Effect of crystallinity on the optical thermometry sensitivity of Tm3+/Yb3+ codoped LiNbO3 crystal

Xing, Lili; Yang, Weiqi; Ma, Decai; Wang, Rui

doi:10.1016/j.snb.2015.06.132

Cited by 56 publications

(11 citation statements)

References 21 publications

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“…Moreover, the absolute sensitivities of Tm 3+ /Yb 3+ co-doped LiNbO3 polycrystals was estimated to be 2129.23/T 2 [24]. For our glass-ceramic this value 1567/T 2 is significantly lower.…”

Section: Optical Study Vuv Excitationmentioning

confidence: 60%

Silica-based oxyfluoride glass and glass-ceramic doped with Tm3+ and Yb3+ -VUV-VIS-NIR spectroscopy and optical thermometry

Lisiecki

Ryba‐Romanowski

2020

Journal of Alloys and Compounds

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Optical, structural and morphological properties of Tm 3+ /Yb 3+ co-doped NaYF4-based nanoglass-ceramic and a precursor glass have been investigated. The controlled heat-treatment of multicomponent oxyfluoride glass at 640 o C for 2h was used to obtain crystalline precipitations. The differences in optical characteristics have been discussed analysing spectra recorded within wide VUV-VIS-NIR spectral range and considering relaxation dynamic of involved excited states. Optical spectra and luminescence decay curves were measured as a function of temperature in the range of 295-725 K. Based on up-converted emission spectra excited at 975 nm, temperature sensing properties of glass-ceramic were verified. The fluorescence intensity ratio between the up-converted emission bands located at around 795 nm (Tm 3+ : 3 H4-3 H6) and 695 nm (Tm 3+ : 3 F3,2-3 H6) was studied. The maximum relative temperature sensitivity was determined to be 0.35% K-1 at 445 K.

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“…Moreover, the absolute sensitivities of Tm 3+ /Yb 3+ co-doped LiNbO3 polycrystals was estimated to be 2129.23/T 2 [24]. For our glass-ceramic this value 1567/T 2 is significantly lower.…”

Section: Optical Study Vuv Excitationmentioning

confidence: 60%

Silica-based oxyfluoride glass and glass-ceramic doped with Tm3+ and Yb3+ -VUV-VIS-NIR spectroscopy and optical thermometry

Lisiecki

Ryba‐Romanowski

2020

Journal of Alloys and Compounds

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“…The relative thermal sensitivity is defined as [1] stated in Equation 3: Figure 3c shows S rel calculated for our particles, with a value of 3.3% K −1 at 298 K. Since it depends on the ∆E value, that does not change substantially when changing the doping concentration, only a single value can be given for all the nanoparticles analyzed. The S rel values reported in the literature are between 1.0 and 28% K −1 , with most of the values being in the range 2.0-3.3% K −1 [34][35][36][37][38][39][40]. The value we report here for Tm,Yb:GdVO 4 @SiO 2 nanoparticles is the highest reported up to now in the literature for Tm 3+ -doped systems, only surpassed by that of Tm:NaYbF 4 @SiO 2 nanoparticles, although in that case, the maximum thermal relative sensitivity has been found at 100 K, far away from the biological range of temperatures.…”

Section: Methodsmentioning

confidence: 99%

Bifunctional Tm3+,Yb3+:GdVO4@SiO2 Core-Shell Nanoparticles in HeLa Cells: Upconversion Luminescence Nanothermometry in the First Biological Window and Biolabelling in the Visible

et al. 2020

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The bifunctional possibilities of Tm,Yb:GdVO4@SiO2 core-shell nanoparticles for temperature sensing by using the near-infrared (NIR)-excited upconversion emissions in the first biological window, and biolabeling through the visible emissions they generate, were investigated. The two emission lines located at 700 and 800 nm, that arise from the thermally coupled 3F2,3 and 3H4 energy levels of Tm3+, were used to develop a luminescent thermometer, operating through the Fluorescence Intensity Ratio (FIR) technique, with a very high thermal relative sensitivity. Moreover, since the inert shell surrounding the luminescent active core allows for dispersal of the nanoparticles in water and biological compatible fluids, we investigated the penetration depth that can be realized in biological tissues with their emissions in the NIR range, achieving a value of 0.8 mm when excited at powers of 50 mW. After their internalization in HeLa cells, a low toxicity was observed and the potentiality for biolabelling in the visible range was demonstrated, which facilitated the identification of the location of the nanoparticles inside the cells, and the temperature determination.

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“…On the basis of linear equation R(T) = a + T * b, the value of sensitivity S is equal to b, viz, 0.00758 K −1 , which is higher than the maximum sensitivities of Er 3+ -doped LuNbO 4 phosphor (0.0058 K −1 ) 47 and Tm 3+ /Yb 3+ co-doped SrWO 4 phosphor (0.0062 K −1 ) 48 derived based on the thermally coupled levels. [49][50][51][52] Except for the high sensitivity, the present temperature sensing also exhibits another advantage, namely, the constant sensitivity, which is different from the temperature sensing based on the thermally coupled levels. The sensitivity based on the thermally coupled levels is usually dependent on the temperature.…”

Section: Luminescence Thermal Stability and Temperature Self-monitormentioning

confidence: 96%

Full color white light, temperature self‐monitor, and thermochromatic effect of Cu⁺ and Tm³⁺ codoped germanate glasses

et al. 2020

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As one of the most promising solid state lighting (SSL) sources, white-light emitting diodes (w-LEDs) were greatly popularized during most recent decade, and began to replace gradually conventional incandescent and fluorescent lamps in the marketplace due to their serving longevity, environmental friendliness, high efficiency, excellent sturdiness and so on. 1-5 At present, two mainstream methods to fabricate w-LEDs are wieldy adopted: one is the combination of yellow-emitting YAG:Ce 3+ phosphor with InGaN blue-emitting chip; another is coating the red, green, and blue (tricolor phosphors) emitting phosphors on near-ultraviolet (NUV) chip. 6-8 However, the former suffers from low color rendering index (CRI) and poor correlated color temperature (CCT) due to the lack of red components in its spectrum. The latter

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Effect of crystallinity on the optical thermometry sensitivity of Tm3+/Yb3+ codoped LiNbO3 crystal

Cited by 56 publications

References 21 publications

Silica-based oxyfluoride glass and glass-ceramic doped with Tm3+ and Yb3+ -VUV-VIS-NIR spectroscopy and optical thermometry

Silica-based oxyfluoride glass and glass-ceramic doped with Tm3+ and Yb3+ -VUV-VIS-NIR spectroscopy and optical thermometry

Bifunctional Tm3+,Yb3+:GdVO4@SiO2 Core-Shell Nanoparticles in HeLa Cells: Upconversion Luminescence Nanothermometry in the First Biological Window and Biolabelling in the Visible

Full color white light, temperature self‐monitor, and thermochromatic effect of Cu⁺ and Tm³⁺ codoped germanate glasses

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Effect of crystallinity on the optical thermometry sensitivity of Tm3+/Yb3+ codoped LiNbO3 crystal

Cited by 56 publications

References 21 publications

Silica-based oxyfluoride glass and glass-ceramic doped with Tm3+ and Yb3+ -VUV-VIS-NIR spectroscopy and optical thermometry

Silica-based oxyfluoride glass and glass-ceramic doped with Tm3+ and Yb3+ -VUV-VIS-NIR spectroscopy and optical thermometry

Bifunctional Tm3+,Yb3+:GdVO4@SiO2 Core-Shell Nanoparticles in HeLa Cells: Upconversion Luminescence Nanothermometry in the First Biological Window and Biolabelling in the Visible

Full color white light, temperature self‐monitor, and thermochromatic effect of Cu+ and Tm3+ codoped germanate glasses

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Full color white light, temperature self‐monitor, and thermochromatic effect of Cu⁺ and Tm³⁺ codoped germanate glasses