Dispersive hole transport in polymer: carbon nanotube composites

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

doi:10.1088/0957-4484/22/26/265711

Dispersive hole transport in polymer: carbon nanotube composites

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

Pure And Applied Chemistry

Research output: Contribution to journal › Article › peer-review

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 language	English
Article number	265711
Number of pages	6
Journal	Nanotechnology
Volume	22
Issue number	26
DOIs	https://doi.org/10.1088/0957-4484/22/26/265711
Publication status	Published - 1 Jul 2011

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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10.1088/0957-4484/22/26/265711

Cite this

@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 ",

author = "Inigo, {A. R.} and Henley, {S. J.} and Silva, {S. R. P.}",

year = "2011",

month = jul,

day = "1",

doi = "10.1088/0957-4484/22/26/265711",

language = "English",

volume = "22",

journal = "Nanotechnology",

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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

Y1 - 2011/7/1

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

KW - cells

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

SN - 0957-4484

VL - 22

JO - Nanotechnology

JF - Nanotechnology

IS - 26

M1 - 265711

ER -

Dispersive hole transport in polymer: carbon nanotube composites

Abstract

Keywords

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