Small, volume 12, issue 4, pages 466-476

Temperature-Dependent Exciton and Trap-Related Photoluminescence of CdTe Quantum Dots Embedded in a NaCl Matrix: Implication in Thermometry.

S. M. Kalytchuk 1, 2
Olga Zhovtiuk 1
2
 
Regional Centre of Advanced Technologies and Materials; Department of Physical Chemistry; Faculty of Science; Palacký University in Olomouc; Šlechtitelů 11 Olomouc 783 71 Czech Republic
Publication typeJournal Article
Publication date2015-11-30
Journal: Small
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor13.3
ISSN16136810, 16136829
General Chemistry
Biotechnology
General Materials Science
Biomaterials
Abstract
Temperature-dependent optical studies of semiconductor quantum dots (QDs) are fundamentally important for a variety of sensing and imaging applications. The steady-state and time-resolved photoluminescence properties of CdTe QDs in the size range from 2.3 to 3.1 nm embedded into a protective matrix of NaCl are studied as a function of temperature from 80 to 360 K. The temperature coefficient is found to be strongly dependent on QD size, with the highest sensitivity obtained for the smallest size of QDs. The emission from solid-state CdTe QD-based powders is maintained with high color purity over a wide range of temperatures. Photoluminescence lifetime data suggest that temperature dependence of the intrinsic radiative lifetime in CdTe QDs is rather weak, and it is mostly the temperature-dependent nonradiative decay of CdTe QDs which is responsible for the thermal quenching of photoluminescence intensity. By virtue of the temperature-dependent photoluminescence behavior, high color purity, photostability, and high photoluminescence quantum yield (26%-37% in the solid state), CdTe QDs embedded in NaCl matrices are useful solid-state probes for thermal imaging and sensing over a wide range of temperatures within a number of detection schemes and outstanding sensitivity, such as luminescence thermochromic imaging, ratiometric luminescence, and luminescence lifetime thermal sensing.

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Kalytchuk S. M. et al. Temperature-Dependent Exciton and Trap-Related Photoluminescence of CdTe Quantum Dots Embedded in a NaCl Matrix: Implication in Thermometry. // Small. 2015. Vol. 12. No. 4. pp. 466-476.
GOST all authors (up to 50) Copy
Kalytchuk S. M., Zhovtiuk O., Kershaw S. V., Zbořil R., Rogach A. L. Temperature-Dependent Exciton and Trap-Related Photoluminescence of CdTe Quantum Dots Embedded in a NaCl Matrix: Implication in Thermometry. // Small. 2015. Vol. 12. No. 4. pp. 466-476.
RIS |
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RIS Copy
TY - JOUR
DO - 10.1002/smll.201501984
UR - https://doi.org/10.1002/smll.201501984
TI - Temperature-Dependent Exciton and Trap-Related Photoluminescence of CdTe Quantum Dots Embedded in a NaCl Matrix: Implication in Thermometry.
T2 - Small
AU - Zhovtiuk, Olga
AU - Kalytchuk, S. M.
AU - Kershaw, Stephen V.
AU - Zbořil, Radek
AU - Rogach, Andrey L.
PY - 2015
DA - 2015/11/30 00:00:00
PB - Wiley
SP - 466-476
IS - 4
VL - 12
SN - 1613-6810
SN - 1613-6829
ER -
BibTex |
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BibTex Copy
@article{2015_Kalytchuk,
author = {Olga Zhovtiuk and S. M. Kalytchuk and Stephen V. Kershaw and Radek Zbořil and Andrey L. Rogach},
title = {Temperature-Dependent Exciton and Trap-Related Photoluminescence of CdTe Quantum Dots Embedded in a NaCl Matrix: Implication in Thermometry.},
journal = {Small},
year = {2015},
volume = {12},
publisher = {Wiley},
month = {nov},
url = {https://doi.org/10.1002/smll.201501984},
number = {4},
pages = {466--476},
doi = {10.1002/smll.201501984}
}
MLA
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MLA Copy
Kalytchuk, S. M., et al. “Temperature-Dependent Exciton and Trap-Related Photoluminescence of CdTe Quantum Dots Embedded in a NaCl Matrix: Implication in Thermometry..” Small, vol. 12, no. 4, Nov. 2015, pp. 466-476. https://doi.org/10.1002/smll.201501984.
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