Schroeder, BC;
Rossbauer, S;
Kline, RJ;
Biniek, L;
Watkins, SE;
Anthopoulos, TD;
McCulloch, I;
(2014)
Benzotrithiophene Copolymers: Influence of Molecular Packing and Energy Levels on Charge Carrier Mobility.
Macromolecules
, 47
(9)
pp. 2883-2890.
10.1021/ma500163u.
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Abstract
The planar benzotrithiophene unit (BTT) was incorporated into four different donor polymers, and by systematically changing the nature and positioning of the solubilizing alkyl side chains along the conjugated backbone, the polymers’ frontier energy levels and optoelectronic properties were controlled. Reducing the steric hindrance along the polymer backbone lead to strong interchain aggregation and highly ordered thin films, achieving hole mobilities of 0.04 cm2 /(V s) in organic thin film transistors. In an attempt to increase the polymer’s processability and reduce chain aggregation, steric hindrance between alkyl side chains was exploited. As a result of the increased solubility, the film forming properties of the polymer could be improved, but at the cost of reduced hole mobilities in OFET devices, due to the lack of long-range order in the polymer films.
| Type: | Article |
|---|---|
| Title: | Benzotrithiophene Copolymers: Influence of Molecular Packing and Energy Levels on Charge Carrier Mobility |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1021/ma500163u |
| Publisher version: | https://doi.org/10.1021/ma500163u |
| Language: | English |
| Additional information: | © ACS AuthorChoice under the CC BY license (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
| Keywords: | science & technology, physical sciences, polymer science, regioregular poly(3-hexylthiophene), performance, polythiophenes, transistors, polymers, density |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10048361 |
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