Down-conversion based Tm3+:LiY1-XYbXF4 temperature sensors

Khadiev, A.R.; Korableva, S. L.; Ginkel, A.K.; Морозов, О. А.; Низамутдинов, А. С.; Семашко, В. В.; Pudovkin, M.S.

doi:10.1016/j.optmat.2022.113118

Cited by 6 publications

(4 citation statements)

References 54 publications

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“…These results are comparable to one of the main competitor Nd 3+ , Yb 3+ :LiLaP4O12 (0.1-0.3%•K −1 ) [15]. In the case of Tm 3+ /Yb 3+ down-conversion system operating in the biological window, the obtained Sr values also exceed the results obtained in [22]. It also should be noted, that the maximum Sr values are observed in the 80-150 K range.…”

Section: Temperature Dependent Spectral-kinetic Characterization Of D...supporting

confidence: 76%

Nd3+, Yb3+:YF3 Optical Temperature Nanosensors Operating in the Biological Windows

et al. 2022

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This work is devoted to the study of thermometric performances of Nd3+ (0.1 or 0.5 mol.%), Yb3+ (X%):YF3 nanoparticles. Temperature sensitivity of spectral shape is related to the phonon-assisted nature of energy transfer (PAET) between Nd3+ and Yb3+). However, in the case of single-doped Nd3+ (0.1 or 0.5 mol.%):YF3 nanoparticles, luminescence decay time (LDT) of 4F3/2 level of Nd3+ in Nd3+ (0.5 mol.%):YF3 decreases with the temperature decrease. In turn, luminescence decay time in Nd3+ (0.1 mol.%):YF3 sample remains constant. It was proposed, that at 0.5 mol.% the cross-relaxation (CR) between Nd3+ ions takes place in contradistinction from 0.1 mol.% Nd3+ concentration. The decrease of LDT with temperature is explained by the decrease of distances between Nd3+ with temperature that leads to the increase of cross-relaxation efficiency. It was suggested, that the presence of both CR and PAET processes in the studied system (Nd3+ (0.5 mol.%), Yb3+ (X%):YF3) nanoparticles provides higher temperature sensitivity compared to the systems having one process (Nd3+ (0.1 mol.%), Yb3+ (X%):YF3). The experimental results confirmed this suggestion. The maximum relative temperature sensitivity was 0.9%·K−1 at 80 K.

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Section: Temperature Dependent Spectral-kinetic Characterization Of D...supporting

confidence: 76%

Nd3+, Yb3+:YF3 Optical Temperature Nanosensors Operating in the Biological Windows

et al. 2022

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“…Indeed, the work [24] estimated time resonant cross-relaxation between Tm 3+ ions from 8 µs (at 1.0% concentration) to 30 µs (at 4.0 % concentration). The contribution of faster cross-relaxation process in population of 4 F 3/2 level increased with the increase in Yb 3+ that led to rising-time shortening. Figure 5b shows the luminescence decay time at an excitation wavelength of 520 nm as a function of Yb 3+ concentration.…”

Section: Resultsmentioning

confidence: 93%

“…Indeed, in order to confirm the presence of radiative and nonradiative transitions, we detected the luminescence spectrum of Nd 3+ (0.3 mol.%) Yb 3+ (2 mol.%):LiYF4 phosphors in the slightly broader (spectral range 710-1100 nm) spectral range under 355 nm excitation (Figure 3). According to the literature data [5], there were two peaks at ~740 and 800 nm that were interpreted as transitions from the upper 4 D5/2 and 4 P3/2 levels to 4 FJ of Nd 3+ . Hence, the 4 FJ levels were populated via these radiative transitions.…”

Section: Resultsmentioning

confidence: 99%

“…In the case of hyperemia of the cell temperature mapping, the optical probes should be located in the special part of the studied object. For this application, some double-doped rare-earth inorganic phosphors demonstrate temperature-dependent spectral-kinetic properties due to temperature-dependent energy exchange processes between the doping ions [3,4]. A promising down-conversion ion pair is Nd 3+ /Yb 3+ .…”

Section: Introductionmentioning

confidence: 99%

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Optical Temperature Sensors Based on Down-Conversion Nd3+,Yb3+:LiYF4 Microparticles

et al. 2023

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Nd3+ (0.3 mol.%), Yb3+ (0, 1, 2, 3 and 5 mol.%): LiYF4 phosphors were grown by the Bridgman–Stockbarger technique. The luminescence intensity ratio (LIR) of Nd3+ (4F3/2–4I9/2, ~866 nm) and Yb3+ emission (2F5/2–2F7/2, ~980 nm) was taken as a parameter. The energy exchange between 4F3/2 (Nd3+) and 2F5/2 (Yb3+) occurs via phonons, which elucidates the LIR temperature dependence. The influence of the cross-relaxation process on the temperature sensitivity was estimated as negligible. The LIR function depends on the Yb3+ concentration at a fixed 0.3 mol.% Nd3+. The maximum Sa and Sr value were reached for Nd3+ (0.3%), Yb3+ (1.0%): LiYF4 (Sa = 0.007 K−1 at 320 K) and Nd3+ (0.3%), Yb3+ (5.0%): LiYF4 (Sr = 1, 1.03%*K−1 at 260 K), respectively.

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