Open Access
Results in Physics, volume 27, pages 104488
Tunable blue-shift of the charge-transfer photoluminescence in tetrapod-shaped CdTe/CdSe nanocrystals
Golinskaya Anastasiya D
1
,
Smirnov Alexander M
,
Mantsevich Vladimir N
,
Kozlova Maria V
,
Dneprovskii Vladimir S
3
,
Zharkova Ekaterina V
3
,
Smirnov A.V.
1
,
Kozlova M. A.
3
,
MANTSEVICH V. N.
1
Publication type: Journal Article
Publication date: 2021-08-01
General Physics and Astronomy
Abstract
• The photoluminescence features of the nano-tetrapod CdTe/CdSe are investigated. • Tunable giant blue shift of charge-transfer photoluminescence was first discovered. • Blue shift is explained by indirect exciton radius growth with space phase filling. • Charge-transfer photoluminescence shift with the pump intensity growth is revealed. • The nonlinear transmission of molecular donor–acceptor nano-tetrapod is analyzed. The photoluminescence peculiarities and the excited state absorption of the tetrapod-shaped CdTe/CdSe nanocrystals are studied in the single-photon excitation regime. A giant blue shift (≈ 129 meV) of the charge-transfer photoluminescence spectra is revealed for the first time in the molecular nanoscale donor–acceptor system with the pump intensity growth. The photoluminescence lines of the CdTe and CdSe domains, originating from direct electron-hole transitions were observed in addition to the tunable photoluminescence across the indirect gap. Differential transmission spectra reveal the superposition of the exciton’s transitions bleaching originating from different structural domains of the CdTe/CdSe nanocrystals, which confirms the observed separated excitonic emission bands in the photoluminescence spectra. The observed features of the photoluminescence and differential transmission spectra allow to determine and to analyze possible exciton’s relaxation channels in the CdTe/CdSe nanocrystals. Obtained results make nanocrystals in the form of nano-tetrapods promising for implementation in optoelectronic nanodevices.
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Golinskaya A. D. et al. Tunable blue-shift of the charge-transfer photoluminescence in tetrapod-shaped CdTe/CdSe nanocrystals // Results in Physics. 2021. Vol. 27. p. 104488.
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Golinskaya A. D., Smirnov A. M., Kozlova M. V., Zharkova E. V., Vasiliev R. B., Mantsevich V. N., Dneprovskii V. S., Smirnov A., Kozlova M. A., MANTSEVICH V. N. Tunable blue-shift of the charge-transfer photoluminescence in tetrapod-shaped CdTe/CdSe nanocrystals // Results in Physics. 2021. Vol. 27. p. 104488.
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TY - JOUR
DO - 10.1016/j.rinp.2021.104488
UR - https://doi.org/10.1016%2Fj.rinp.2021.104488
TI - Tunable blue-shift of the charge-transfer photoluminescence in tetrapod-shaped CdTe/CdSe nanocrystals
T2 - Results in Physics
AU - Golinskaya, Anastasiya D
AU - Smirnov, Alexander M
AU - Kozlova, Maria V
AU - Zharkova, Ekaterina V
AU - Vasiliev, Roman B.
AU - Mantsevich, Vladimir N
AU - Dneprovskii, Vladimir S
AU - Smirnov, A.V.
AU - Kozlova, M. A.
AU - MANTSEVICH, V. N.
PY - 2021
DA - 2021/08/01 00:00:00
PB - Elsevier
SP - 104488
VL - 27
SN - 2211-3797
ER -
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@article{2021_Golinskaya,
author = {Anastasiya D Golinskaya and Alexander M Smirnov and Maria V Kozlova and Ekaterina V Zharkova and Roman B. Vasiliev and Vladimir N Mantsevich and Vladimir S Dneprovskii and A.V. Smirnov and M. A. Kozlova and V. N. MANTSEVICH},
title = {Tunable blue-shift of the charge-transfer photoluminescence in tetrapod-shaped CdTe/CdSe nanocrystals},
journal = {Results in Physics},
year = {2021},
volume = {27},
publisher = {Elsevier},
month = {aug},
url = {https://doi.org/10.1016%2Fj.rinp.2021.104488},
pages = {104488},
doi = {10.1016/j.rinp.2021.104488}
}
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