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dc.contributor.author
Anantharaman, Surendra B.
dc.contributor.author
Kohlbrecher, Joachim
dc.contributor.author
Rainò, Gabriele
dc.contributor.author
Yakunin, Sergii
dc.contributor.author
Stöferle, Thilo
dc.contributor.author
Patel, Jay
dc.contributor.author
Kovalenko, Maksym V.
dc.contributor.author
Mahrt, Rainer F.
dc.contributor.author
Nüesch, Frank A.
dc.contributor.author
Heier, Jakob
dc.date.accessioned
2021-03-22T09:15:19Z
dc.date.available
2021-01-20T12:07:51Z
dc.date.available
2021-01-20T13:29:10Z
dc.date.available
2021-03-22T09:15:19Z
dc.date.issued
2021-02-17
dc.identifier.issn
2198-3844
dc.identifier.other
10.1002/advs.201903080
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/464000
dc.identifier.doi
10.3929/ethz-b-000464000
dc.description.abstract
Supramolecular assemblies from organic dyes forming J-aggregates are known to exhibit narrowband photoluminescence with full-width at half maximum of approximate to 9 nm (260 cm(-1)). Applications of these high color purity emitters, however, are hampered by the rather low photoluminescence quantum yields reported for cyanine J-aggregates, even when formed in solution. Here, it is demonstrated that cyanine J-aggregates can reach an order of magnitude higher photoluminescence quantum yield (increase from 5% to 60%) in blend solutions of water and alkylamines at room temperature. By means of time-resolved photoluminescence studies, an increase in the exciton lifetime as a result of the suppression of non-radiative processes is shown. Small-angle neutron scattering studies suggest a necessary condition for the formation of such highly emissive J-aggregates: the presence of a sharp water/amine interface for J-aggregate assembly and the coexistence of nanoscale-sized water and amine domains to restrict the J-aggregate size and solubilize monomers, respectively.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Wiley
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.subject
exciton lifetime
en_US
dc.subject
J‐aggregates
en_US
dc.subject
Microemulsions
en_US
dc.subject
photoluminescence quantum yield
en_US
dc.subject
radiative excitons
en_US
dc.title
Enhanced Room-Temperature Photoluminescence Quantum Yield in Morphology Controlled J-Aggregates
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
dc.date.published
2021-01-04
ethz.journal.title
Advanced Science
ethz.journal.volume
8
en_US
ethz.journal.issue
4
en_US
ethz.journal.abbreviated
Adv. Sci.
ethz.pages.start
1903080
en_US
ethz.size
10 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Weinheim
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02020 - Dep. Chemie und Angewandte Biowiss. / Dep. of Chemistry and Applied Biosc.::02513 - Laboratorium für Anorganische Chemie / Laboratory of Inorganic Chemistry::03934 - Kovalenko, Maksym / Kovalenko, Maksym
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02020 - Dep. Chemie und Angewandte Biowiss. / Dep. of Chemistry and Applied Biosc.::02513 - Laboratorium für Anorganische Chemie / Laboratory of Inorganic Chemistry::03934 - Kovalenko, Maksym / Kovalenko, Maksym
ethz.date.deposited
2021-01-20T12:07:54Z
ethz.source
WOS
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2021-03-22T09:15:29Z
ethz.rosetta.lastUpdated
2023-02-06T21:34:56Z
ethz.rosetta.versionExported
true
ethz.COinS
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