Journal of Physical Chemistry C, volume 113, issue 16, pages 6511-6520

Size Dependence of the Spontaneous Emission Rate and Absorption Cross Section of CdSe and CdTe Quantum Dots

Publication typeJournal Article
Publication date2009-03-31
Quartile SCImago
Q1
Quartile WOS
Q2
Impact factor3.7
ISSN19327447, 19327455
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
Physical and Theoretical Chemistry
General Energy
Abstract
In this paper, the size dependence of the band gap, of the spontaneous emission rate, and of the absorption cross section of quantum dots is systematically investigated over a wide size range, using colloidal CdSe and CdTe QDs as model systems (diameters ranging from 1.2 to 8 nm and from 2 to 9.5 nm, respectively). The size dependence of the band gap is well-described by theoretical models, and is dominated by the quantum confinement contribution (1/d2 scaling). The spontaneous emission rate increases linearly with the emission frequency for both CdSe and CdTe QDs, in good agreement with theoretical predictions. By extrapolating the frequency dependence of the emission rates to the bulk band gap values, the exciton radiative lifetime in bulk CdSe and CdTe could be estimated for the first time (viz., 18 and 20 ns, respectively). Comparison between the empirical trends and theoretical predictions provides new fundamental insights into the size dependence of the 1S(e)1S3/2(h) oscillator strengths of QDs, bot...

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GOST |
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GOST Copy
De Mello Donega C., Koole R. Size Dependence of the Spontaneous Emission Rate and Absorption Cross Section of CdSe and CdTe Quantum Dots // Journal of Physical Chemistry C. 2009. Vol. 113. No. 16. pp. 6511-6520.
GOST all authors (up to 50) Copy
De Mello Donega C., Koole R. Size Dependence of the Spontaneous Emission Rate and Absorption Cross Section of CdSe and CdTe Quantum Dots // Journal of Physical Chemistry C. 2009. Vol. 113. No. 16. pp. 6511-6520.
RIS |
Cite this
RIS Copy
TY - JOUR
DO - 10.1021/jp811329r
UR - https://doi.org/10.1021/jp811329r
TI - Size Dependence of the Spontaneous Emission Rate and Absorption Cross Section of CdSe and CdTe Quantum Dots
T2 - Journal of Physical Chemistry C
AU - Koole, Rolf
AU - De Mello Donega, C.
PY - 2009
DA - 2009/03/31 00:00:00
PB - American Chemical Society (ACS)
SP - 6511-6520
IS - 16
VL - 113
SN - 1932-7447
SN - 1932-7455
ER -
BibTex |
Cite this
BibTex Copy
@article{2009_De Mello Donega,
author = {Rolf Koole and C. De Mello Donega},
title = {Size Dependence of the Spontaneous Emission Rate and Absorption Cross Section of CdSe and CdTe Quantum Dots},
journal = {Journal of Physical Chemistry C},
year = {2009},
volume = {113},
publisher = {American Chemical Society (ACS)},
month = {mar},
url = {https://doi.org/10.1021/jp811329r},
number = {16},
pages = {6511--6520},
doi = {10.1021/jp811329r}
}
MLA
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MLA Copy
De Mello Donega, C., and Rolf Koole. “Size Dependence of the Spontaneous Emission Rate and Absorption Cross Section of CdSe and CdTe Quantum Dots.” Journal of Physical Chemistry C, vol. 113, no. 16, Mar. 2009, pp. 6511-6520. https://doi.org/10.1021/jp811329r.
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