Rise Kinetics of Up-Conversion Luminescence of the LiY0.8Yb0.2F4:Tm3+ (0.2 at %) Crystal with Pulsed Excitation

Mikheev, Artem; Kazakov, B. N.

doi:10.1134/s1063783419050172

Cited by 2 publications

(1 citation statement)

References 17 publications

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“…Within the framework of this model, one component describes the increase in the luminescence signal and contains information about the non-radiative transfer of energy from sensitizers to activators, and the other component describes the decrease in the signal and contains information about the actual decay time of the luminescence of acceptors. In our study, after analyzing all the kinetic curves, it became clear that this model poorly describes the initial section of the growth phase [52,54,55]. In addition, the authors [52] suggested that the transfer of energy from sensitizers to activators affects the decay time of the luminescence of activators.…”

Section: Investigation Of the Kinetics Of β-Nayf4:yb 3+ /Tm 3+ Lumine...mentioning

confidence: 85%

The Influence of Concentrations of Sensitizers and Activators on Luminescence Kinetics Parameters of Up-Conversion Nanocomplexes NaYF4:Yb3+/Tm3+

Burikov,

Filippova,

Proydakova

et al. 2024

Photonics

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For colloids of NaYF4:Yb3+/Tm3+ nanoparticles in DMSO, by the method of time-resolved luminescence spectroscopy with nanosecond pulsed excitation at a wavelength of 975 nm, the photophysical processes that determine the course of kinetic curves have been revealed. It has been found that the luminescence rise time decreases with an increase in the concentration of activators and sensitizers due to the increase in the efficiency of energy transfer from sensitizers to activators. The cross-relaxation of the excited states of activators provides a decrease in the luminescence decay time with an increase in the concentration of activators and a constant concentration of the sensitizer. There is no correlation between the time of luminescence decay with the change in the concentration of sensitizers and the constant concentration of activators due to the competition of the processes of energy back transfer from activators to sensitizers and the “feeding” of activators by excitations coming from remote sensitizer ions.

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Section: Investigation Of the Kinetics Of β-Nayf4:yb 3+ /Tm 3+ Lumine...mentioning

confidence: 85%

The Influence of Concentrations of Sensitizers and Activators on Luminescence Kinetics Parameters of Up-Conversion Nanocomplexes NaYF4:Yb3+/Tm3+

Burikov,

Filippova,

Proydakova

et al. 2024

Photonics

View full text Add to dashboard Cite

show abstract

The Influence of Concentrations of Sensitizers and Activators on Luminescence Kinetics Parameters of Upconversion Nanocomplexes NaYF4:Yb3+/Tm3+

Burikov,

Filippova,

Proydakova

et al. 2024

Preprint

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For colloids of NaYF4:Yb3+/Tm3+ nanoparticles in DMSO by the method of time-resolved lumi-nescence spectroscopy with nanosecond pulsed excitation at a wavelength of 975 nm the photo-physical processes that determine the course of kinetic curves have been revealed. It has been found that the luminescence rise time decreases with an increase of the concentration of activators and sensitizers due to increase of the efficiency of energy transfer from sensitizers to activators. Cross-relaxation of the excited states of activators provides a decrease of the lumi-nescence decay time with an increase of the concentration of activators and a constant concentration of the sensitizer. There was no correlation between the time of luminescence decay with the change of the concentration of sensitizers and constant concentration of activators due to the competition of the processes of energy back transfer from activators to sensitizers and the "feeding" of activators by excitations coming from remote sensitizer ions.

show abstract

Rise Kinetics of Up-Conversion Luminescence of the LiY0.8Yb0.2F4:Tm3+ (0.2 at %) Crystal with Pulsed Excitation

Cited by 2 publications

References 17 publications

The Influence of Concentrations of Sensitizers and Activators on Luminescence Kinetics Parameters of Up-Conversion Nanocomplexes NaYF4:Yb3+/Tm3+

The Influence of Concentrations of Sensitizers and Activators on Luminescence Kinetics Parameters of Up-Conversion Nanocomplexes NaYF4:Yb3+/Tm3+

The Influence of Concentrations of Sensitizers and Activators on Luminescence Kinetics Parameters of Upconversion Nanocomplexes NaYF4:Yb3+/Tm3+

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