Journal of Physical Chemistry C, volume 111, issue 40, pages 14628-14637
Aqueous Synthesis of Thiol-Capped CdTe Nanocrystals: State-of-the-Art
Andrey L. Rogach
1
,
Thomas Franzl
1
,
T. A. Klar
1
,
. Feldmann
1
,
Nikolai Gaponik
1
,
Vladimir Lesnyak
1
,
Alexey Shavel
1
,
Yury P. Rakovich
1
,
John F. Donegan
1
Publication type: Journal Article
Publication date: 2007-09-18
Journal:
Journal of Physical Chemistry C
Q1
Q3
SJR: 0.957
CiteScore: 6.5
Impact factor: 3.3
ISSN: 19327447, 19327455
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
Physical and Theoretical Chemistry
General Energy
Abstract
We report on the state-of-the art synthesis and improved luminescence properties of thiol-capped CdTe nanocrystals (NCs) synthesized in water. The optimized pH (12) and molar ratio of thiol to Cd ions (1.3:1) increases the room-temperature photoluminescence quantum efficiency of as-synthesized CdTe NCs capped by thioglycolic acid (TGA) to values of 40−60%. By employing mercaptopropionic acid (MPA) as a stabilizer, we have synthesized large (up to 6.0 nm in diameter) NCs so that the spectral range of the NCs' emission currently available within this synthetic route extends from 500 to 800 nm. Sizing curve for thiol-capped CdTe NCs is provided. In contrast to CdTe NCs capped by TGA, MPA-capped CdTe NCs show up to 1 order of magnitude longer (up to 145 ns) emission decay times, which become monoexponential for larger particles. This phenomenon is explained by considering the energetics of the Te-related traps in respect to the valence-band position of CdTe NCs. The correlation between luminescence quantum ef...
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Rogach A. L. et al. Aqueous Synthesis of Thiol-Capped CdTe Nanocrystals: State-of-the-Art // Journal of Physical Chemistry C. 2007. Vol. 111. No. 40. pp. 14628-14637.
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Rogach A. L., Franzl T., Klar T. A., Feldmann .., Gaponik N., Lesnyak V., Shavel A., Eychmüller A., Rakovich Y. P., Donegan J. F. Aqueous Synthesis of Thiol-Capped CdTe Nanocrystals: State-of-the-Art // Journal of Physical Chemistry C. 2007. Vol. 111. No. 40. pp. 14628-14637.
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TY - JOUR
DO - 10.1021/jp072463y
UR - https://doi.org/10.1021/jp072463y
TI - Aqueous Synthesis of Thiol-Capped CdTe Nanocrystals: State-of-the-Art
T2 - Journal of Physical Chemistry C
AU - Rogach, Andrey L.
AU - Franzl, Thomas
AU - Klar, T. A.
AU - Feldmann, .
AU - Gaponik, Nikolai
AU - Lesnyak, Vladimir
AU - Shavel, Alexey
AU - Eychmüller, Alexander
AU - Rakovich, Yury P.
AU - Donegan, John F.
PY - 2007
DA - 2007/09/18
PB - American Chemical Society (ACS)
SP - 14628-14637
IS - 40
VL - 111
SN - 1932-7447
SN - 1932-7455
ER -
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@article{2007_Rogach,
author = {Andrey L. Rogach and Thomas Franzl and T. A. Klar and . Feldmann and Nikolai Gaponik and Vladimir Lesnyak and Alexey Shavel and Alexander Eychmüller and Yury P. Rakovich and John F. Donegan},
title = {Aqueous Synthesis of Thiol-Capped CdTe Nanocrystals: State-of-the-Art},
journal = {Journal of Physical Chemistry C},
year = {2007},
volume = {111},
publisher = {American Chemical Society (ACS)},
month = {sep},
url = {https://doi.org/10.1021/jp072463y},
number = {40},
pages = {14628--14637},
doi = {10.1021/jp072463y}
}
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Rogach, Andrey L., et al. “Aqueous Synthesis of Thiol-Capped CdTe Nanocrystals: State-of-the-Art.” Journal of Physical Chemistry C, vol. 111, no. 40, Sep. 2007, pp. 14628-14637. https://doi.org/10.1021/jp072463y.