Journal of Physical Chemistry B, volume 101, issue 46, pages 9463-9475

(CdSe)ZnS Core−Shell Quantum Dots:  Synthesis and Characterization of a Size Series of Highly Luminescent Nanocrystallites

Publication typeJournal Article
Publication date1997-11-01
Quartile SCImago
Q1
Quartile WOS
Q3
Impact factor3.3
ISSN15206106, 15205207
Materials Chemistry
Surfaces, Coatings and Films
Physical and Theoretical Chemistry
Abstract
We report a synthesis of highly luminescent (CdSe)ZnS composite quantum dots with CdSe cores ranging in diameter from 23 to 55 Å. The narrow photoluminescence (fwhm ≤ 40 nm) from these composite dots spans most of the visible spectrum from blue through red with quantum yields of 30−50% at room temperature. We characterize these materials using a range of optical and structural techniques. Optical absorption and photoluminescence spectroscopies probe the effect of ZnS passivation on the electronic structure of the dots. We use a combination of wavelength dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, small and wide angle X-ray scattering, and transmission electron microscopy to analyze the composite dots and determine their chemical composition, average size, size distribution, shape, and internal structure. Using a simple effective mass theory, we model the energy shift for the first excited state for (CdSe)ZnS and (CdSe)CdS dots with varying shell thickness. Finally, we characterize the growth of ZnS on CdSe cores as locally epitaxial and determine how the structure of the ZnS shell influences the photoluminescence properties.

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Dabbousi B. O. et al. (CdSe)ZnS Core−Shell Quantum Dots: Synthesis and Characterization of a Size Series of Highly Luminescent Nanocrystallites // Journal of Physical Chemistry B. 1997. Vol. 101. No. 46. pp. 9463-9475.
GOST all authors (up to 50) Copy
Dabbousi B. O., Rodrı́guez-Viejo J., Mikulec F. V., Heine J. R., Mattoussi H., Ober R., Jensen K. F., Bawendi M. G. (CdSe)ZnS Core−Shell Quantum Dots: Synthesis and Characterization of a Size Series of Highly Luminescent Nanocrystallites // Journal of Physical Chemistry B. 1997. Vol. 101. No. 46. pp. 9463-9475.
RIS |
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RIS Copy
TY - JOUR
DO - 10.1021/jp971091y
UR - https://doi.org/10.1021/jp971091y
TI - (CdSe)ZnS Core−Shell Quantum Dots: Synthesis and Characterization of a Size Series of Highly Luminescent Nanocrystallites
T2 - Journal of Physical Chemistry B
AU - Dabbousi, B O
AU - Ober, R.
AU - Mikulec, F V
AU - Heine, J R
AU - Jensen, K. F.
AU - Rodrı́guez-Viejo, J.
AU - Mattoussi, Hedi
AU - Bawendi, Moungi G.
PY - 1997
DA - 1997/11/01 00:00:00
PB - American Chemical Society (ACS)
SP - 9463-9475
IS - 46
VL - 101
SN - 1520-6106
SN - 1520-5207
ER -
BibTex |
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BibTex Copy
@article{1997_Dabbousi,
author = {B O Dabbousi and R. Ober and F V Mikulec and J R Heine and K. F. Jensen and J. Rodrı́guez-Viejo and Hedi Mattoussi and Moungi G. Bawendi},
title = {(CdSe)ZnS Core−Shell Quantum Dots: Synthesis and Characterization of a Size Series of Highly Luminescent Nanocrystallites},
journal = {Journal of Physical Chemistry B},
year = {1997},
volume = {101},
publisher = {American Chemical Society (ACS)},
month = {nov},
url = {https://doi.org/10.1021/jp971091y},
number = {46},
pages = {9463--9475},
doi = {10.1021/jp971091y}
}
MLA
Cite this
MLA Copy
Dabbousi, B. O., et al. “(CdSe)ZnS Core−Shell Quantum Dots: Synthesis and Characterization of a Size Series of Highly Luminescent Nanocrystallites.” Journal of Physical Chemistry B, vol. 101, no. 46, Nov. 1997, pp. 9463-9475. https://doi.org/10.1021/jp971091y.
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