated in a diode configuration using the time-of-flight (TOF) photocurrent method. While the room temperature hole mobility in pure MEH-PPV films was non-dispersive with positive field dependent mobility, MEH-PPV: COOH-MWCNT blended devices exhibited dispersive transport and negative field dependent mobility. This indicates that the hole mobility in this composite is influenced by positional disorder caused by the presence of COOH-MWCNTs in the MEH-PPV matrix. These results strongly suggest that the distribution of COOH-MWCNTs optimising in the organic matrix is important for charge transport in the high mobility nanotube component to be activated, when used in hybrid material systems.

Original languageEnglish
Article number265711
Number of pages6
JournalNanotechnology
Volume22
Issue number26
DOIs
Publication statusPublished - 1 Jul 2011

Fingerprint

Carbon Nanotubes
Hole mobility
Carbon nanotubes
Polymers
Hybrid materials
Composite materials
Photocurrents
Transport properties
Nanotubes
Charge transfer
Diodes
Acids
Temperature

Keywords

  • electric-field dependence
  • cells
  • films
  • morphology
  • MEH-PPV
  • drift mobility
  • conjugated polymers
  • charge-transport
  • dispersive hole transport
  • polymer
  • carbon nanotube composites

Cite this

Inigo, A. R. ; Henley, S. J. ; Silva, S. R. P. / Dispersive hole transport in polymer : carbon nanotube composites. In: Nanotechnology. 2011 ; Vol. 22, No. 26.
@article{451ea2dfa5434d0b895136b3d41c90b3,
title = "Dispersive hole transport in polymer: carbon nanotube composites",
abstract = "The hole transport properties of poly(2-methoxy, 5-(2'-ethyl-hexoxy)-p-phenylene vinylene) (MEH-PPV) blended with acid oxidized multiwall carbon nanotubes (COOH-MWCNTs) were investigated in a diode configuration using the time-of-flight (TOF) photocurrent method. While the room temperature hole mobility in pure MEH-PPV films was non-dispersive with positive field dependent mobility, MEH-PPV: COOH-MWCNT blended devices exhibited dispersive transport and negative field dependent mobility. This indicates that the hole mobility in this composite is influenced by positional disorder caused by the presence of COOH-MWCNTs in the MEH-PPV matrix. These results strongly suggest that the distribution of COOH-MWCNTs optimising in the organic matrix is important for charge transport in the high mobility nanotube component to be activated, when used in hybrid material systems.",
keywords = "electric-field dependence, cells , films, morphology, MEH-PPV, drift mobility, conjugated polymers, charge-transport, dispersive hole transport , polymer , carbon nanotube composites",
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Dispersive hole transport in polymer : carbon nanotube composites. / Inigo, A. R.; Henley, S. J.; Silva, S. R. P.

In: Nanotechnology, Vol. 22, No. 26, 265711, 01.07.2011.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Dispersive hole transport in polymer

T2 - carbon nanotube composites

AU - Inigo, A. R.

AU - Henley, S. J.

AU - Silva, S. R. P.

PY - 2011/7/1

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N2 - The hole transport properties of poly(2-methoxy, 5-(2'-ethyl-hexoxy)-p-phenylene vinylene) (MEH-PPV) blended with acid oxidized multiwall carbon nanotubes (COOH-MWCNTs) were investigated in a diode configuration using the time-of-flight (TOF) photocurrent method. While the room temperature hole mobility in pure MEH-PPV films was non-dispersive with positive field dependent mobility, MEH-PPV: COOH-MWCNT blended devices exhibited dispersive transport and negative field dependent mobility. This indicates that the hole mobility in this composite is influenced by positional disorder caused by the presence of COOH-MWCNTs in the MEH-PPV matrix. These results strongly suggest that the distribution of COOH-MWCNTs optimising in the organic matrix is important for charge transport in the high mobility nanotube component to be activated, when used in hybrid material systems.

AB - The hole transport properties of poly(2-methoxy, 5-(2'-ethyl-hexoxy)-p-phenylene vinylene) (MEH-PPV) blended with acid oxidized multiwall carbon nanotubes (COOH-MWCNTs) were investigated in a diode configuration using the time-of-flight (TOF) photocurrent method. While the room temperature hole mobility in pure MEH-PPV films was non-dispersive with positive field dependent mobility, MEH-PPV: COOH-MWCNT blended devices exhibited dispersive transport and negative field dependent mobility. This indicates that the hole mobility in this composite is influenced by positional disorder caused by the presence of COOH-MWCNTs in the MEH-PPV matrix. These results strongly suggest that the distribution of COOH-MWCNTs optimising in the organic matrix is important for charge transport in the high mobility nanotube component to be activated, when used in hybrid material systems.

KW - electric-field dependence

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KW - films

KW - morphology

KW - MEH-PPV

KW - drift mobility

KW - conjugated polymers

KW - charge-transport

KW - dispersive hole transport

KW - polymer

KW - carbon nanotube composites

U2 - 10.1088/0957-4484/22/26/265711

DO - 10.1088/0957-4484/22/26/265711

M3 - Article

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JO - Nanotechnology

JF - Nanotechnology

SN - 0957-4484

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