Journal of Physical Chemistry B, volume 108, issue 44, pages 17119-17123
Colloidal ZnSe, ZnSe/ZnS, and ZnSe/ZnSeS Quantum Dots Synthesized from ZnO
Hsueh-Shih Chen
1
,
Bertrand Lo
1
,
Jen Yu Hwang
1
,
Gwo Yang Chang
1
,
CHIEN-MING CHEN
1
,
Shih Jung Tasi
1
,
Shian Jy Jassy Wang
1
1
Union Chemical Laboratories, Industrial Technology Research Institute, 321, Kuang Fu Rd. Sec.2, Hsin Chu, Taiwan 300, R.O.C.
|
Publication type: Journal Article
Publication date: 2004-10-08
Journal:
Journal of Physical Chemistry B
Q1
Q3
SJR: 0.760
CiteScore: 5.8
Impact factor: 2.8
ISSN: 15206106, 15205207, 10895647
Materials Chemistry
Surfaces, Coatings and Films
Physical and Theoretical Chemistry
Abstract
Colloidal ZnSe quantum dots were successfully synthesized from ZnO in a lauric acid/hexadecylamine mixture. X-ray diffraction patterns indicated that the ZnSe quantum dots possess a wurtzite structure. Transmission electron microscope images of the quantum dots showed that the average diameter are in the range of 25∼60 A. The size-dependent photoluminescence was controlled from 400 to 440 nm with the quantum yields of 6∼10% at room temperature. After passivation with 1.8 monolayer of ZnS overcoat by a traditional two-step method, the quantum yields of ZnSe/ZnS QDs are increased ∼4.5-fold (quantum yield ∼32%). An in-situ method of overcoating was done by directly injecting TOPS into the flask containing ZnSe, ZnO/lauric acid/hexadecylamine, and TOPSe. The photoluminescence quantum yields were improved ∼3.8-fold after introduction of 1.6 monolayer ZnSeS overcoat to the ZnSe QDs.
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Chen H. et al. Colloidal ZnSe, ZnSe/ZnS, and ZnSe/ZnSeS Quantum Dots Synthesized from ZnO // Journal of Physical Chemistry B. 2004. Vol. 108. No. 44. pp. 17119-17123.
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Chen H., Lo B., Hwang J. Yu., Chang G. Y., CHEN C., Tasi S. J., Wang S. J. J. Colloidal ZnSe, ZnSe/ZnS, and ZnSe/ZnSeS Quantum Dots Synthesized from ZnO // Journal of Physical Chemistry B. 2004. Vol. 108. No. 44. pp. 17119-17123.
Cite this
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TY - JOUR
DO - 10.1021/jp047035w
UR - https://doi.org/10.1021/jp047035w
TI - Colloidal ZnSe, ZnSe/ZnS, and ZnSe/ZnSeS Quantum Dots Synthesized from ZnO
T2 - Journal of Physical Chemistry B
AU - Chen, Hsueh-Shih
AU - Lo, Bertrand
AU - Hwang, Jen Yu
AU - Chang, Gwo Yang
AU - CHEN, CHIEN-MING
AU - Tasi, Shih Jung
AU - Wang, Shian Jy Jassy
PY - 2004
DA - 2004/10/08
PB - American Chemical Society (ACS)
SP - 17119-17123
IS - 44
VL - 108
SN - 1520-6106
SN - 1520-5207
SN - 1089-5647
ER -
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@article{2004_Chen,
author = {Hsueh-Shih Chen and Bertrand Lo and Jen Yu Hwang and Gwo Yang Chang and CHIEN-MING CHEN and Shih Jung Tasi and Shian Jy Jassy Wang},
title = {Colloidal ZnSe, ZnSe/ZnS, and ZnSe/ZnSeS Quantum Dots Synthesized from ZnO},
journal = {Journal of Physical Chemistry B},
year = {2004},
volume = {108},
publisher = {American Chemical Society (ACS)},
month = {oct},
url = {https://doi.org/10.1021/jp047035w},
number = {44},
pages = {17119--17123},
doi = {10.1021/jp047035w}
}
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Chen, Hsueh-Shih, et al. “Colloidal ZnSe, ZnSe/ZnS, and ZnSe/ZnSeS Quantum Dots Synthesized from ZnO.” Journal of Physical Chemistry B, vol. 108, no. 44, Oct. 2004, pp. 17119-17123. https://doi.org/10.1021/jp047035w.