Journal of Applied Physics, volume 113, issue 18, pages 184306
Surface states effect on photoluminescence of CdS colloidal nanocrystals
A V Katsaba
1
,
S A Ambrozevich
1
,
V. V. Fedyanin
1
,
A. N. LOBANOV
1
,
V S Krivobok
1
,
R B Vasiliev
2
,
I G Samatov
2
2
Faculty of Material Science, M.V. Lomonosov Moscow State University, Vorob'evy Gory, 1, Moscow, 119991, Russian Federation 2
|
Publication type: Journal Article
Publication date: 2013-05-10
Journal:
Journal of Applied Physics
Q2
Q2
SJR: 0.649
CiteScore: 5.4
Impact factor: 2.7
ISSN: 00218979, 10897550
General Physics and Astronomy
Abstract
CdS colloidal nanocrystals with an average size of 4.5 nm and oleic acid as surfactant were studied using photoluminescence spectroscopy and time-correlated single photon counting technique at different temperatures. Observed spectra revealed three thermally activated luminescence bands at 2.15, 1.76, and 1.37 eV in addition to conventional band edge recombination of the nanocrystals. We present a kinetic model based on concept of single emitters which quantitatively describes the luminescence of the ensemble of the nanocrystals in the temperature range 10–300 K. We determined activation energies (18.2 and 8.6 meV) for transitions responsible for the luminescence. The 1.76 eV band most probably emerges from the intrinsic defects on the surface of CdS, whereas bands at 2.15 and 1.37 eV result from the influence of oleic acid bonded to the surface of the nanocrystals.
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Katsaba A. V. et al. Surface states effect on photoluminescence of CdS colloidal nanocrystals // Journal of Applied Physics. 2013. Vol. 113. No. 18. p. 184306.
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Katsaba A. V., Ambrozevich S. A., VITUKHNOVSKY A. G., Fedyanin V. V., LOBANOV A. N., Krivobok V. S., Vasiliev R. B., Samatov I. G. Surface states effect on photoluminescence of CdS colloidal nanocrystals // Journal of Applied Physics. 2013. Vol. 113. No. 18. p. 184306.
Cite this
RIS
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TY - JOUR
DO - 10.1063/1.4804255
UR - https://doi.org/10.1063/1.4804255
TI - Surface states effect on photoluminescence of CdS colloidal nanocrystals
T2 - Journal of Applied Physics
AU - Katsaba, A V
AU - Ambrozevich, S A
AU - VITUKHNOVSKY, A. G.
AU - Fedyanin, V. V.
AU - LOBANOV, A. N.
AU - Krivobok, V S
AU - Vasiliev, R B
AU - Samatov, I G
PY - 2013
DA - 2013/05/10
PB - AIP Publishing
SP - 184306
IS - 18
VL - 113
SN - 0021-8979
SN - 1089-7550
ER -
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BibTex (up to 50 authors)
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@article{2013_Katsaba,
author = {A V Katsaba and S A Ambrozevich and A. G. VITUKHNOVSKY and V. V. Fedyanin and A. N. LOBANOV and V S Krivobok and R B Vasiliev and I G Samatov},
title = {Surface states effect on photoluminescence of CdS colloidal nanocrystals},
journal = {Journal of Applied Physics},
year = {2013},
volume = {113},
publisher = {AIP Publishing},
month = {may},
url = {https://doi.org/10.1063/1.4804255},
number = {18},
pages = {184306},
doi = {10.1063/1.4804255}
}
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Katsaba, A. V., et al. “Surface states effect on photoluminescence of CdS colloidal nanocrystals.” Journal of Applied Physics, vol. 113, no. 18, May. 2013, p. 184306. https://doi.org/10.1063/1.4804255.