Journal of Luminescence, volume 179, pages 413-419
The size dependence recombination luminescence of hydrophilic colloidal CdS quantum dots in gelatin
O.V. Ovchinnikov
1
,
Mikhail Smirnov
1
,
N V Korolev
1
,
P. A. GOLOVINSKI
2, 3
,
A. G. VITUKHNOVSKY
2, 4, 5
Publication type: Journal Article
Publication date: 2016-11-01
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 recombination photoluminescence (PL) properties of hydrophilic colloidal CdS quantum dots (QDs) dispersed in gelatin were investigated. The average size of QDs varies from 2.4 to 4.4 nm. The size dependence of the emission peak position is defined in the range from 1.65 to 2.27 eV. The PL decay (0.3–4·10 3 ns) is accompanied by the red shift of its maximum. It is interpreted as the radiative recombination via the donor-acceptor pairs. The analysis of the half-width and shape of the observed PL spectra was performed taking into account the QDs size distribution and the Coulomb interaction of donor and acceptor uniformly distributed in QD volume. The deviation of the theoretical PL spectra from experimental data on the half-width was determined, which amounted of the order 0.4 eV. It is concluded that to describe the PL spectra of CdS QDs it is necessary to consider a different degree of localization of the wave functions and the variation of the binding energy of the donor and acceptor versus their depth in the QD volume.
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Ovchinnikov O. et al. The size dependence recombination luminescence of hydrophilic colloidal CdS quantum dots in gelatin // Journal of Luminescence. 2016. Vol. 179. pp. 413-419.
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Ovchinnikov O., Smirnov M., Korolev N. V., GOLOVINSKI P. A., VITUKHNOVSKY A. G. The size dependence recombination luminescence of hydrophilic colloidal CdS quantum dots in gelatin // Journal of Luminescence. 2016. Vol. 179. pp. 413-419.
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TY - JOUR
DO - 10.1016/j.jlumin.2016.07.016
UR - https://doi.org/10.1016/j.jlumin.2016.07.016
TI - The size dependence recombination luminescence of hydrophilic colloidal CdS quantum dots in gelatin
T2 - Journal of Luminescence
AU - Ovchinnikov, O.V.
AU - Smirnov, Mikhail
AU - Korolev, N V
AU - GOLOVINSKI, P. A.
AU - VITUKHNOVSKY, A. G.
PY - 2016
DA - 2016/11/01 00:00:00
PB - Elsevier
SP - 413-419
VL - 179
SN - 0022-2313
ER -
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@article{2016_Ovchinnikov,
author = {O.V. Ovchinnikov and Mikhail Smirnov and N V Korolev and P. A. GOLOVINSKI and A. G. VITUKHNOVSKY},
title = {The size dependence recombination luminescence of hydrophilic colloidal CdS quantum dots in gelatin},
journal = {Journal of Luminescence},
year = {2016},
volume = {179},
publisher = {Elsevier},
month = {nov},
url = {https://doi.org/10.1016/j.jlumin.2016.07.016},
pages = {413--419},
doi = {10.1016/j.jlumin.2016.07.016}
}
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