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Local charge trapping in conjugated polymers resolved by scanning Kelvin probe microscopy

Local charge trapping in conjugated polymers resolved by scanning Kelvin probe microscopy
Local charge trapping in conjugated polymers resolved by scanning Kelvin probe microscopy
The microstructure of conjugated polymers is heterogeneous on the length scale of individual polymer chains, but little is known about how this affects their electronic properties. Here we use scanning Kelvin probe microscopy with resolution-enhancing carbon nanotube tips to study charge transport on a 100 nm scale in a chain-extended, semicrystalline conjugated polymer. We show that the disordered grain boundaries between crystalline domains constitute preferential charge trapping sites and lead to variations on a 100 nm scale of the carrier concentration under accumulation conditions.
0031-9007
256803
Hallam, Toby
331daaac-2227-4316-ba6a-1be3d1ce42a3
Lee, MiJung
6d84a88a-e831-4982-a312-ef986bbab261
Zhao, Ni
adb2ee28-77bd-4c36-999f-2b136c382a06
Nandhakumar, Iris
e9850fe5-1152-4df8-8a26-ed44b5564b04
Kemerink, Martijn
d0a35abd-8cea-4e9f-b331-8b387895a569
Heeney, Martin
29360690-672c-4186-add3-f463f990e616
McCulloch, Iain
7cac4a7c-75ab-47da-85b7-0ae78f600ee0
Sirringhaus, Henning
98021341-1aa7-471e-a1e1-41674ffa27ac
Hallam, Toby
331daaac-2227-4316-ba6a-1be3d1ce42a3
Lee, MiJung
6d84a88a-e831-4982-a312-ef986bbab261
Zhao, Ni
adb2ee28-77bd-4c36-999f-2b136c382a06
Nandhakumar, Iris
e9850fe5-1152-4df8-8a26-ed44b5564b04
Kemerink, Martijn
d0a35abd-8cea-4e9f-b331-8b387895a569
Heeney, Martin
29360690-672c-4186-add3-f463f990e616
McCulloch, Iain
7cac4a7c-75ab-47da-85b7-0ae78f600ee0
Sirringhaus, Henning
98021341-1aa7-471e-a1e1-41674ffa27ac

Hallam, Toby, Lee, MiJung, Zhao, Ni, Nandhakumar, Iris, Kemerink, Martijn, Heeney, Martin, McCulloch, Iain and Sirringhaus, Henning (2009) Local charge trapping in conjugated polymers resolved by scanning Kelvin probe microscopy. Physical Review Letters, 103 (25), 256803. (doi:10.1103/PhysRevLett.103.256803).

Record type: Article

Abstract

The microstructure of conjugated polymers is heterogeneous on the length scale of individual polymer chains, but little is known about how this affects their electronic properties. Here we use scanning Kelvin probe microscopy with resolution-enhancing carbon nanotube tips to study charge transport on a 100 nm scale in a chain-extended, semicrystalline conjugated polymer. We show that the disordered grain boundaries between crystalline domains constitute preferential charge trapping sites and lead to variations on a 100 nm scale of the carrier concentration under accumulation conditions.

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Published date: 2009
Organisations: Faculty of Natural and Environmental Sciences, Chemistry, Electrochemistry

Identifiers

Local EPrints ID: 149335
URI: http://eprints.soton.ac.uk/id/eprint/149335
ISSN: 0031-9007
PURE UUID: 5c29cd32-ce5b-404c-af3d-e367ae468142
ORCID for Iris Nandhakumar: ORCID iD orcid.org/0000-0002-9668-9126

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Date deposited: 23 Jun 2010 12:24
Last modified: 01 Oct 2019 00:57

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