Journal of Physical Chemistry B, volume 104, issue 26, pages 6112-6123

Optical Nonlinearities and Ultrafast Carrier Dynamics in Semiconductor Nanocrystals

1
 
Chemical Science and Technology Division, CST-6, MS-J585, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
Publication typeJournal Article
Publication date2000-06-06
Quartile SCImago
Q1
Quartile WOS
Q3
Impact factor3.3
ISSN15206106, 15205207
Materials Chemistry
Surfaces, Coatings and Films
Physical and Theoretical Chemistry
Abstract
Femtosecond transient absorption in the visible and infrared spectral ranges has been applied to study carrier dynamics and mechanisms for resonant optical nonlinearities in CdSe nanocrystals (NCs) with a variety of surface passivations. Sequential filling of the 1S, 1P, and 1D atomic-like electron orbitals, governed by Fermi statistics, is clearly observed in the NC bleaching spectra recorded at progressively higher pump intensities. We observe that electron−hole (e−h) spatial separation strongly affects electron intraband dynamics. Such dependence indicates a nonphonon energy relaxation mechanism involving e−h interactions. A strong difference in electron and hole relaxation behavior in the stage following initial intraband relaxation is observed. In contrast to electron relaxation, which is sensitive to the quality of surface passivation (i.e., is affected by trapping at surface defects), depopulation dynamics of the initially-excited hole states are identical in NCs with different surface properties, ...

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Klimov V. I. Optical Nonlinearities and Ultrafast Carrier Dynamics in Semiconductor Nanocrystals // Journal of Physical Chemistry B. 2000. Vol. 104. No. 26. pp. 6112-6123.
GOST all authors (up to 50) Copy
Klimov V. I. Optical Nonlinearities and Ultrafast Carrier Dynamics in Semiconductor Nanocrystals // Journal of Physical Chemistry B. 2000. Vol. 104. No. 26. pp. 6112-6123.
RIS |
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RIS Copy
TY - JOUR
DO - 10.1021/jp9944132
UR - https://doi.org/10.1021/jp9944132
TI - Optical Nonlinearities and Ultrafast Carrier Dynamics in Semiconductor Nanocrystals
T2 - Journal of Physical Chemistry B
AU - Klimov, Victor I.
PY - 2000
DA - 2000/06/06 00:00:00
PB - American Chemical Society (ACS)
SP - 6112-6123
IS - 26
VL - 104
SN - 1520-6106
SN - 1520-5207
ER -
BibTex |
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BibTex Copy
@article{2000_Klimov,
author = {Victor I. Klimov},
title = {Optical Nonlinearities and Ultrafast Carrier Dynamics in Semiconductor Nanocrystals},
journal = {Journal of Physical Chemistry B},
year = {2000},
volume = {104},
publisher = {American Chemical Society (ACS)},
month = {jun},
url = {https://doi.org/10.1021/jp9944132},
number = {26},
pages = {6112--6123},
doi = {10.1021/jp9944132}
}
MLA
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Klimov, Victor I.. “Optical Nonlinearities and Ultrafast Carrier Dynamics in Semiconductor Nanocrystals.” Journal of Physical Chemistry B, vol. 104, no. 26, Jun. 2000, pp. 6112-6123. https://doi.org/10.1021/jp9944132.
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