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Cited by 31Photochemistry and Electron Transfer StudiesLuminescence and Fluorescent MaterialsSpectroscopy and Quantum Chemical Studies

Enhanced Room‐Temperature Photoluminescence Quantum Yield in Morphology Controlled J‐Aggregates

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Anantharaman, Surendra B., Kohlbrecher, Joachim, Rainò, Gabriele, Yakunin, Sergii, Stöferle, Thilo, Patel, Jay, Kovalenko, Maksym, Mahrt, Rainer F. +2 more·2021·Advanced Science
DOI 10.1002/advs.201903080PMC PMC7887577
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Abstract

Supramolecular assemblies from organic dyes forming J‐aggregates are known to exhibit narrowband photoluminescence with full‐width at half maximum of ≈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.

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Authors
Anantharaman, S. B., Kohlbrecher, J., Rainò, G., Yakunin, S., Stöferle, T., Patel, J., Kovalenko, M., Mahrt, R. F., Nüesch, F. A., & Heier, J.
Affiliations
  • École Polytechnique Fédérale de Lausanne (CH)
  • Paul Scherrer Institute (CH)
  • ETH Zurich (CH)
  • IBM Research - Zurich (CH)
  • Empa (CH)
Corresponding author
  • Anantharaman, Surendra B.
  • Heier, Jakob
ORCID
Venue
Advanced Science
Publisher
Wiley
Published
2021-01-04
Volume
8
Issue
4
Pages
1903080-1903080
ISSN
2198-3844 (ISSN-L)
DOI
10.1002/advs.201903080
PMC
PMC7887577
OpenAlex
W3120680686
Cited by
31
References
65
Citations by year
2026: 5 · 2025: 4 · 2024: 5 · 2023: 8 · 2022: 4 · 2021: 5
FWCI
3.29
Type
journal article
Language
en
Open access
Licence
Locations
  • Advanced Science (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Repository for Publications and Research Data (ETH Zurich) (publishedVersion, cc-by)
  • DORA Empa (Swiss Federal Laboratories for Materials Science and Technology (Empa)) (submittedVersion, cc-by)
  • DORA PSI (Paul Scherrer Institute) (submittedVersion, cc-by)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Infoscience (Ecole Polytechnique Fédérale de Lausanne) (submittedVersion, cc-by-nc-nd)
  • ETH Zürich Research Collection (cc-by)
Funders
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung (169695, 157135)
Topics
  • Physical Sciences › Chemistry › Physical and Theoretical Chemistry › Photochemistry and Electron Transfer Studies
  • Physical Sciences › Materials Science › Materials Chemistry › Luminescence and Fluorescent Materials
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Spectroscopy and Quantum Chemical Studies
Keywords
photoluminescence quantum yield, room-temperature emission, exciton lifetime, nonradiative processes, small-angle neutron scattering

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