From structure to luminescence investigation of oxyfluoride transparent glasses and glass-ceramics doped with Eu3+/Dy3+ ions

Walas, Michalina; Lisowska, Marta; Lewandowski, Tomasz; Becerro, Ana Isabel; Łapiński, Marcin; Synak, Anna; Sadowski, W.; Kościelska, Barbara

doi:10.1016/j.jallcom.2019.07.017

Cited by 29 publications

(10 citation statements)

References 37 publications

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“…Unfortunately, only a few studies have been conducted on oxyfluoride tellurite glass-ceramics [26,27,28]. Rajesh and Camargo [26] proposed oxyfluoride tellurite glasses and glass-ceramics containing NaYF 4 nanocrystals doped with variable concentration of Nd 3+ in the TeO 2 -ZnO-YF 3 -NaF-xNd 2 O 3 (x = 0.2, 0.5, 1.0, 1.5, and 2.0 mol%) system for 1.06 µm emission.…”

Section: Introductionmentioning

confidence: 99%

“…Rajesh and Camargo [26] proposed oxyfluoride tellurite glasses and glass-ceramics containing NaYF 4 nanocrystals doped with variable concentration of Nd 3+ in the TeO 2 -ZnO-YF 3 -NaF-xNd 2 O 3 (x = 0.2, 0.5, 1.0, 1.5, and 2.0 mol%) system for 1.06 µm emission. Transparent oxyfluoride glass-ceramics with SrF 2 nanocrystals have been prepared in the system of TeO 2 -BaO-Bi 2 O 3 -SrF 2 -2RE 2 O 3 (RE = Eu, Dy) [27]. Transparent oxyfluoride tellurite glasses with the composition of TeO 2 -SiO 2 -AlF 3 -CaO-NaF-yHoF 3 ( y = 0.5, 1, 1.5, 2.0, 3.0) were synthesized by Hou et al [28].…”

Section: Introductionmentioning

confidence: 99%

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Spectroscopic Properties of Erbium-Doped Oxyfluoride Phospho-Tellurite Glass and Transparent Glass-Ceramic Containing BaF2 Nanocrystals

et al. 2019

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The ErF3-doped oxyfluoride phospho-tellurite glasses in the (40-x) TeO2-10P2O5-45 (BaF2-ZnF2) -5Na2O-xErF3 system (where x = 0.25, 0.50, 0.75, 1.00, and 1.25 mol%) have been prepared by the conventional melt-quenching method. The effect of erbium trifluoride addition on thermal, structure, and spectroscopic properties of oxyfluoride phospho-tellurite precursor glass was studied by differential scanning calorimetry (DSC), Fourier-transform infrared (FTIR), and Raman spectroscopy as well as emission measurements, respectively. The DSC curves were used to investigate characteristic temperatures and thermal stability of the precursor glass doped with varying content of ErF3. FTIR and Raman spectra were introduced to characterize the evolution of structure and phonon energy of the glasses. It was found that the addition of ErF3 up to 1.25 mol% into the chemical composition of phospho-tellurite precursor glass enhanced 2.7 µm emission and upconversion. By controlled heat-treatment process of the host glass doped with the highest content of erbium trifluoride (1.25 mol%), transparent erbium-doped phospho-tellurite glass-ceramic (GC) was obtained. X-ray diffraction analysis confirmed the presence of BaF2 nanocrystals with the average 16 nm diameter in a glass matrix. Moreover, MIR, NIR, and UC emissions of the glass-ceramic were discussed in detail and compared to the spectroscopic properties of the glass doped with 1.25 mol% of ErF3 (the base glass).

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Spectroscopic Properties of Erbium-Doped Oxyfluoride Phospho-Tellurite Glass and Transparent Glass-Ceramic Containing BaF2 Nanocrystals

et al. 2019

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“…Therefore, the processes of crystallization of glasses should consequently lead to an increase in this parameter. This behavior was observed, for example, in tellurite glass-ceramics containing SrF 2 nanocrystals [ 25 ]. The parameters Ω 2 and Ω 4 calculated for the BBO+10SrF 2 and BBO+20SrF 2 glasses before and after annealing were different, but the change due to crystallization depended on the initial amount of SrF 2 .…”

Section: Resultsmentioning

confidence: 84%

“…Long lifetime (τ 1 ) is correlated with higher symmetry of the crystal field, whereas short lifetime (τ 2 ) is associated with lower symmetry of the Eu 3+ surroundings. Thus, in glasses containing SrF 2 or PbF 2 nanocrystals, a long lifetime is attributed to Eu 3+ ions, which are located in the nanocrystals, and short lifetimes correspond to the ions incorporated into the amorphous matrix [ 24 , 25 , 37 , 39 ].…”

Section: Resultsmentioning

confidence: 99%

From Structure to Luminescent Properties of B2O3-Bi2O3-SrF2 Glass and Glass-Ceramics Doped with Eu3+ Ions

et al. 2021

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Glass-ceramics with the composition B2O3-Bi2O3-SrF2 were synthesized by the conventional melt-quenching technique and subsequent crystallization of the parental glasses. The temperature at which the ceramization was carried out was selected based on differential scanning calorimetry (DSC) analysis. The structure of the studied materials and the formation of SrF2 nanocrystals were confirmed by the Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) techniques. It was found that the amount of strontium fluoride introduced into the parental borate-bismuth glass has a significant impact on the growth of SrF2 nanocrystals. In particular, the influence of the crystalline SrF2 phase on luminescence intensity and kinetics was studied using Eu2O3-doped samples. An increase in luminescence intensity was observed in the samples in which SrF2 nanocrystals were formed. This is most likely related to the fact that some of the Eu3+ ions were (after annealing of the glass) located in the crystalline structure of strontium fluoride. This was confirmed both by the luminescence lifetime obtained based on the luminescence decay curves and the calculated Judd–Ofelt parameters, Ω2 and Ω4. The results achieved confirm that the glasses and glass-ceramics described in this work could be considered as a new phosphor for light-emitting diodes (LEDs).

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“…Oxyfluoride nano-glass-ceramics doped with optically active rare earth ions (RE 3+ ) have gained great attention due to their favorable behavior as a result of mixing the advantages of fluoride nanocrystals with an oxide glassy host [9][10][11][12][13]. Indeed, because of their undoubtedly outstanding properties, such a class of optical materials is indispensable in the development of optoelectronics, offering promising applications in optical thermometers [14][15][16][17], LEDs [18][19][20], waveguides [21], and lasers [22]. The optical properties of oxyfluoride nano-glass-ceramics depend on several fundamental factors.…”

Section: Introductionmentioning

confidence: 99%

Studies of Sol-Gel Evolution and Distribution of Eu3+ Ions in Glass–Ceramics Containing LaF3 Nanocrystals Depending on Initial Sols Composition

Pawlik

Szpikowska‐Sroka

Goryczka

et al. 2021

IJMS

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In this work, we performed a systematic analysis of the impact of selected chemical reagents used in sol-gel synthesis (i.e., N,N-dimethylformamide) and different catalyst agents (i.e., CH3COOH, HNO3) on the formation and luminescence of Eu3+-doped SiO2–LaF3 nano-glass–ceramics. Due to the characteristic nature of intra-configurational electronic transitions of Eu3+ ions within the 4f6 manifold (5D0 → 7FJ, J = 0–4), they are frequently used as a spectral probe. Thus, the changes in the photoluminescence profile of Eu3+ ions could identify the general tendency of rare earth materials to segregate inside low-phonon energy fluoride nanocrystals, which allows us to assess their application potential in optoelectronics. Fabricated sol-gel materials, from sols to gels and xerogels to nano-glass–ceramics, were examined using several experimental techniques: X-ray diffraction (XRD), transmission electron microscopy (TEM), infrared spectroscopy (IR), and luminescence measurements. It was found that the distribution of Eu3+ ions between the amorphous silicate sol-gel host and LaF3 nanocrystals is strictly dependent on the initial composition of the obtained sols, and the lack of N,N-dimethylformamide significantly promotes the segregation of Eu3+ ions inside LaF3 nanocrystals. As a result, we detected long-lived luminescence from the 5D0 excited state equal to 6.21 ms, which predisposes the obtained glass–ceramic material for use as an optical element in reddish-orange emitting devices.

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From structure to luminescence investigation of oxyfluoride transparent glasses and glass-ceramics doped with Eu3+/Dy3+ ions

Cited by 29 publications

References 37 publications

Spectroscopic Properties of Erbium-Doped Oxyfluoride Phospho-Tellurite Glass and Transparent Glass-Ceramic Containing BaF2 Nanocrystals

Spectroscopic Properties of Erbium-Doped Oxyfluoride Phospho-Tellurite Glass and Transparent Glass-Ceramic Containing BaF2 Nanocrystals

From Structure to Luminescent Properties of B2O3-Bi2O3-SrF2 Glass and Glass-Ceramics Doped with Eu3+ Ions

Studies of Sol-Gel Evolution and Distribution of Eu3+ Ions in Glass–Ceramics Containing LaF3 Nanocrystals Depending on Initial Sols Composition

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