Effect of BaF2 on the structural and spectroscopic properties of Er3+/Yb3+ ions codoped fluoro-tellurite glasses

Maaoui, A.; Haouari, Mohamed; Bulou, A.; Boulard, B.; Ouada, H. Ben

doi:10.1016/j.jlumin.2017.12.001

Cited by 22 publications

(6 citation statements)

References 72 publications

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“…The majority of works use glasses or glass ceramics. [47][48][49][50] Although these articles provide some insight into their UC behaviour, a more extensive study of optical properties is required in order to get a more detailed picture of UC properties of BaF 2 -based materials. Thus, the focus of this work is i) to assess how efficient UC in the BaF 2 host can be via measurements of absolute quantum yield in an integrating sphere ( UC ) for different concentrations of the doping ions and ii) to provide more detailed understanding of UC mechanism in the BaF 2 host (via study of both UC and DS luminescent properties).…”

Section: Introductionmentioning

confidence: 99%

An up-conversion luminophore with high quantum yield and brightness based on BaF₂:Yb³⁺,Er³⁺ single crystals

et al. 2021

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Section: Introductionmentioning

confidence: 99%

An up-conversion luminophore with high quantum yield and brightness based on BaF₂:Yb³⁺,Er³⁺ single crystals

et al. 2021

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“…The influence of glass-modifier BaF 2 on the positions of luminescence bands of rare earth ions and their relative integrated intensities was examined in detail. The previously published works have been well demonstrated that spectroscopic properties of rare earth ions are changed significantly in tellurite [4], phosphate [5], germanate [6,7,8] and borate [9] glasses, where BaO was substituted by BaF 2 .…”

Section: Introductionmentioning

confidence: 99%

Reddish-Orange Luminescence from BaF2:Eu3+ Fluoride Nanocrystals Dispersed in Sol-Gel Materials

et al. 2019

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Nanocrystalline transparent BaF2:Eu3+ glass-ceramic materials emitting reddish-orange light were fabricated using a low-temperature sol-gel method. Several experimental techniques were used to verify structural transformation from precursor xerogels to sol-gel glass-ceramic materials containing fluoride nanocrystals. Thermal degradation of xerogels was analyzed by thermogravimetric analysis (TG) and differential scanning calorimetry method (DSC). The presence of BaF2 nanocrystals dispersed in sol-gel materials was confirmed by the X-ray diffraction (XRD) analysis and transmission electron microscopy (TEM). In order to detect structural changes in silica network during annealing process, the infrared spectroscopy (IR-ATR) was carried out. In particular, luminescence spectra of Eu3+ and their decays were examined in detail. Some spectroscopic parameters of Eu3+ ions in glass-ceramics containing BaF2 nanocrystals were determined and compared to the values obtained for precursor xerogels. It was observed, that the intensities of two main red and orange emission bands corresponding to the 5D0→7F2 electric-dipole transition (ED) and the 5D0→7F1 magnetic-dipole (MD) transition are changed significantly during transformation from xerogels to nanocrystalline BaF2:Eu3+ glass-ceramic materials. The luminescence decay analysis clearly indicates that the measured lifetime 5D0 (Eu3+) considerably enhanced in nanocrystalline BaF2:Eu3+ glass-ceramic materials compared to precursor xerogels. The evident changes in luminescence spectra and their decays suggest the successful migration of Eu3+ ions from amorphous silica network to low-phonon BaF2 nanocrystals.

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“…Finally, it can be seen from figure 12 that the maximum phonon energy [68][69][70][71] of all the examined glasses are nearly the same, which are in the range of 736-740 cm −1 . These values are slightly lower than most of tellurite glasses [63,72] but significantly lower than silicate glasses [73,74], borate glasses [75], phospahate glasses [76].…”

Section: Raman Spectramentioning

confidence: 80%

“…Having such low phonon energy, doping rare earth ions in the examined glasses can result in low multi-phonon relaxation rate and therefore increase luminescence efficiency [69,71]. These glasses can therefore be considered as a good glass matrix for fluorescent ions like Nd 3+ , Tm 3+ , etc.…”

Section: Raman Spectramentioning

confidence: 99%

Effect of B₂O₃ addition on thermal and optical properties of TeO₂–ZnO–Bi₂O₃–TiO₂ glasses

Marzuki

Ega

Saraswati

2022

Mater. Res. Express

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New tellurite glasses with composition (in mol%): 60TeO2–(30-x)ZnO–5Bi2O3–5TiO2-xB2O3 (where x = 0, 2.5, 5.0, 7.5 and 10.0) were fabricated using conventional melt quenching method. Compositional dependence of the glasses on their density, thermal, refractive index and optical properties were investigated. X-Ray Diffraction analysis was carried out to confirm the nature of the thus formed glasses. Density, refractive index, and absorption spectra were measured at room temperature from which other glass characteristics such as polaron radius, oxygen packing density, field strength, B3+ interatomic distance, band gap energy, and Urbach tail were determined. Thermal characterisation to determine the change in glass transition temperature, glass crystallisation, melting point, and glass stability was carried out using Differential Scanning Calorimetry. A discussion was made in order to understand the results in terms of the ratio of bridging oxygen to non-bridging oxygen ions (BO/NBO). It was found that the addition of B2O3 results in increasing oxygen packing density, glass transition temperature, BO/NBO ratio and band gap energy, while decreasing density, refractive index, field strength, glass stability and Urbach tail energy. With increasing B2O3 concentration density changed from 5.879 to 5.646 g/cm3, refractive index 1.875 to 1.741, working temperature range (ΔT = 660C) and phonon energy within the range of 736 – 740 cm-1.

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Effect of BaF2 on the structural and spectroscopic properties of Er3+/Yb3+ ions codoped fluoro-tellurite glasses

Cited by 22 publications

References 72 publications

An up-conversion luminophore with high quantum yield and brightness based on BaF₂:Yb³⁺,Er³⁺ single crystals

An up-conversion luminophore with high quantum yield and brightness based on BaF₂:Yb³⁺,Er³⁺ single crystals

Reddish-Orange Luminescence from BaF2:Eu3+ Fluoride Nanocrystals Dispersed in Sol-Gel Materials

Effect of B₂O₃ addition on thermal and optical properties of TeO₂–ZnO–Bi₂O₃–TiO₂ glasses

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Effect of BaF2 on the structural and spectroscopic properties of Er3+/Yb3+ ions codoped fluoro-tellurite glasses

Cited by 22 publications

References 72 publications

An up-conversion luminophore with high quantum yield and brightness based on BaF2:Yb3+,Er3+ single crystals

An up-conversion luminophore with high quantum yield and brightness based on BaF2:Yb3+,Er3+ single crystals

Reddish-Orange Luminescence from BaF2:Eu3+ Fluoride Nanocrystals Dispersed in Sol-Gel Materials

Effect of B2O3 addition on thermal and optical properties of TeO2–ZnO–Bi2O3–TiO2 glasses

Contact Info

Product

Resources

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An up-conversion luminophore with high quantum yield and brightness based on BaF₂:Yb³⁺,Er³⁺ single crystals

An up-conversion luminophore with high quantum yield and brightness based on BaF₂:Yb³⁺,Er³⁺ single crystals

Effect of B₂O₃ addition on thermal and optical properties of TeO₂–ZnO–Bi₂O₃–TiO₂ glasses