dc.contributor.author
Steyrleuthner, Robert
dc.contributor.author
Zhang, Yuexing
dc.contributor.author
Zhang, Lei
dc.contributor.author
Kraffert, Felix
dc.contributor.author
Cherniawski, Benjamin P.
dc.contributor.author
Bittl, Robert
dc.contributor.author
Briseno, Alejandro L.
dc.contributor.author
Bredas, Jean-Luc
dc.contributor.author
Behrends, Jan
dc.date.accessioned
2018-06-08T11:09:30Z
dc.date.available
2018-02-27T11:51:12.074Z
dc.identifier.uri
https://refubium.fu-berlin.de/handle/fub188/21712
dc.identifier.uri
http://dx.doi.org/10.17169/refubium-25000
dc.description.abstract
We investigate the delocalization of holes in the semicrystalline conjugated
polymer poly(2,5-bis(3-alkylthiophene-2-yl)thieno[3,2-b]thiophene) (PBTTT) by
directly measuring the hyperfine coupling between photogenerated polarons and
bound nuclear spins using electron nuclear double resonance spectroscopy. An
extrapolation of the corresponding oligomer spectra reveals that charges tend
to delocalize over 4.0–4.8 nm with delocalization strongly dependent on
molecular order and crystallinity of the PBTTT polymer thin films. Density
functional theory calculations of hyperfine couplings confirm that long-range
corrected functionals appropriately describe the change in coupling strength
with increasing oligomer size and agree well with the experimentally measured
polymer limit. Our discussion presents general guidelines illustrating the
various pitfalls and opportunities when deducing polaron localization lengths
from hyperfine coupling spectra of conjugated polymers.
en
dc.format.extent
13 Seiten
dc.rights.uri
http://www.rsc.org/journals-books-databases/open-access/green-open-access/
dc.subject.ddc
500 Naturwissenschaften und Mathematik::530 Physik
dc.subject.ddc
500 Naturwissenschaften und Mathematik::540 Chemie
dc.title
Impact of morphology on polaron delocalization in a semicrystalline conjugated
polymer
dc.type
Wissenschaftlicher Artikel
dcterms.bibliographicCitation
Physical Chemistry Chemical Physics. - 19 (2017), 5, S.3627-3639
dc.identifier.sepid
61485
dcterms.bibliographicCitation.doi
10.1039/c6cp07485e
dcterms.bibliographicCitation.url
http://dx.doi.org/10.1039/C6CP07485E
refubium.affiliation
Physik
de
refubium.affiliation.other
Institut für Experimentalphysik
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refubium.funding
OpenAccess Publikation in Allianzlizenz
refubium.mycore.fudocsId
FUDOCS_document_000000029131
refubium.resourceType.isindependentpub
no
refubium.mycore.derivateId
FUDOCS_derivate_000000009471
dcterms.accessRights.openaire
open access
dcterms.isPartOf.issn
1463-9076