Nucleation and growth behavior of Er<sup>3+</sup> doped oxyfluorophosphate glasses

Ojha, N.; Szczodra, A.; Boetti, Nadia Giovanna; Massera, Jonathan; Petit, Laëticia

doi:10.1039/d0ra04681g

Cited by 11 publications

(13 citation statements)

References 54 publications

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“…Na, Bi, and Ba are not expected to be in the coordination site of Er 3+ ions. The absorption cross sections at 980 and 1530 nm are similar to those reported in other tellurite glasses [42][43][44] and in germanate glasses 45 but are higher than in phosphate glass, 46 silica, and silicate glasses. 47 Figure 2A-C displays the normalized upconversion, NIR, and MIR spectra of the Er 3+ -doped glasses obtained using 980-nm pumping, respectively.…”

Section: Resultssupporting

confidence: 85%

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Study of visible, NIR, and MIR spectroscopic properties of Er³⁺‐doped tellurite glasses and glass–ceramics

et al. 2022

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In this paper, the structural, thermal, optical, and spectroscopic properties of Er 3+ -doped tellurite glasses with the composition 68.25TeO 2 -19.5ZnO-9.75X-2.5Er 2 O 3 (in mol%) with X = BaO, Na 2 O, and Bi 2 O 3 are reported. The glasses were prepared using the standard melt quenching method. The investigated glasses exhibit low phonon energy (∼745 cm −1 ) and low glass transition temperature varying between 300 and 350 • C depending on the glass composition. The Raman spectra show a regular tellurite structure with variations in the number of bridging and non-bridging oxygens depending on the glass composition, the Na 2 O and Bi 2 O 3 -containing glasses having the most and the least polymerized network, respectively. A thermal treatment of the glasses leads to the formation of crystals, the composition of which depends on the glass composition, as revealed by X-ray diffraction analysis and confirmed using scanning electron microscope-energydispersive spectroscopy. The precipitation of Er-containing crystals in the Na 2 O and BaO-containing glasses leads to an increase in the intensity of the upconversion emissions. Although the Er 3+ ions remain in the amorphous part of the Bi 2 O 3 -containing glass after heat treatment, it is the precipitation of Bi 3.2 Te 0.8 O 6.4 crystals in this glass, which is thought to decrease the distance between the Er 3+ ions leading to an increase in the intensity of the upconversion and mid-infrared emissions.

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Section: Resultssupporting

confidence: 85%

Section: Resultssupporting

confidence: 83%

Study of visible, NIR, and MIR spectroscopic properties of Er³⁺‐doped tellurite glasses and glass–ceramics

et al. 2022

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“…6a). The mean size of the crystallites is estimated using the Scherrer's equation as in [26] and is estimated to be 16 nm in the Yb1 glass-ceramics, similar to the one reported in Er 3+ doped glass in the same glass system [26,34]. The mean size of the crystallites increases slightly to ∼24 nm when the concentration of Yb 2 O 3 increases to 3 mol%.…”

Section: Resultssupporting

confidence: 72%

Near-infrared rechargeable glass-based composites for green persistent luminescence

Arango

Vuori

Byron

et al. 2022

Journal of Alloys and Compounds

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“…Transparent glass-ceramics in the NaPO 3 -CaF 2 system were successfully prepared with enhanced upconversion properties compared to the base glasses, due to the volume precipitation of Er 3+ doped CaF 2 crystals occurring during heat-treatment [14]. The onset of crystallization was reported to be largely different than the maximum nucleation temperature of glasses, independently of the glass composition, indicating that the nucleation and growth of the crystals can be controlled.…”

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confidence: 99%

Tailoring the Glass Composition to Increase the Thermal Stability without Impacting the Crystallization Behavior of Oxyfluorophosphate Glass

et al. 2021

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Even though the (75 NaPO3-25 CaF2) (in mol%) glass can be heat-treated into transparent glass-ceramic with Er3+ doped CaF2 crystals precipitating in the volume of the glass during heat-treatment, this glass was found to be a poor glass former, limiting its use as upconverter under 975 nm pumping. In this study, the impact of the glass composition on the thermal, optical and structural properties of the glass was investigated in order to understand how the glass composition can be tailored for the development of thermally stable upconverter glass-based material. The addition of MgO, Fe2O3 and Al2O3 in the NaPO3-CaF2 glass system increases the thermal stability of glass due to the depolymerization of the glass network. However, the changes in the glass composition also impacted on the nucleation and growth process. Indeed, CaF2 and other crystals were found in the newly developed glasses after heat-treatment leading to glass-ceramics with lower intensity of upconversion than the (75 NaPO3-25 CaF2) glass-ceramic used as a reference. Glasses were also prepared with different concentrations of Er2O3 and ErF3. These glasses were found to be promising as not only are they thermally stable, but they also exhibit green and red emission with high intensity under 975 nm pumping due to Er3+ clustering.

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Nucleation and growth behavior of Er³⁺ doped oxyfluorophosphate glasses

Abstract:
The nucleation and growth behavior of glasses with the composition (75 NaPO₃-25 CaF₂)_100−x–(TiO₂/ZnO/MgO)_x, with x = 0 and x = 1.5 (in mol%) is investigated.

Cited by 11 publications

References 54 publications

Study of visible, NIR, and MIR spectroscopic properties of Er³⁺‐doped tellurite glasses and glass–ceramics

Study of visible, NIR, and MIR spectroscopic properties of Er³⁺‐doped tellurite glasses and glass–ceramics

Near-infrared rechargeable glass-based composites for green persistent luminescence

Tailoring the Glass Composition to Increase the Thermal Stability without Impacting the Crystallization Behavior of Oxyfluorophosphate Glass

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Nucleation and growth behavior of Er3+ doped oxyfluorophosphate glasses

Abstract: The nucleation and growth behavior of glasses with the composition (75 NaPO3-25 CaF2)100−x–(TiO2/ZnO/MgO)x, with x = 0 and x = 1.5 (in mol%) is investigated.

Cited by 11 publications

References 54 publications

Study of visible, NIR, and MIR spectroscopic properties of Er3+‐doped tellurite glasses and glass–ceramics

Study of visible, NIR, and MIR spectroscopic properties of Er3+‐doped tellurite glasses and glass–ceramics

Near-infrared rechargeable glass-based composites for green persistent luminescence

Tailoring the Glass Composition to Increase the Thermal Stability without Impacting the Crystallization Behavior of Oxyfluorophosphate Glass

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Product

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Nucleation and growth behavior of Er³⁺ doped oxyfluorophosphate glasses

Abstract:
The nucleation and growth behavior of glasses with the composition (75 NaPO₃-25 CaF₂)_100−x–(TiO₂/ZnO/MgO)_x, with x = 0 and x = 1.5 (in mol%) is investigated.

Study of visible, NIR, and MIR spectroscopic properties of Er³⁺‐doped tellurite glasses and glass–ceramics

Study of visible, NIR, and MIR spectroscopic properties of Er³⁺‐doped tellurite glasses and glass–ceramics