UV-induced modulation of the conductivity of polyaniline: towards a photo-patternable charge injection layer for structured organic light emitting diodes

In macromolecular electronics the organic material should offerbesides the desired electronic propertiesthe possibility of lateral patterning. Here, we report on a novel polyaniline derivative bearing photosensitive N -formamide groups. UV illumination of this polymeric material leads to a decarbony...

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Bibliographic Details
Published in:Journal of materials chemistry 2012-01, Vol.22 (7), p.2922-2928
Main Authors: Griesser, Thomas, Radl, Simone Viola, Koepplmayr, Thomas, Wolfberger, Archim, Edler, Matthias, Pavitschitz, Andreas, Kratzer, Markus, Teichert, Christian, Rath, Thomas, Trimmel, Gregor, Schwabegger, Gnther, Simbrunner, Clemens, Sitter, Helmut, Kern, Wolfgang
Format: Article
Language:English
Subjects:
Charge injection
Conversion
Derivatives
Electrodes
Electronics
Modulation
Polyanilines
Thin films
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Summary:In macromolecular electronics the organic material should offerbesides the desired electronic propertiesthe possibility of lateral patterning. Here, we report on a novel polyaniline derivative bearing photosensitive N -formamide groups. UV illumination of this polymeric material leads to a decarbonylation reaction resulting in polyaniline which can be subsequently protonated to yield the conductive emeraldine salt. Due to the fact that the conductivity depends on the conversion of the photoreaction, a selective adjustment of the conductivity by means of UV light is feasible. These photo-induced conductivity changes were corroborated in thin films by conductive AFM measurements. Further, we demonstrate the versatility of this polymer with respect to a patterned modification of the conductivity as well as its application as a photo-patternable charge injection layer for structured OLEDs. This makes the new polymer an interesting candidate for electrodes and interconnects in various organic electronic devices. Patterns of different conductivity can be easily achieved in a new photosensitive polyaniline derivative.
ISSN:0959-9428
1364-5501
DOI:10.1039/c1jm14100g