Planells, M;
Schroeder, BC;
McCulloch, I;
(2014)
Effect of Chalcogen Atom Substitution on the Optoelectronic Properties in Cyclopentadithiophene Polymers.
Macromolecules
, 47
(17)
pp. 5889-5894.
10.1021/ma5014308.
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Abstract
We report the synthesis and characterization of a series of cyclopentadithiophene polymers containing thiophene, selenophene, and tellurophene as comonomers. The effect of the chalcogen atom has been studied by a range of techniques, including thermal, optical, electrochemical, and computational. The results showed that by increasing the size of the chalcogen atom, the optical band gap is reduced mainly due to a downshift in the LUMO energy level. In addition, the larger size also increases the intermolecular heteroatom−heteroatom interactions facilitating the formation of polymer aggregates. This led to not only a stronger red-shifted band in the UV−vis absorption spectrum as well as raise in the HOMO energy level but also a potential solubility issue for higher molecular weight polymers containing particularly tellurophene units.
| Type: | Article |
|---|---|
| Title: | Effect of Chalcogen Atom Substitution on the Optoelectronic Properties in Cyclopentadithiophene Polymers |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1021/ma5014308 |
| Publisher version: | https://doi.org/10.1021/ma5014308 |
| 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, 25th anniversary article, field-effect transistors, solar-cells, conjugated polymer, tellurophene, spintronics, performance, chemistry, decade |
| 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/10048358 |
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