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Influence of Crosslinking on Charge Carrier Mobility in Crosslinkable Polyfluorene Derivatives

Title data

Kahle, Frank-Julian ; Bauer, Irene ; Strohriegl, Peter ; Köhler, Anna:
Influence of Crosslinking on Charge Carrier Mobility in Crosslinkable Polyfluorene Derivatives.
In: Journal of Polymer Science Part B: Polymer Physics. Vol. 55 (2017) Issue 1 . - pp. 112-120.
ISSN 1099-0488
DOI: https://doi.org/10.1002/polb.24259

Abstract in another language

Carrier mobility is a key parameter for the application of conjugated polymers. In this work, a series of polyfluorenes (PF2/6) with different fractions of crosslinkable acrylate groups is investigated. Mobility measurements are carried out to assess the influence of crosslinking with different photoinitiators on the performance of the material. For the regime of low to medium charge carrier density, relevant for OLEDs and OPVs, we used a novel technique based on the injection of charge carriers from the electrodes of an optoelectronic device: MIS-CELIV (MIS: metal-insulator-semiconductor). For large charge carrier densities we performed OFET measurements. We find that using optimized conditions crosslinking does not influence the hole mobility in the investigated system. Furthermore, we demonstrate that the crosslinking process may be triggered solely by thermal activation and UV-illumination without the need of any initiator. Thus, densely crosslinked networks are obtained without the formation of undesired decomposition products from added photoinitiator.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: free radical polymerization; acrylate; MIS-CELIV; photoinitiator; polyfluorene (PF2/6)
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Lehrstuhl Experimentalphysik II - Optoelektronik weicher Materie > Lehrstuhl Experimentalphysik II - Optoelektronik weicher Materie - Univ.-Prof. Dr. Anna Köhler
Faculties
Faculties > Faculty of Mathematics, Physics und Computer Science
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Lehrstuhl Experimentalphysik II - Optoelektronik weicher Materie
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 20 Jan 2017 10:32
Last Modified: 20 Jan 2017 10:32
URI: https://eref.uni-bayreuth.de/id/eprint/35691