Title
Electronic structure of positive and negative polarons in functionalized dithienylthiazolo[5,4-d]thiazoles : a combined EPR and DFT study Electronic structure of positive and negative polarons in functionalized dithienylthiazolo[5,4-d]thiazoles : a combined EPR and DFT study
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Cambridge ,
Subject
Physics
Chemistry
Source (journal)
Physical chemistry, chemical physics / Chemical Society [London] - Cambridge, 1999, currens
Volume/pages
16(2014) :21 , p. 10032-10040
ISSN
1463-9076
1463-9084
ISI
000335924800030
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
2,5-Dithienylthiazolo[5,4-d]thiazole (DTTzTz) derivatives have high potential for solution-processed organic field-effect transistors and solar cells, both as electron acceptors and donors. Here, the electronic structure of positive and negative radicals (polarons) of two functionalized DTTzTz materials is studied using multi-frequency and multi-resonance electron paramagnetic resonance (EPR) in combination with density functional theory (DFT). It is shown that the negative and positive DTTzTz polarons can be distinguished on the basis of their characteristic EPR parameters. The chemically induced polarons are compared to light-generated states observed in a blend of one of the DTTzTz derivatives with a donor polymer. The study gives in-depth information about the spread of the electron or hole in the DTTzTz molecules.
E-info
https://repository.uantwerpen.be/docman/iruaauth/03ca15/4877688.pdf
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