Pleiades Publishing
High Energy Chemistry
,  том 54 ,  издание 6 ,  страницы 421-426

Relaxation Dynamics of Excited States in Mn2+-Doped ZnCdS (Core)/ZnS (Shell) Quantum Dots Ions in Propylene Carbonate

Тип публикации: Journal Article
Дата публикации: 2020-11-20
Pleiades Publishing
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SJR: 0.178
CiteScore: 0.9
Impact factor: 0.6
ISSN: 00181439, 16083148
Physical and Theoretical Chemistry
Краткое описание
It has been shown that luminescence in Mn@Zn0.49Cd0.51S/ZnS quantum dots (QDs) in propylene carbonate is due to a single Mn2+(4T1 → 6A1) band and has a quantum yield of ~24%. The Mn2+(4T1) level is excited through the light absorption in the exciton absorption bands of Zn0.49Cd0.51S/ZnS. The femtosecond dynamics of the difference spectra of Mn@Zn0.49Cd0.51S/ZnS QDs show fast relaxation of the exciton on the subpicosecond–picosecond timescale. At delay times in picosecond range, the band of stimulated luminescence has been detected in difference absorption spectra in the Mn2+(4T1 → 6A1) transition region. A qualitative hypothetical mechanism of nonradiative energy transfer from the exciton to Mn2+(4T1) involving the Auger transition in the trap states has been proposed. The assumption solves the problems of the energy excess of 0.98 eV in the energy transfer to the 3d5 level of Mn and of the conservation of the total spin of the system.
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Kostrov A. N. et al. Relaxation Dynamics of Excited States in Mn2+-Doped ZnCdS (Core)/ZnS (Shell) Quantum Dots Ions in Propylene Carbonate // High Energy Chemistry. 2020. Vol. 54. No. 6. pp. 421-426.
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Kostrov A. N., Gostev F. E., Shelaev I. V., Aybush A. V., Kabachiy Yu. A., Kochiev S. Yu., Antonova O. Yu., Valetsky P., Nadtochenko V. A. Relaxation Dynamics of Excited States in Mn2+-Doped ZnCdS (Core)/ZnS (Shell) Quantum Dots Ions in Propylene Carbonate // High Energy Chemistry. 2020. Vol. 54. No. 6. pp. 421-426.
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TY - JOUR
DO - 10.1134/S0018143920060090
UR - https://doi.org/10.1134/S0018143920060090
TI - Relaxation Dynamics of Excited States in Mn2+-Doped ZnCdS (Core)/ZnS (Shell) Quantum Dots Ions in Propylene Carbonate
T2 - High Energy Chemistry
AU - Kostrov, A N
AU - Gostev, F E
AU - Shelaev, I V
AU - Aybush, A V
AU - Kabachiy, Yu A
AU - Kochiev, S Yu
AU - Antonova, O Yu
AU - Valetsky, P.M.
AU - Nadtochenko, V. A.
PY - 2020
DA - 2020/11/20
PB - Pleiades Publishing
SP - 421-426
IS - 6
VL - 54
SN - 0018-1439
SN - 1608-3148
ER -
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@article{2020_Kostrov,
author = {A N Kostrov and F E Gostev and I V Shelaev and A V Aybush and Yu A Kabachiy and S Yu Kochiev and O Yu Antonova and P.M. Valetsky and V. A. Nadtochenko},
title = {Relaxation Dynamics of Excited States in Mn2+-Doped ZnCdS (Core)/ZnS (Shell) Quantum Dots Ions in Propylene Carbonate},
journal = {High Energy Chemistry},
year = {2020},
volume = {54},
publisher = {Pleiades Publishing},
month = {nov},
url = {https://doi.org/10.1134/S0018143920060090},
number = {6},
pages = {421--426},
doi = {10.1134/S0018143920060090}
}
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Kostrov, A. N., et al. “Relaxation Dynamics of Excited States in Mn2+-Doped ZnCdS (Core)/ZnS (Shell) Quantum Dots Ions in Propylene Carbonate.” High Energy Chemistry, vol. 54, no. 6, Nov. 2020, pp. 421-426. https://doi.org/10.1134/S0018143920060090.