Journal of Luminescence, volume 146, pages 133-140

Structural, optical and crystal field analyses of undoped and Mn2+-doped ZnS nanoparticles synthesized via reverse micelle route

R M Krsmanović Whiffen 1
Dragana Jovanovic 1
Ž. Antić 1
B Bartova 2
Dušan D Milivojević 1
Miroslav Dramicanin 1
Mikhail G. Brik 3
1
 
Vinča Institute of Nuclear Sciences, University of Belgrade, P.O. Box 522, Belgrade 11001, Serbia
3
 
Institute of Physics, University of Tartu, Riia 142, Tartu 51014, Estonia
Publication typeJournal Article
Publication date2014-02-01
Quartile SCImago
Q2
Quartile WOS
Q2
Impact factor3.6
ISSN00222313
General Chemistry
Biochemistry
Biophysics
Atomic and Molecular Physics, and Optics
Condensed Matter Physics
Abstract
Zinc sulfide, both as a bulk material and in nanocrystalline form, is a valuable luminescent material with important applications. Doped ZnS nanoparticles of around 5 nm are the material of choice for optoelectronic applications running in the UV region owing to their significant quantum size effect. This paper concerns detailed structural, spectroscopic and crystal field studies of ZnS nanoparticles, both pure and doped with Mn2+ ions, successfully synthesized at room temperature using a simple reverse micelle technique in the Triton X-100/cyclohexane medium. The resulting ZnS sphalerite phase smallsize nanoparticles (3-5 nm) have a much larger energy band gap ( similar to 4.7 eV) than that reported for the bulk ZnS (3.6 eV), thus confirming a pronounced quantum confinement effect. The electron paramagnetic resonance data provided evidence for the existence of two distinct environments for Mn2+ ions: the interior (core) and near the surface of the nanoparticles. The presence of an Mn2+-characteristic orange emission centered at 600 nm confirmed that our sample's were properly doped with Mn2+ ions, as the T-4(1)->(6)A(1) radiation transition could arise only on the basis of Mn2+ ions incorporated into the ZnS nanoparticles. To the best of our knowledge, our finding include the longest decay time component for the orange emission ever observed, timed at about 3.3 ms. The experimental excitation spectra were analyzed and the transitions assigned using the exchange charge model of theory of crystal field, which allowed to calculate the energy level scheme of the Mn2+ ions. The results presented in this paper provide us with detailed information about the ZnS sphalerite nanocrystals studied and can be readily applied to other similar systems. (C) 2013 Elsevier B.V. All rights reserved.

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Krsmanović Whiffen R. M. et al. Structural, optical and crystal field analyses of undoped and Mn2+-doped ZnS nanoparticles synthesized via reverse micelle route // Journal of Luminescence. 2014. Vol. 146. pp. 133-140.
GOST all authors (up to 50) Copy
Krsmanović Whiffen R. M., Jovanovic D., Antić Ž., Bartova B., Milivojević D. D., Dramicanin M., Brik M. G. Structural, optical and crystal field analyses of undoped and Mn2+-doped ZnS nanoparticles synthesized via reverse micelle route // Journal of Luminescence. 2014. Vol. 146. pp. 133-140.
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RIS Copy
TY - JOUR
DO - 10.1016/j.jlumin.2013.09.032
UR - https://doi.org/10.1016/j.jlumin.2013.09.032
TI - Structural, optical and crystal field analyses of undoped and Mn2+-doped ZnS nanoparticles synthesized via reverse micelle route
T2 - Journal of Luminescence
AU - Krsmanović Whiffen, R M
AU - Jovanovic, Dragana
AU - Antić, Ž.
AU - Bartova, B
AU - Milivojević, Dušan D
AU - Dramicanin, Miroslav
AU - Brik, Mikhail G.
PY - 2014
DA - 2014/02/01 00:00:00
PB - Elsevier
SP - 133-140
VL - 146
SN - 0022-2313
ER -
BibTex
Cite this
BibTex Copy
@article{2014_Krsmanović Whiffen,
author = {R M Krsmanović Whiffen and Dragana Jovanovic and Ž. Antić and B Bartova and Dušan D Milivojević and Miroslav Dramicanin and Mikhail G. Brik},
title = {Structural, optical and crystal field analyses of undoped and Mn2+-doped ZnS nanoparticles synthesized via reverse micelle route},
journal = {Journal of Luminescence},
year = {2014},
volume = {146},
publisher = {Elsevier},
month = {feb},
url = {https://doi.org/10.1016/j.jlumin.2013.09.032},
pages = {133--140},
doi = {10.1016/j.jlumin.2013.09.032}
}
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