Journal of Chemical Physics, volume 125, issue 18, pages 184709

Exciton-phonon coupling and disorder in the excited states of CdSe colloidal quantum dots

Mayrose R Salvador 1
Matthew W Graham 1
1
 
University of Toronto Lash-Miller Chemical Laboratories, , 80 St. George Street, Toronto, Ontario M5S 3H6 Canada; Center for Quantum Information and Quantum Control, , Toronto, Ontario M5S 3H6, Canada; and Institute for Optical Sciences, , Toronto, Ontario, M5S 3H6, Canada
Publication typeJournal Article
Publication date2006-11-10
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor4.4
ISSN00219606, 10897690
Physical and Theoretical Chemistry
General Physics and Astronomy
Abstract

We study the origin of the spectral line shape in colloidal CdSe nanocrystal quantum dots. The three-pulse photon echo peak shift (3PEPS) data reveal a temperature-independent fast decay, obscuring the quantification of the homogeneous linewidth. The optical gap and Stokes shift are found to have an anomalous behavior with temperature, which is size, capping group, and surrounding polymer matrix independent. Using these results and combining them with simulations, we discuss the role of exciton-phonon coupling, static inhomogeneity, exciton fine structure, and exciton state disorder in the linewidth of the nanocrystal. In particular, our analysis shows that the disorder due to surface imperfections and finite temperature effects, as well as the relaxation within the fine structure, can have significant impact on the steady-state absorption spectrum, 3PEPS data, and dephasing processes.

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Salvador M. R., Graham M. W., Scholes G. D. Exciton-phonon coupling and disorder in the excited states of CdSe colloidal quantum dots // Journal of Chemical Physics. 2006. Vol. 125. No. 18. p. 184709.
GOST all authors (up to 50) Copy
Salvador M. R., Graham M. W., Scholes G. D. Exciton-phonon coupling and disorder in the excited states of CdSe colloidal quantum dots // Journal of Chemical Physics. 2006. Vol. 125. No. 18. p. 184709.
RIS |
Cite this
RIS Copy
TY - JOUR
DO - 10.1063/1.2363190
UR - https://doi.org/10.1063/1.2363190
TI - Exciton-phonon coupling and disorder in the excited states of CdSe colloidal quantum dots
T2 - Journal of Chemical Physics
AU - Salvador, Mayrose R
AU - Graham, Matthew W
AU - Scholes, Gregory D.
PY - 2006
DA - 2006/11/10 00:00:00
PB - American Institute of Physics (AIP)
SP - 184709
IS - 18
VL - 125
SN - 0021-9606
SN - 1089-7690
ER -
BibTex |
Cite this
BibTex Copy
@article{2006_Salvador,
author = {Mayrose R Salvador and Matthew W Graham and Gregory D. Scholes},
title = {Exciton-phonon coupling and disorder in the excited states of CdSe colloidal quantum dots},
journal = {Journal of Chemical Physics},
year = {2006},
volume = {125},
publisher = {American Institute of Physics (AIP)},
month = {nov},
url = {https://doi.org/10.1063/1.2363190},
number = {18},
pages = {184709},
doi = {10.1063/1.2363190}
}
MLA
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MLA Copy
Salvador, Mayrose R., et al. “Exciton-phonon coupling and disorder in the excited states of CdSe colloidal quantum dots.” Journal of Chemical Physics, vol. 125, no. 18, Nov. 2006, p. 184709. https://doi.org/10.1063/1.2363190.
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