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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 o...

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Bibliographic Details
Main Authors: Hallam, Toby (Author) , Lee, MiJung (Author) , Zhao, Ni (Author) , Nandhakumar, Iris (Author) , Kemerink, Martijn (Author) , Heeney, Martin (Author) , McCulloch, Iain (Author) , Sirringhaus, Henning (Author)
Format: Article (Journal)
Language:English
Published: 17 December 2009
In: Physical review letters
Year: 2009, Volume: 103, Issue: 25
ISSN:1079-7114
DOI:10.1103/PhysRevLett.103.256803
Online Access:Verlag, Volltext: https://doi.org/10.1103/PhysRevLett.103.256803
Verlag, Volltext: https://link.aps.org/doi/10.1103/PhysRevLett.103.256803
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Author Notes:Toby Hallam, MiJung Lee, Ni Zhao, Iris Nandhakumar, Martijn Kemerink, Martin Heeney, Iain McCulloch, and Henning Sirringhaus
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Summary: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.
Item Description:Gesehen am 16.12.2019
Physical Description:Online Resource
ISSN:1079-7114
DOI:10.1103/PhysRevLett.103.256803

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