High energy transfer in Dy3+ /Sm3+co-doped transparent borosilicate glass-ceramics containing novel Na5Y9F32 nanocrystals for w-LEDs applications

Chen, Chao; Yu, Chengbing; Xu, Feng; Li, Qinling; Zhang, Yuepin

doi:10.1016/j.ceramint.2020.08.190

Cited by 31 publications

(24 citation statements)

References 27 publications

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“…In the interim, partial electrons located at the 4 F 9/2 level of Dy 3+ are relaxed to the 6 H 5/2 level of Sm 3+ by the resonance between the two levels, which ultimately gives rise to the characteristic emissions of Sm 3+ . 42 …”

Section: Resultsmentioning

confidence: 99%

“…With the populated4 F 9/2 level, the radiative transitions of Dy 3+ occurred with yellow and blue emissions due to the 4 F 9/2 / 6 H 15/2 , 6 H 13/2 , 6 H 11/2 transitions, respectively. In the interim, partial electrons located at the 4 F 9/2 level of Dy 3+ are relaxed to the 6 H 5/2 level of Sm 3+ by the resonance between the two levels, which ultimately gives rise to the characteristic emissions of Sm 3+ 42. 3.3.…”

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confidence: 99%

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Barium molybdate white emitting phosphor synthesized at room temperature by co-precipitation

Jung

2022

RSC Adv.

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Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

Barium molybdate white emitting phosphor synthesized at room temperature by co-precipitation

Jung

2022

RSC Adv.

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“…The energy transfer efficiency from Tb 3+ to Eu 3+ was measured using the following equation where τ s and τ so are the corresponding lifetime values of Tb 3+ when Eu 3+ is doped and not doped, respectively. The energy transfer efficiencies of the Si-3Tb@Lu- y Eu ( y = 1–6%) samples are 12.68, 18.60, 27.70, 34.67, 44.19, and 51.59%, respectively, as shown in Table .…”

Section: Resultsmentioning

confidence: 99%

SiO₂:Tb³⁺@Lu₂O₃:Eu³⁺ Core–Shell Phosphors: Interfacial Energy Transfer for Enhanced Multicolor Luminescence

et al. 2021

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Uniform and well-dispersed SiO2:x%Tb3+@Lu2O3:y%Eu3+ core–shell spherical phosphors were synthesized via a solvothermal method followed by a subsequent calcination process. The structure, phase composition, and morphology of the samples were studied by X-ray diffraction (XRD), thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FT-IR), field emission scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The results showed that the Lu2O3:Eu3+ layer was evenly coated on the surface of SiO2:Tb3+ spheres and the shell thickness was about 45–65 nm. The PL spectra and fluorescence lifetimes of the samples were further studied. It was proved that the multicolor luminescence of the samples could be realized by changing the doping concentration ratio of Eu3+ or by changing the excitation wavelengths. Compared with SiO2@Lu2O3:3%Tb3+,6%Eu3+, SiO2:3%Tb3+@Lu2O3:6%Eu3+ showed stronger luminescence intensity, longer fluorescence lifetime, and higher energy transfer efficiency, which was attributed to the effective interfacial energy transfer, and the interfacial energy transfer mechanism from Tb3+ to Eu3+ was a dipole–dipole interaction mechanism. The XPS results indicated that the sample contained a high content of Si–O–Lu bonds, which proved that there was a strong interaction between the SiO2 core and the Lu2O3 shell, making the interfacial energy transfer possible. These results provided a new idea for luminescence enhancement and multicolor luminescence.

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“…Recently, Chen et al 12 have studied borosilicate glass-ceramics containing Na 5 Y 9 F 32 nanocrystals and the relationship between the intensities of Dy 3+ and Sm 3+ ions as dopants. They prepared transparent glasses and glassceramics doped with Sm 3+ , Dy 3+ , and Sm 3+ /Dy 3+ , the molar compositions of the precursor glasses were 68SiO 2 .…”

Section: Introductionmentioning

confidence: 99%

“…Recently, Chen et al 12 . have studied borosilicate glass–ceramics containing Na 5 Y 9 F 32 nanocrystals and the relationship between the intensities of Dy 3+ and Sm 3+ ions as dopants.…”

Section: Introductionmentioning

confidence: 99%

Structure and luminescent properties of Sm/Dy‐doped Sr₂MgSi₂O₇ glass–ceramics

Fernández‐Rodríguez

Balda

Fernández

et al. 2022

Int J of Appl Glass Sci

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Sm 3+ -doped and Sm 3+ /Dy 3+ codoped SiO 2 -SrO-MgO glasses were prepared by conventional melt quenching and Sr 2 MgSi 2 O 7 based glass-ceramics from sintering and crystallization of the glass powders. The thermal, structural, and optical properties of the glasses and glass-ceramics were investigated as a function of the dopant concentration. The optical characterization includes the photoluminescence spectra and the lifetimes of the 4 G 5/2 (Sm 3+ ) and 4 F 9/2 (Dy 3+ ) excited states. In Sm 3+ single-doped samples, the emission intensity increases up to a concentration of 0.3 mol% Sm 3+ ions and then decreases due to nonradiative energy transfer processes. The emission spectra in the glass-ceramics show a more resolved structure and higher intensity compared to the glass samples, suggesting a different and crystalline environment for the Sm 3+ ions. The non-radiative processes also influence the experimental decays of the glass samples which deviate from a single exponential with lifetimes decreasing as Sm 3+ concentration increases. The emission and excitation spectra of the codoped samples do not show significant energy transfer between Sm 3+ and Dy 3+ ions. Different emitting colors can be obtained in the codoped glasses by changing the excitation wavelength. The studied glass-ceramics could be applied as enamels on ceramic or metallic substrates.

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High energy transfer in Dy3+ /Sm3+co-doped transparent borosilicate glass-ceramics containing novel Na5Y9F32 nanocrystals for w-LEDs applications

Cited by 31 publications

References 27 publications

Barium molybdate white emitting phosphor synthesized at room temperature by co-precipitation

Barium molybdate white emitting phosphor synthesized at room temperature by co-precipitation

SiO₂:Tb³⁺@Lu₂O₃:Eu³⁺ Core–Shell Phosphors: Interfacial Energy Transfer for Enhanced Multicolor Luminescence

Structure and luminescent properties of Sm/Dy‐doped Sr₂MgSi₂O₇ glass–ceramics

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High energy transfer in Dy3+ /Sm3+co-doped transparent borosilicate glass-ceramics containing novel Na5Y9F32 nanocrystals for w-LEDs applications

Cited by 31 publications

References 27 publications

Barium molybdate white emitting phosphor synthesized at room temperature by co-precipitation

Barium molybdate white emitting phosphor synthesized at room temperature by co-precipitation

SiO2:Tb3+@Lu2O3:Eu3+ Core–Shell Phosphors: Interfacial Energy Transfer for Enhanced Multicolor Luminescence

Structure and luminescent properties of Sm/Dy‐doped Sr2MgSi2O7 glass–ceramics

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SiO₂:Tb³⁺@Lu₂O₃:Eu³⁺ Core–Shell Phosphors: Interfacial Energy Transfer for Enhanced Multicolor Luminescence

Structure and luminescent properties of Sm/Dy‐doped Sr₂MgSi₂O₇ glass–ceramics