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dc.contributor.author
Bederak, Dmytro
dc.contributor.author
Balazs, Daniel M.
dc.contributor.author
Sukharevska, Nataliia V.
dc.contributor.author
Shulga, Artem G.
dc.contributor.author
Abdu-Aguye, Mustapha
dc.contributor.author
Dirin, Dmitry N.
dc.contributor.author
Kovalenko, Maksym V.
dc.contributor.author
Loi, Maria A.
dc.date.accessioned
2019-02-14T16:55:26Z
dc.date.available
2018-11-22T18:37:13Z
dc.date.available
2018-11-26T17:46:18Z
dc.date.available
2019-02-14T16:53:20Z
dc.date.available
2019-02-14T16:55:26Z
dc.date.issued
2018-12-28
dc.identifier.other
10.1021/acsanm.8b01696
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/305724
dc.identifier.doi
10.3929/ethz-b-000305724
dc.description.abstract
Capping colloidal quantum dots (CQDs) with atomic ligands is a powerful approach to tune their properties and improve the charge carrier transport in CQD solids. Efficient passivation of the CQD surface, which can be achieved with halide ligands, is crucial for application in optoelectronic devices. Heavier halides, i.e., I– and Br–, have been thoroughly studied as capping ligands in the last years, but passivation with fluoride ions has not received sufficient consideration. In this work, effective coating of PbS CQDs with fluoride ligands is demonstrated and compared to the results obtained with other halides. The electron mobility in field-effect transistors of PbS CQDs treated with different halides shows an increase with the size of the atomic ligand (from 3.9 × 10–4 cm2/(V s) for fluoride-treated to 2.1 × 10–2 cm2/(V s) for iodide-treated), whereas the hole mobility remains unchanged in the range between 1 × 10–5 cm2/(V s) and 10–4cm2/(V s). This leads to a relatively more pronounced p-type behavior of the fluoride- and chloride-treated films compared to the iodide-treated ones. Cl–- and F–-capped PbS CQDs solids were then implemented as p-type layer in solar cells; these devices showed similar performance to those prepared with 1,2-ethanedithiol in the same function. The relatively stronger p-type character of the fluoride- and chloride-treated PbS CQD films broadens the utility of such materials in optoelectronic devices.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
American Chemical Society
en_US
dc.rights.uri
http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subject
colloidal quantum dots
en_US
dc.subject
lead sulfide
en_US
dc.subject
halide ligands
en_US
dc.subject
charge transport
en_US
dc.subject
solar cells
en_US
dc.title
Comparing Halide Ligands in PbS Colloidal Quantum Dots for Field-Effect Transistors and Solar Cells
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
dc.date.published
2018-11-09
ethz.journal.title
ACS Applied Nano Materials
ethz.journal.volume
1
en_US
ethz.journal.issue
12
en_US
ethz.pages.start
6882
en_US
ethz.pages.end
6889
en_US
ethz.version.deposit
publishedVersion
en_US
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
2018-11-22T18:37:24Z
ethz.source
FORM
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2019-02-14T16:53:30Z
ethz.rosetta.lastUpdated
2019-02-14T16:55:35Z
ethz.rosetta.versionExported
true
ethz.COinS
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