Journal of Physical Chemistry A, volume 102, issue 28, pages 5652-5658
Interfacial Carriers Dynamics of CdS Nanoparticles
Publication type: Journal Article
Publication date: 1998-04-11
Journal:
Journal of Physical Chemistry A
Q2
Q2
SJR: 0.604
CiteScore: 5.2
Impact factor: 2.7
ISSN: 10895639, 15205215
Physical and Theoretical Chemistry
Abstract
The relaxation dynamics of charge carriers in 4 nm CdS colloidal quantum dots are studied by means of picosecond time-resolved fluorescence and femtosecond transient absorption experiments. We also studied the effects of the adsorption of viologen derivatives as electron acceptors on the surface of these particles. From these experimental measurements, we reached a model of the electron-hole dynamics in these nanoparticles consistent with previous proposals. In particular, we have confirmed that the electron trapping in these particles is slower than the hole trapping (30 ps versus a few picoseconds). After excitation, rapid formation of an optical hole (bleach) within the lowest energy exciton (band gap) absorption region appears. The maximum of the bleaching band is red-shifted by 20 meV in 2.5 ps, and the bleach intensity recovers in 30 ps. Upon the adsorption of electron acceptors, the rate of the red shift of the optical hole is not affected while the bleach recovery time is reduced to a few picoseco...
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Logunov S. et al. Interfacial Carriers Dynamics of CdS Nanoparticles // Journal of Physical Chemistry A. 1998. Vol. 102. No. 28. pp. 5652-5658.
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Logunov S., Green T., Marguet S., El-Sayed M. A. Interfacial Carriers Dynamics of CdS Nanoparticles // Journal of Physical Chemistry A. 1998. Vol. 102. No. 28. pp. 5652-5658.
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TY - JOUR
DO - 10.1021/jp980387g
UR - https://doi.org/10.1021/jp980387g
TI - Interfacial Carriers Dynamics of CdS Nanoparticles
T2 - Journal of Physical Chemistry A
AU - Logunov, S
AU - Green, T.
AU - Marguet, S
AU - El-Sayed, Mostafa A.
PY - 1998
DA - 1998/04/11
PB - American Chemical Society (ACS)
SP - 5652-5658
IS - 28
VL - 102
SN - 1089-5639
SN - 1520-5215
ER -
Cite this
BibTex (up to 50 authors)
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@article{1998_Logunov,
author = {S Logunov and T. Green and S Marguet and Mostafa A. El-Sayed},
title = {Interfacial Carriers Dynamics of CdS Nanoparticles},
journal = {Journal of Physical Chemistry A},
year = {1998},
volume = {102},
publisher = {American Chemical Society (ACS)},
month = {apr},
url = {https://doi.org/10.1021/jp980387g},
number = {28},
pages = {5652--5658},
doi = {10.1021/jp980387g}
}
Cite this
MLA
Copy
Logunov, S., et al. “Interfacial Carriers Dynamics of CdS Nanoparticles.” Journal of Physical Chemistry A, vol. 102, no. 28, Apr. 1998, pp. 5652-5658. https://doi.org/10.1021/jp980387g.