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Crystalline vs Liquid Crystalline Perylene Bisimides : Improved Electron Mobility via Substituent Alteration

Title data

Muth, Mathis-Andreas ; Gupta, Gaurav ; Wicklein, André ; Carrasco-Orozco, Miguel ; Thurn-Albrecht, Thomas ; Thelakkat, Mukundan:
Crystalline vs Liquid Crystalline Perylene Bisimides : Improved Electron Mobility via Substituent Alteration.
In: The Journal of Physical Chemistry C. Vol. 118 (2014) Issue 1 . - pp. 92-102.
ISSN 1932-7455
DOI: https://doi.org/10.1021/jp4086602

Project information

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Project's official titleProject's id
Schwerpunktprogramm (SPP)No information

Project financing: Deutsche Forschungsgemeinschaft

Abstract in another language

Three solution processable n-type semiconducting perylene bisimides (PBI) with an unsymmetrical substitution pattern are evaluated in terms of their charge transport properties, morphology, and crystal structure. The nature of the substituents is varied from hydrophobic alkyl chains to hydrophilic oligoethyleneglycol (OEG) chains to control intermolecular interactions and to tune self-assembly properties of the compounds. A correlation of structure and morphology with charge transport properties is attempted. Bulk X-ray diffraction (XRD) data are indicative for a lamello-columnar packing motif in the case of PBI 1 and PBI 3 and a columnar hexagonal packing for PBI 2. Further, OEG chains induce liquid crystalline phases while the alkyl substituted compound is crystalline. In the amorphous state after film formation all three materials have a low electron mobility in the range of 10–5 cm2 V–1 s–1. After annealing in the ordered state the mobility of the liquid crystalline compounds increases by 2 orders of magnitude up to 7 × 10–3 cm2 V–1 s–1, while the mobility of the crystalline material decreases by a factor of 4.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Macromolecular Chemistry I
Research Institutions
Research Institutions > EU Research Projects
Research Institutions > EU Research Projects > LARGECELLS - Large-area Organic and Hybrid Solar Cells
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Professorship Applied Functional Polymers > Professorship Applied Functional Polymers - Univ.-Prof. Dr. Mukundan Thelakkat
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Professorship Applied Functional Polymers
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 540 Chemistry
Date Deposited: 25 Jun 2014 09:31
Last Modified: 21 Jul 2016 06:38
URI: https://eref.uni-bayreuth.de/id/eprint/1141