Optics and Spectroscopy (English translation of Optika i Spektroskopiya), volume 115, issue 5, pages 651-659
Decay of electronic excitations in CdS and CdS/ZnS colloidal quantum dots: spectral and kinetic investigations
M. S. Smirnov
1
,
D.I. Staselko
2
,
O. V. Ovchinnikov
1
,
A.N. Latyshev
1
,
O. V. Buganov
3
,
S. A. Tikhomirov
3
,
A. S. Perepelitsa
1
2
Rozhdestvensky Optical Society, St. Petersburg, Russia
|
Publication type: Journal Article
Publication date: 2013-11-05
Quartile SCImago
Q4
Quartile WOS
Q4
Impact factor: 0.6
ISSN: 0030400X, 15626911
Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Abstract
Using the spectral methods of induced absorption, luminescence, and photostimulated luminescence flash, we have experimentally investigated processes of decay of electronic excitations in CdS colloidal quantum dots and in CdS/ZnS “core-shell” systems synthesized in gelatin by the sol-gel method. It has been shown that the decay of electronic excitations in colloidal quantum dots of this type is predominantly related to a fast localization of nonequilibrium charge carriers on surface defects and their subsequent recombination during times on the order of units and tens of picoseconds. The passage to core-shell systems eliminates, to a large extent, surface defects of the core, some of which are luminescence centers. However, upon using the sol-gel synthesis, a noticeable fraction of luminescence centers are formed in the interior of the CdS quantum dot, which, as well as in the case of CdS/ZnS systems, ensures localization of exciton, blocks its direct annihilation, and maintains recombination radiation.
Top-30
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Citations by publishers
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9 publications, 39.13%
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- We do not take into account publications without a DOI.
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- Statistics recalculated weekly.
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Smirnov M. S. et al. Decay of electronic excitations in CdS and CdS/ZnS colloidal quantum dots: spectral and kinetic investigations // Optics and Spectroscopy (English translation of Optika i Spektroskopiya). 2013. Vol. 115. No. 5. pp. 651-659.
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Smirnov M. S., Staselko D., Ovchinnikov O. V., Latyshev A., Buganov O. V., Tikhomirov S. A., Perepelitsa A. S. Decay of electronic excitations in CdS and CdS/ZnS colloidal quantum dots: spectral and kinetic investigations // Optics and Spectroscopy (English translation of Optika i Spektroskopiya). 2013. Vol. 115. No. 5. pp. 651-659.
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TY - JOUR
DO - 10.1134/s0030400x13110246
UR - https://doi.org/10.1134/s0030400x13110246
TI - Decay of electronic excitations in CdS and CdS/ZnS colloidal quantum dots: spectral and kinetic investigations
T2 - Optics and Spectroscopy (English translation of Optika i Spektroskopiya)
AU - Smirnov, M. S.
AU - Staselko, D.I.
AU - Ovchinnikov, O. V.
AU - Latyshev, A.N.
AU - Buganov, O. V.
AU - Tikhomirov, S. A.
AU - Perepelitsa, A. S.
PY - 2013
DA - 2013/11/05 00:00:00
PB - Pleiades Publishing
SP - 651-659
IS - 5
VL - 115
SN - 0030-400X
SN - 1562-6911
ER -
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@article{2013_Smirnov,
author = {M. S. Smirnov and D.I. Staselko and O. V. Ovchinnikov and A.N. Latyshev and O. V. Buganov and S. A. Tikhomirov and A. S. Perepelitsa},
title = {Decay of electronic excitations in CdS and CdS/ZnS colloidal quantum dots: spectral and kinetic investigations},
journal = {Optics and Spectroscopy (English translation of Optika i Spektroskopiya)},
year = {2013},
volume = {115},
publisher = {Pleiades Publishing},
month = {nov},
url = {https://doi.org/10.1134/s0030400x13110246},
number = {5},
pages = {651--659},
doi = {10.1134/s0030400x13110246}
}
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Smirnov, M. S., et al. “Decay of electronic excitations in CdS and CdS/ZnS colloidal quantum dots: spectral and kinetic investigations.” Optics and Spectroscopy (English translation of Optika i Spektroskopiya), vol. 115, no. 5, Nov. 2013, pp. 651-659. https://doi.org/10.1134/s0030400x13110246.