Tunable upconversion emission in NaLuF4–glass-ceramic fibers doped with Er3+ and Yb3+

Gorni, Giulio; Velázquez, J. J.; Kochanowicz, Marcin; Dorosz, Dominik; Balda, Rolindes; Fernández, J.; Durán, Alicia; Pascual, María J.

doi:10.1039/c9ra05182a

Cited by 22 publications

(15 citation statements)

References 56 publications

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“…Many photonic applications are based on active waveguide systems. Currently, active hybrid structures are proposed, in which crystalline phases are introduced within the amorphous matrix using various methods, including thermal treatment [1], direct doping [2], chemical vapor deposition (CVD) [3], and 3D printing [4]. All of these methods require glasses with modified structural properties, ensuring the conditions for obtaining new luminescent properties (from embedded active structures) while maintaining the stability of the hybrid system [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Luminescent Studies on Germanate Glasses Doped with Europium Ions for Photonic Applications

et al. 2020

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Glass and ceramic materials doped with rare earth (RE) ions have gained wide interest in photonics as active materials for lasers, optical amplifiers, and luminescent sensors. The emission properties of RE-doped glasses depend on their chemical composition, but they can also be tailored by modifying the surrounding active ions. Typically, this is achieved through heat treatment (including continuous-wave and pulsed lasers) after establishing the ordering mechanisms in the particular glass–RE system. Within the known systems, silicate glasses predominate, while much less work relates to materials with lower energy phonons, which allow more efficient radiation sources to be constructed for photonic applications. In the present work, the luminescent and structural properties of germanate glasses modified with phosphate oxide doped with Eu3+ ions were investigated. Europium dopant was used as a “spectroscopic probe” in order to analyze the luminescence spectra, which characterizes the changes in the local site symmetries of Eu3+ ions. Based on the spectroscopic results, a strong influence of P2O5 content was observed on the excitation and luminescence spectra. The luminescence study of the most intense 5D0→7F2 (electric dipole) transition revealed that the increase in the P2O5 content leads to the linewidth reduction (from 15 nm to 10 nm) and the blue shift (~2 nm) of the emission peak. According to the crystal field theory, the introduction of P2O5 into the glass structure changes the splitting number of sublevels of the 5D0→7F1 (magnetic dipole) transition, confirming the higher polymerization of fabricated glass. The slightly different local environment of Eu3+ centers the results in a number of sites and causes inhomogeneous broadening of spectral lines. It was found that the local asymmetry ratio estimated by the relation of (5D0→7F2)/(5D0→7F1) transitions also confirms greater changes in local symmetry around Eu3+ ions. Our results indicate that modification of germanate glass by P2O5 allows control of their structural properties in order to functionalize the emissions for application as luminescent light sources and sensors.

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Section: Introductionmentioning

confidence: 99%

Luminescent Studies on Germanate Glasses Doped with Europium Ions for Photonic Applications

et al. 2020

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“…Taking into account the effect of the dopant addition on the glass T g and our previous results, 28–30,35 the heat treatment temperature and time were selected as 600°C during 20 h. Figure 1A shows the XRD patterns of the corresponding GCs samples. The results for the different dopant concentrations are almost identical with the diffraction maxima that are assigned to sodium lutetium fluoride cubic solid solution with a general formula Na x Lu 2x‐1 F 7x‐3 as previously reported in 28,30 .…”

Section: Resultsmentioning

confidence: 99%

“…Moreover, many different energy transfer channels are possible between Yb 3+ -Tm 3+ due to the existence of significant resonance energy levels. 27 In our previous works, [28][29][30] sodium lutetium fluoride glass-ceramics doped with ErF 3 and codoped with ErF 3 -YbF 3 were studied in detail from a structural and optical perspective and for their suitable use in optical fibers. Transparent GCs based on a cubic solid solution Na x Lu 2x−1 F 7x−3 were successfully synthesized and the incorporation of RE 3+ ions was confirmed by XRD and energy dispersive X-ray spectroscopy (EDX).…”

Section: Introductionmentioning

confidence: 99%

Structural and optical properties in Tm³⁺/Tm³⁺–Yb³⁺ doped NaLuF₄ glass‐ceramics

Velázquez

Balda

Fernández

et al. 2021

Int J of Appl Glass Sci

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“…It is noteworthy that the intense green luminescence bands (located around 530 nm) are observed in all the GCs, which are ascribed to 2 H 11/2 , 4 S 3/2 → 4 I 15/2 transitions, while almost no red emission (located around 660 nm) is observed, especially in S10A3-(0.1Er) GCs. In the other Er 3+ -doped fluoride crystals, such as NaYF 4 , ,− NaLuF 4 , , NaScF 4 , CaF 2 , , and PbF 2 , , both intense red and green luminescence, or only intense red luminescence was observed. Single green upconversion luminescence is rarely reported, which can be used as the green light source of LEDs, 3D displays, and so forth.…”

Section: Luminescence Properties Of Er3+-doped Glass Ceramicsmentioning

confidence: 99%

Clarifying a Competitive Crystallization Mechanism of Upconversion Luminescent Oxyfluoride Glass Ceramics by Solid-State NMR Spectroscopy

Zhang

et al. 2021

Inorg. Chem.

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glass system by adjusting their compositions. The structural evolution at the atomic level driven by heat treatment and glass compositions was studied using the state-of-the-art magic-angle spinning nuclear magnetic resonance technique. From a comprehensive local structural study, we found that LaF 3 and NaLaF 4 crystals compete in crystallization in these glasses. The crystallization ability of NaLaF 4 increases with the increase of the content of Na + ions within the F-enriched phase, but for LaF 3 crystals, it is reverse. These two crystals can be selectively precipitated in the glasses by adjusting the content of these Na + ions within the F-enriched phase. When the crystallization ability of these two crystals becomes similar, none of them can be precipitated due to their mutual interference in crystallization. Intense single green upconversion luminescence occurs in glasses precipitating LaF 3 or NaLaF 4 crystals. The underlying relationship between compositions, structures, crystallization, and upconversion luminescence properties is unearthed based on the structural evolution, crystallization mechanism, and luminescence properties. This relationship will facilitate the compositional design of these kinds of glasses. It is inferred that it will be better to precipitate LaF 3 rather than NaLaF 4 crystals for achieving highly efficient upconversion luminescence.

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Tunable upconversion emission in NaLuF₄–glass-ceramic fibers doped with Er³⁺ and Yb³⁺

Abstract: Novel glass-ceramic optical fibers containing NaLuF4 nanocrystals doped with 0.5ErF3 and 2YbF3 (mol%) have been prepared by the rod-in-tube method and controlled crystallization.

Cited by 22 publications

References 56 publications

Luminescent Studies on Germanate Glasses Doped with Europium Ions for Photonic Applications

Luminescent Studies on Germanate Glasses Doped with Europium Ions for Photonic Applications

Structural and optical properties in Tm³⁺/Tm³⁺–Yb³⁺ doped NaLuF₄ glass‐ceramics

Clarifying a Competitive Crystallization Mechanism of Upconversion Luminescent Oxyfluoride Glass Ceramics by Solid-State NMR Spectroscopy

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Tunable upconversion emission in NaLuF4–glass-ceramic fibers doped with Er3+ and Yb3+

Abstract: Novel glass-ceramic optical fibers containing NaLuF4 nanocrystals doped with 0.5ErF3 and 2YbF3 (mol%) have been prepared by the rod-in-tube method and controlled crystallization.

Cited by 22 publications

References 56 publications

Luminescent Studies on Germanate Glasses Doped with Europium Ions for Photonic Applications

Luminescent Studies on Germanate Glasses Doped with Europium Ions for Photonic Applications

Structural and optical properties in Tm3+/Tm3+–Yb3+ doped NaLuF4 glass‐ceramics

Clarifying a Competitive Crystallization Mechanism of Upconversion Luminescent Oxyfluoride Glass Ceramics by Solid-State NMR Spectroscopy

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Tunable upconversion emission in NaLuF₄–glass-ceramic fibers doped with Er³⁺ and Yb³⁺

Structural and optical properties in Tm³⁺/Tm³⁺–Yb³⁺ doped NaLuF₄ glass‐ceramics