Journal of Luminescence, volume 257, pages 119669
Temperature effects and mechanism of IR luminescence of colloidal Ag2Se QDs passivated with 2-mercaptopropionic acid
Publication type: Journal Article
Publication date: 2023-05-01
Journal:
Journal of Luminescence
Quartile SCImago
Q2
Quartile WOS
Q2
Impact factor: 3.6
ISSN: 00222313
General Chemistry
Biochemistry
Biophysics
Atomic and Molecular Physics, and Optics
Condensed Matter Physics
Abstract
The paper presents the new luminescence regularities of hydrophilic colloidal Ag2Se quantum dots (QDs), passivated with 2-mercaptopropionic acid molecules. It was found that an increase in the selenium precursor concentration, as well as a decrease in the sample temperature to 80 K provides the luminescence enhancement in the long-wavelength band (840-890 nm) with simultaneous strong quenching in the short-wavelength band (715-720 nm). The Stokes shift analysis suggested that the short-wavelength luminescence peak arises as a result of radiative annihilation of an exciton, while the long-wavelength one arises due to radiative recombination at trap states. An analysis of the luminescence excitation spectra at both luminescence bands, luminescence decay curves along the luminescence spectrum, and temperature dependence of the luminescence intensity made it possible to present a scheme of the energy levels and transitions that determine the luminescence regularities of colloidal Ag2Se QDs.
Top-30
Citations by journals
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Russian Chemical Reviews
1 publication, 100%
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Autonomous Non-profit Organization Editorial Board of the journal Uspekhi Khimii
1 publication, 100%
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Grevtseva I. G. et al. Temperature effects and mechanism of IR luminescence of colloidal Ag2Se QDs passivated with 2-mercaptopropionic acid // Journal of Luminescence. 2023. Vol. 257. p. 119669.
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Grevtseva I. G., Ovchinnikov O., Smirnov M. S., Aslanov S., Derepko V. N., Perepelitsa A. S., Kondratenko T. Temperature effects and mechanism of IR luminescence of colloidal Ag2Se QDs passivated with 2-mercaptopropionic acid // Journal of Luminescence. 2023. Vol. 257. p. 119669.
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TY - JOUR
DO - 10.1016/j.jlumin.2023.119669
UR - https://doi.org/10.1016/j.jlumin.2023.119669
TI - Temperature effects and mechanism of IR luminescence of colloidal Ag2Se QDs passivated with 2-mercaptopropionic acid
T2 - Journal of Luminescence
AU - Grevtseva, Irina G.
AU - Ovchinnikov, O.V.
AU - Smirnov, M S
AU - Aslanov, S.V.
AU - Derepko, Violetta N
AU - Perepelitsa, Aleksey S
AU - Kondratenko, Tamara
PY - 2023
DA - 2023/05/01 00:00:00
PB - Elsevier
SP - 119669
VL - 257
SN - 0022-2313
ER -
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@article{2023_Grevtseva,
author = {Irina G. Grevtseva and O.V. Ovchinnikov and M S Smirnov and S.V. Aslanov and Violetta N Derepko and Aleksey S Perepelitsa and Tamara Kondratenko},
title = {Temperature effects and mechanism of IR luminescence of colloidal Ag2Se QDs passivated with 2-mercaptopropionic acid},
journal = {Journal of Luminescence},
year = {2023},
volume = {257},
publisher = {Elsevier},
month = {may},
url = {https://doi.org/10.1016/j.jlumin.2023.119669},
pages = {119669},
doi = {10.1016/j.jlumin.2023.119669}
}