ACS Nano, volume 5, issue 5, pages 3758-3765

Infrared Emitting and Photoconducting Colloidal Silver Chalcogenide Nanocrystal Quantum Dots from a Silylamide-Promoted Synthesis

Maksym Yarema 1
Stefan Pichler 1
Mykhailo Sytnyk 1, 2
Robert Seyrkammer 1
Rainer T. Lechner 3
Gerhard Fritz-Popovski 3
Dorota Jarzab 4
Krisztina Szendrei 4
Roland Resel 5
Oleksandra Korovyanko 2
Maria A. Loi 4
Oskar Paris 3
Günter Hesser 6
Wolfgang Heiss 1
1
 
Institute for Semiconductor and Solid State Physics, University Linz, Altenbergerstr. 69, Linz 4040, Austria
2
 
Department of Inorganic Chemistry, University Chernivtsi, L. Ukrainky Str. 25, Chernivtsi, 58012, Ukraine
3
 
Institute of Physics, Montanuniversitaet Leoben, Franz Josef Str. 18, Leoben, 8700, Austria
6
 
Center of Surface and Nanoanalytics, University Linz, Altenbergerstr. 69, Linz 4040, Austria
Publication typeJournal Article
Publication date2011-04-22
Journal: ACS Nano
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor17.1
ISSN19360851, 1936086X
General Physics and Astronomy
General Materials Science
General Engineering
Abstract
Here, we present a hot injection synthesis of colloidal Ag chalcogenide nanocrystals (Ag(2)Se, Ag(2)Te, and Ag(2)S) that resulted in exceptionally small nanocrystal sizes in the range between 2 and 4 nm. Ag chalcogenide nanocrystals exhibit band gap energies within the near-infrared spectral region, making these materials promising as environmentally benign alternatives to established infrared active nanocrystals containing toxic metals such as Hg, Cd, and Pb. We present Ag(2)Se nanocrystals in detail, giving size-tunable luminescence with quantum yields above 1.7%. The luminescence, with a decay time on the order of 130 ns, was shown to improve due to the growth of a monolayer thick ZnSe shell. Photoconductivity with a quantum efficiency of 27% was achieved by blending the Ag(2)Se nanocrystals with a soluble fullerene derivative. The co-injection of lithium silylamide was found to be crucial to the synthesis of Ag chalcogenide nanocrystals, which drastically increased their nucleation rate even at relatively low growth temperatures. Because the same observation was made for the nucleation of Cd chalcogenide nanocrystals, we conclude that the addition of lithium silylamide might generally promote wet-chemical synthesis of metal chalcogenide nanocrystals, including in as-yet unexplored materials.

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Yarema M. et al. Infrared Emitting and Photoconducting Colloidal Silver Chalcogenide Nanocrystal Quantum Dots from a Silylamide-Promoted Synthesis // ACS Nano. 2011. Vol. 5. No. 5. pp. 3758-3765.
GOST all authors (up to 50) Copy
Yarema M., Pichler S., Sytnyk M., Seyrkammer R., Lechner R. T., Fritz-Popovski G., Jarzab D., Szendrei K., Resel R., Korovyanko O., Loi M. A., Paris O., Hesser G., Heiss W. Infrared Emitting and Photoconducting Colloidal Silver Chalcogenide Nanocrystal Quantum Dots from a Silylamide-Promoted Synthesis // ACS Nano. 2011. Vol. 5. No. 5. pp. 3758-3765.
RIS |
Cite this
RIS Copy
TY - JOUR
DO - 10.1021/nn2001118
UR - https://doi.org/10.1021/nn2001118
TI - Infrared Emitting and Photoconducting Colloidal Silver Chalcogenide Nanocrystal Quantum Dots from a Silylamide-Promoted Synthesis
T2 - ACS Nano
AU - Seyrkammer, Robert
AU - Jarzab, Dorota
AU - Szendrei, Krisztina
AU - Korovyanko, Oleksandra
AU - Hesser, Günter
AU - Yarema, Maksym
AU - Pichler, Stefan
AU - Sytnyk, Mykhailo
AU - Lechner, Rainer T.
AU - Fritz-Popovski, Gerhard
AU - Resel, Roland
AU - Loi, Maria A.
AU - Paris, Oskar
AU - Heiss, Wolfgang
PY - 2011
DA - 2011/04/22 00:00:00
PB - American Chemical Society (ACS)
SP - 3758-3765
IS - 5
VL - 5
SN - 1936-0851
SN - 1936-086X
ER -
BibTex |
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BibTex Copy
@article{2011_Yarema,
author = {Robert Seyrkammer and Dorota Jarzab and Krisztina Szendrei and Oleksandra Korovyanko and Günter Hesser and Maksym Yarema and Stefan Pichler and Mykhailo Sytnyk and Rainer T. Lechner and Gerhard Fritz-Popovski and Roland Resel and Maria A. Loi and Oskar Paris and Wolfgang Heiss},
title = {Infrared Emitting and Photoconducting Colloidal Silver Chalcogenide Nanocrystal Quantum Dots from a Silylamide-Promoted Synthesis},
journal = {ACS Nano},
year = {2011},
volume = {5},
publisher = {American Chemical Society (ACS)},
month = {apr},
url = {https://doi.org/10.1021/nn2001118},
number = {5},
pages = {3758--3765},
doi = {10.1021/nn2001118}
}
MLA
Cite this
MLA Copy
Yarema, Maksym, et al. “Infrared Emitting and Photoconducting Colloidal Silver Chalcogenide Nanocrystal Quantum Dots from a Silylamide-Promoted Synthesis.” ACS Nano, vol. 5, no. 5, Apr. 2011, pp. 3758-3765. https://doi.org/10.1021/nn2001118.
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