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@ARTICLE{Raievska:890117,
author = {Raievska, Oleksandra and Stroyuk, Oleksandr and Dzhagan,
Volodymyr and Solonenko, Dmytro and Zahn, Dietrich R. T.},
title = {{U}ltra-small aqueous glutathione-capped {A}g–{I}n–{S}e
quantum dots: luminescence and vibrational properties},
journal = {RSC Advances},
volume = {10},
number = {69},
issn = {2046-2069},
address = {London},
publisher = {RSC Publishing},
reportid = {FZJ-2021-00706},
pages = {42178 - 42193},
year = {2020},
abstract = {We introduce a direct aqueous synthesis of luminescent 2-3
nm Ag-In-Se (AISe) quantum dots (QDs) capped by glutathione
(GSH) complexes, where sodium selenosulfate Na2SeSO3 is used
as a stable Se2- precursor. A series of size-selected AISe
QDs with distinctly different positions of absorption and PL
bands can be separated from the original QD ensembles by
using anti-solvent-induced size-selective precipitation. The
AISe-GSH QDs emit broadband PL with the band maximum varying
from 1.65 eV (750 nm) to 1.90 eV (650 nm) depending on the
average QD size and composition. The PL quantum yield varies
strongly with basic synthesis parameters (ratios of
constituents, Zn addition, duration of thermal treatment,
etc.) reaching $4\%$ for “core” AISe and $12\%$ for
“core/shell” AISe/ZnS QDs. The shape and position of PL
bands is interpreted in terms of the model of radiative
recombination of a self-trapped exciton. The AISe-GSH QDs
reveal phonon Raman spectra characteristic for small and
Ag-deficient tetragonal Ag-In-Se QDs. The ability of
ultra-small AISe QDs to support such "bulk-like" vibrations
can be used for future deeper insights into structural and
optical properties of this relatively new sort of QDs.},
cin = {IEK-11},
ddc = {540},
cid = {I:(DE-Juel1)IEK-11-20140314},
pnm = {113 - Methods and Concepts for Material Development
(POF3-113) / 530 - Science and Technology of Nanosystems
(POF3-500)},
pid = {G:(DE-HGF)POF3-113 / G:(DE-HGF)POF3-530},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000592897600023},
doi = {10.1039/D0RA07706B},
url = {https://juser.fz-juelich.de/record/890117},
}