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dc.contributor.author
Krieg, Franziska
dc.contributor.author
Sercel, Peter C.
dc.contributor.author
Burian, Max
dc.contributor.author
Andrusiv, Hordii
dc.contributor.author
Bodnarchuk, Maryna I.
dc.contributor.author
Stöferle, Thilo
dc.contributor.author
Mahrt, Rainer F.
dc.contributor.author
Naumenko, Denys
dc.contributor.author
Amenitsch, Heinz
dc.contributor.author
Rainò, Gabriele
dc.contributor.author
Kovalenko, Maksym V.
dc.date.accessioned
2021-02-02T14:24:50Z
dc.date.available
2021-01-22T09:08:28Z
dc.date.available
2021-02-02T14:24:50Z
dc.date.issued
2021-01-27
dc.identifier.issn
2374-7951
dc.identifier.other
10.1021/acscentsci.0c01153
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/464666
dc.identifier.doi
10.3929/ethz-b-000464666
dc.description.abstract
Ligand-capped nanocrystals (NCs) of lead halide perovskites, foremost fully inorganic CsPbX3 NCs, are the latest generation of colloidal semiconductor quantum dots. They offer a set of compelling characteristics—large absorption cross section, as well as narrow, fast, and efficient photoluminescence with long exciton coherence times—rendering them attractive for applications in light-emitting devices and quantum optics. Monodisperse and shape-uniform, broadly size-tunable, scalable, and robust NC samples are paramount for unveiling their basic photophysics, as well as for putting them into use. Thus far, no synthesis method fulfilling all these requirements has been reported. For instance, long-chain zwitterionic ligands impart the most durable surface coating, but at the expense of reduced size uniformity of the as-synthesized colloid. In this work, we demonstrate that size-selective precipitation of CsPbBr3 NCs coated with a long-chain sulfobetaine ligand, namely, 3-(N,N-dimethyloctadecylammonio)-propanesulfonate, yields monodisperse and sizable fractions (>100 mg inorganic mass) with the mean NC size adjustable in the range between 3.5 and 16 nm and emission peak wavelength between 479 and 518 nm. We find that all NCs exhibit an oblate cuboidal shape with the aspect ratio of 1.2 × 1.2 × 1. We present a theoretical model (effective mass/k·p) that accounts for the anisotropic NC shape and describes the size dependence of the first and second excitonic transition in absorption spectra and explains room-temperature exciton lifetimes. We also show that uniform zwitterion-capped NCs readily form long-range ordered superlattices upon solvent evaporation. In comparison to more conventional ligand systems (oleic acid and oleylamine), supercrystals of zwitterion-capped NCs exhibit larger domain sizes and lower mosaicity. Both kinds of supercrystals exhibit superfluorescence at cryogenic temperatures—accelerated collective emission arising from the coherent coupling of the emitting dipoles.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
ACS Publications
en_US
dc.rights.uri
http://rightsstatements.org/page/InC-NC/1.0/
dc.title
Monodisperse Long-Chain Sulfobetaine-Capped CsPbBr3 Nanocrystals and Their Superfluorescent Assemblies
en_US
dc.type
Review Article
dc.rights.license
In Copyright - Non-Commercial Use Permitted
dc.date.published
2020-12-29
ethz.journal.title
ACS Central Science
ethz.journal.volume
7
en_US
ethz.journal.issue
1
en_US
ethz.journal.abbreviated
ACS Cent. Sci.
ethz.pages.start
135
en_US
ethz.pages.end
144
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.identifier.pubmed
7845019
ethz.publication.place
Washington, DC
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
en_US
ethz.date.deposited
2021-01-22T09:08:35Z
ethz.source
FORM
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2021-02-02T14:25:05Z
ethz.rosetta.lastUpdated
2022-03-29T05:03:12Z
ethz.rosetta.versionExported
true
ethz.COinS
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