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Correlation of charge transport with structural order in highly ordered melt-crystallized poly(3-hexylthiophene) thin films

Title data

Singh, Chetan R. ; Gupta, Gaurav ; Lohwasser, Ruth H. ; Engmann, Sebastian ; Balko, Jens ; Thelakkat, Mukundan ; Thurn-Albrecht, Thomas ; Hoppe, Harald:
Correlation of charge transport with structural order in highly ordered melt-crystallized poly(3-hexylthiophene) thin films.
In: Journal of Polymer Science Part B: Polymer Physics. Vol. 51 (2013) Issue 12 . - pp. 943-951.
ISSN 1099-0488
DOI: https://doi.org/10.1002/polb.23297

Project information

Project financing: Deutsche Forschungsgemeinschaft

Abstract in another language

A series of well-defined poly(3-hexylthiophene)s (P3HT) of different molecular weight (MW) and high regioregularity was investigated for charge transport properties in as-cast and melt-crystallized films. The semicrystalline structure of the P3HT was characterized by X-ray scattering and Atomic force microscopy. Crystallization by cooling from the melt led to a substantial increase in crystallinity and a stronger alignment of the crystals in comparison to as-cast films. The increase in crystallinity went along with an increase in hole mobility of up to an order of magnitude as measured by the space charge limited current method. Additionally, the hole mobility depended on the long period of P3HT lamellae and consequently on the MW. In compliance with the long period, the charge carrier mobility first increased with the MW before decreasing again at the onset of chain folding.

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
Profile Fields
Profile Fields > Emerging Fields
Profile Fields > Emerging Fields > Energy Research and Energy Technology
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: 12 Apr 2016 09:02
Last Modified: 21 Jul 2016 07:12
URI: https://eref.uni-bayreuth.de/id/eprint/1171