Influence of isomorphic substitution of Y3+ ions by Gd3+ ions on structural and luminescent properties of Yb:YAG nanopowders

Bulyga, D. V.; Evstropiev, S. K.; Sadovnichii, R. V.; Khodasevich, M.A.

doi:10.1016/j.mseb.2022.115980

Cited by 8 publications

(13 citation statements)

References 45 publications

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“…It is important to mention that the intensity of both the excitation and emission peaks does not consistently increase with higher temperatures during heat treatment, which suggests that excessively high temperatures during the heat treatment process do not promote the improvement of luminescence performance. As the radius of the Dy 3+ ion ( r = 0.91 Å) 78 is similar to the radius of the Gd 3+ ion ( r = 0.94 Å), 79 the introduced Dy 3+ ion is most likely to enter the Gd site in the NaGd(MoO 4 ) 2 crystal. Typically, crystals have lower phonon energy compared to glass 83,84 .…”

Section: Resultsmentioning

confidence: 94%

“…Among them, the diffraction peaks at 28.64°, 31.10°, 34.17°, 46.89°, 53.85°, 57.83°, and 59.26° correspond to the (1 1 2), (0 0 4), (2 0 0), (2 0 4), (2 2 0), (1 1 6), (3 1 2), and (2 2 4) planes of the NaGd(MoO 4 ) 2 phase in glass–ceramic, respectively. Upon careful observation, it has been found that the diffraction peaks exhibit a slight shift toward a higher angle when compared to the standard NaGd(MoO 4 ) 2 crystals due to the small radius Dy 3+ ions ( r = 0.91 Å 78 ) replacing the large radius Gd 3+ ion ( r = 0.94 Å) 79 sites in the NaGd(MoO 4 ) 2 crystals. In addition, the incorporation of a small amount of Dy 2 O 3 does not cause mutations in the diffraction peak, which means that the crystal structure does not show significant changes.…”

Section: Resultsmentioning

confidence: 99%

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Dy³⁺‐ and/or Sm³⁺‐doped glass–ceramics containing NaGd(MoO₄)₂ crystalline phase for warm white light applications

Tong,

Luo,

Liu

et al. 2024

J Am Ceram Soc.

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The transparent glass–ceramics with Dy3+ and/or Sm3+ doping, which include the NaGd(MoO4)2 single‐crystal phase, were synthesized using the melt‐quenching method followed by heat treatment in the SiO2–B2O3–Na2O–ZnO–MoO3–Gd2O3 system. The formation and fluorescent properties of Dy3+ single‐doped precursor glasses were thoroughly examined, and the optimal doping amount of Dy2O3 was determined to be 0.3 mol% by fluorescence spectroscopy. The ideal heat treatment procedure for glass–ceramics containing Dy3+ and Sm3+ was determined to be crystallized at a temperature of 650°C for a duration of 7 h. After undergoing heat treatment, the luminescence performance of glass–ceramic is significantly boosted, exhibiting an improvement that is roughly twice as substantial when compared to the precursor glass. Extensive research has been conducted to thoroughly examine the fluorescence capabilities of glass–ceramics doped with both Dy3+ and Sm3+, and the intricate mechanism of energy transfer has been extensively explored. The transparent glass–ceramics doped with Dy3+ and Sm3+ and containing NaGd(MoO4)2 crystal phase can produce tunable luminescence from yellow to orange with a high color purity and a low correlated color temperature, which indicates that they have the potential to be applied to warm white light scenes such as household lighting under ultraviolet excitation.

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Section: Resultsmentioning

confidence: 94%

Section: Resultsmentioning

confidence: 99%

Dy³⁺‐ and/or Sm³⁺‐doped glass–ceramics containing NaGd(MoO₄)₂ crystalline phase for warm white light applications

Tong,

Luo,

Liu

et al. 2024

J Am Ceram Soc.

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“…In Ref. [34], the authors synthesized a series of Yb:GdYAG nano‐powders with Gd 3+ contend from 3% to 80%. With the Gd 3+ content increasing, the average crystal size of these nano‐powders was decrease from 23 to 13 nm, and the authors explained that this phenomenon suggests that gadolinium addition retards crystallization of garnet 34 …”

Section: Resultsmentioning

confidence: 99%

“…With the Gd 3+ content increasing, the average crystal size of these nano-powders was decrease from 23 to 13 nm, and the authors explained that this phenomenon suggests that gadolinium addition retards crystallization of garnet. 34 The XRD patterns of the 10 at.% Yb:Gd x Y 3−x Al 5 O 12 block ceramics were measured and shown in Figure 5, and the Miller indices are also labeled. In all patterns, the baselines have been subtracted by the MDI Jade 6.5 software.…”

Section: Microstructures and Phase Compositionmentioning

confidence: 99%

Fabrication, microstructure, spectral properties, and laser performance of Yb:Gd_xY₃₋_xAl₅O₁₂ ceramics

Feng,

Liu,

Toci

et al. 2024

J Am Ceram Soc.

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Highly transparent 10 at.% Yb:GdxY3−xAl5O12 (x = 0.3, 0.5, and 0.7) ceramics were successfully fabricated by vacuum solid‐state reactive sintering at 1800°C for 20 h combined with hot isostatic pressing posttreatment at 1700°C for 3 h under 176 MPa pressure in Ar atmosphere. The in‐line transmittances of these ceramics with the thickness of 2.5 mm are 84.4%, 84.0%, and 83.5% at 1100 nm for x = 0.3, 0.5, and 0.7, respectively. The relationships of the Gd3+ content among the phase, microstructures, spectral, and laser properties of the Yb:GdxY3−xAl5O12 ceramics were elucidated in detail. The introduction of Gd3+ has a little influence on the crystal field strength of the Yb3+ sites in GdxY3−xAl5O12. The absorption, emission spectra, and fluorescence lifetime of the Yb3+ in these ceramics are similar, close to 10 at.% Yb:YAG ceramics. Quasi‐continuous wave laser outputs of the ceramics were also achieved. The maximum laser output powers are 7.8, 7.7, and 6.6 W with the corresponding slope efficiency as 46.2%, 44.7%, and 39.2% for x = 0.3, 0.5, and 0.7, respectively. The 7.8 W laser output power is the highest value achieved so far for the Yb:GdYAG ceramics, to the best of our knowledge. The previous discussions show that not all the mixed garnets could enhance full width at half maximum of absorption and emission peaks for the active ions; however, the Yb:GdYAG ceramics are still excellent laser gain media.

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“…For example, the generation of defects in ZnO allows modifying its luminescence spectra [8][9][10][11]. In addition to the formation of such defects as vacancies, interstitial hydrogen or other elements, it is possible to change smaterials' properties by using the partial substitution of some ions by ions with similar properties [12][13][14][15]. This approach allows changing the interatomic distances and crystal cell parameters.…”

Section: Introductionmentioning

confidence: 99%

YAG:Ce Nanophosphors Synthesized by the Polymer–Salt Method for White LEDs with Isomorphic Substitution of Yttrium by Gadolinium

et al. 2023

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Fine-dispersed YGdAG:Ce nanopowders with various degrees of isomorphic substitution of yttrium by gadolinium were synthesized. The structure and luminescent properties were studied by X-ray diffraction, attenuated total reflection Fourier-transform infrared spectroscopy, luminescence spectroscopy and scanning electron microscopy. The possibility of synthesis of YGdAG:Ce nanopowders with a degree of gadolinium substitution up to 60% and nanocrystals with average sizes of 25–30 nm were shown. The red-shift of the cerium luminescence band with an increase in Gd content was studied. The CIE diagram for emission of YGdAG:Ce synthesized by the polymer–salt method shows that the degree 30–40% substitution of Y by Gd is optimal for the fabrication of a white light source based on LED with an emission wavelength of 470 nm.

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Influence of isomorphic substitution of Y3+ ions by Gd3+ ions on structural and luminescent properties of Yb:YAG nanopowders

Cited by 8 publications

References 45 publications

Dy³⁺‐ and/or Sm³⁺‐doped glass–ceramics containing NaGd(MoO₄)₂ crystalline phase for warm white light applications

Dy³⁺‐ and/or Sm³⁺‐doped glass–ceramics containing NaGd(MoO₄)₂ crystalline phase for warm white light applications

Fabrication, microstructure, spectral properties, and laser performance of Yb:Gd_xY₃₋_xAl₅O₁₂ ceramics

YAG:Ce Nanophosphors Synthesized by the Polymer–Salt Method for White LEDs with Isomorphic Substitution of Yttrium by Gadolinium

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Influence of isomorphic substitution of Y3+ ions by Gd3+ ions on structural and luminescent properties of Yb:YAG nanopowders

Cited by 8 publications

References 45 publications

Dy3+‐ and/or Sm3+‐doped glass–ceramics containing NaGd(MoO4)2 crystalline phase for warm white light applications

Dy3+‐ and/or Sm3+‐doped glass–ceramics containing NaGd(MoO4)2 crystalline phase for warm white light applications

Fabrication, microstructure, spectral properties, and laser performance of Yb:GdxY3−xAl5O12 ceramics

YAG:Ce Nanophosphors Synthesized by the Polymer–Salt Method for White LEDs with Isomorphic Substitution of Yttrium by Gadolinium

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Product

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Dy³⁺‐ and/or Sm³⁺‐doped glass–ceramics containing NaGd(MoO₄)₂ crystalline phase for warm white light applications

Dy³⁺‐ and/or Sm³⁺‐doped glass–ceramics containing NaGd(MoO₄)₂ crystalline phase for warm white light applications

Fabrication, microstructure, spectral properties, and laser performance of Yb:Gd_xY₃₋_xAl₅O₁₂ ceramics