Physical Review B, volume 83, issue 4, publication number 045301
Substitutional and surface Mn2 +
M Stefan
1
,
M. Stefan
1
,
S.V. Nistor
1
,
D. Ghica
1
,
C. D. Mateescu
1
,
M. Nikl
2
,
Martin Nikl
2
,
R. Kucerkova
2
1
National Institute of Materials Physics, POB MG-7, RO-077125 Magurele, Romania
|
Publication type: Journal Article
Publication date: 2011-01-20
Journal:
Physical Review B
Quartile SCImago
Q1
Quartile WOS
Q2
Impact factor: 3.7
ISSN: 24699950, 24699969, 10980121, 1550235X
Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Abstract
The EPR, radioluminescence, and photoluminescence of cubic ZnS (cZnS) nanocrystals (NCs) with a narrow size distribution centered at 2 nm, doped with 0.1, 0.2, and $0.5 \mathrm{at}.%$ Mn${}^{2+}$ ions were investigated. Besides the main lines from substitutional Mn${}^{2+}$ ions localized in the core of the NCs next to a stacking defect, the EPR spectra exhibited two broader hyperfine sextets, attributed to the so-called Mn(II) and Mn(III) surface centers, which could be separated by adequate thermal treatments. The contribution to the photoluminescence from the Mn${}^{2+}$ ions at various sites was further determined from the analysis of the steady-state and time-resolved photoluminescence data from cZnS:Mn NCs subjected to thermal treatments and from cZnS:Mn single crystals. Thus, the main emission consisting of two intense overlapping bands peaking at 596 and 630 nm was attributed to the ${}^{4}{T}_{1}\ensuremath{-}{}^{6}{A}_{1}$ transition of the substitutional Mn${}^{2+}$ ions in the core of the cZnS nanocrystals and to residual aggregated Mn${}^{2+}$ ions, respectively, the last ones being responsible for a broad EPR line observed in the $X$-band spectrum. The Mn(II) and Mn(III) centers, consisting of Mn${}^{2+}$ ions in the oxidized and hydrolyzed surface layer of the NCs, respectively, are only indirectly involved in the energy transfer to the substitutional Mn${}^{2+}$ centers, very likely through pairs interaction.
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Citations by publishers
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1 publication, 2.7%
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14
16
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- We do not take into account publications without a DOI.
- Statistics recalculated only for publications connected to researchers, organizations and labs registered on the platform.
- Statistics recalculated weekly.
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Stefan M. et al. Substitutional and surface Mn2+centers in cubic ZnS:Mn nanocrystals. A correlated EPR and photoluminescence study // Physical Review B. 2011. Vol. 83. No. 4. 045301
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Stefan M., Stefan M., Nistor S., Ghica D., Mateescu C. D., Nikl M., Nikl M., Kucerkova R. Substitutional and surface Mn2+centers in cubic ZnS:Mn nanocrystals. A correlated EPR and photoluminescence study // Physical Review B. 2011. Vol. 83. No. 4. 045301
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TY - JOUR
DO - 10.1103/physrevb.83.045301
UR - https://doi.org/10.1103/physrevb.83.045301
TI - Substitutional and surface Mn2+centers in cubic ZnS:Mn nanocrystals. A correlated EPR and photoluminescence study
T2 - Physical Review B
AU - Stefan, M
AU - Nistor, S.V.
AU - Ghica, D.
AU - Mateescu, C. D.
AU - Nikl, M.
AU - Kucerkova, R.
AU - Stefan, M.
AU - Nikl, Martin
PY - 2011
DA - 2011/01/20 00:00:00
PB - American Physical Society (APS)
IS - 4
VL - 83
SN - 2469-9950
SN - 2469-9969
SN - 1098-0121
SN - 1550-235X
ER -
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@article{2011_Stefan,
author = {M Stefan and S.V. Nistor and D. Ghica and C. D. Mateescu and M. Nikl and R. Kucerkova and M. Stefan and Martin Nikl},
title = {Substitutional and surface Mn2+centers in cubic ZnS:Mn nanocrystals. A correlated EPR and photoluminescence study},
journal = {Physical Review B},
year = {2011},
volume = {83},
publisher = {American Physical Society (APS)},
month = {jan},
url = {https://doi.org/10.1103/physrevb.83.045301},
number = {4},
doi = {10.1103/physrevb.83.045301}
}