Enhancement of luminescence properties of SrAl2Si2O8: Eu3+ red phosphor

Li, Xin; Yang, Cheng Fu; Liu, Quansheng; Wang, Xiaochun; Mi, Xiangcheng

doi:10.1016/j.ceramint.2020.04.027

Cited by 52 publications

(18 citation statements)

References 36 publications

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“…Meanwhile, it can be observed that there are some intense peaks in the emission spectra at about 579, 587, 617, 655 and 702 nm under 393 nm excitation, which are associated with the transitions from 5 D0 to 7 Fj (j=0, 1, 2, 3, 4), respectively, originating from the intra 4f-4f electronic transitions of Eu 3+ . Generally, the characteristic transition ( 5 D0→ 7 F2) of Eu 3+ as a main emission peak is related to the electronic dipole transition, and exhibited a intense peak at around 617 nm excitation in phosphors, such as SrAl2Si2O8: Eu 3+ and Y2Mg2Al2Si2O12: Eu 3+ phosphors[40,41]. The PL emission spectra for different Eu 3+ concentrations were depicted in Fig.4b, which are very similar with those in the Fig.4a.…”

supporting

confidence: 75%

Sol-Gel Auto-Combustion Synthesis and Luminescence Properties of GdCaAl3O7:RE3+(RE=Eu, Tb, Eu@Tb) Phosphors For Near-Ultraviolet Light-Triggered Indoor Illumination

Zhou¹,

Chen²,

Jiang³

et al. 2021

Preprint

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The color-tunable GdCaAl3O7: RE3+ (RE=Eu, Tb, Eu@Tb) phosphors were synthesized via an ultrafast sol-gel auto-combustion synthesis method. The XRD (X-ray diffraction) patterns confirmed the forming of GdCaAl3O7 tetragonal phase, and the SEM (Scanning electron microscopy) images indicated that the obtained products presented honeycomb-like structure due to the gas releasing during the auto-combustion process. The EDS (Energy dispersion spectra) results suggest that Eu3+ and Tb3+ were well incorporated into the host matrices of GdCaAl3O7. The luminescent properties, concentration quenching mechanism, energy transfer mechanism, luminescent dynamics, thermal stability and product practicability of GdCaAl3O7: R3+ (RE=Eu, Tb, Eu@Tb) phosphors were investigated systematically. All the GdCaAl3O7: RE3+ (RE=Eu, Tb, Eu@Tb) products presented the characteristic emission of doped RE3+. Using GdCaAl3O7: 50% Tb3+@3.0% Eu3+ as yellow-emitting phosphors in combination with commercial BAM: Eu2+ blue-emitting phosphors and a NUV chip can successfully package a warm white LED device with high color rendering index (CRI, 86.3) and low correlated color temperature (CCT, 3348 K) that was very suitable for near-ultraviolet light-triggered indoor illumination.

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supporting

confidence: 75%

Sol-Gel Auto-Combustion Synthesis and Luminescence Properties of GdCaAl3O7:RE3+(RE=Eu, Tb, Eu@Tb) Phosphors For Near-Ultraviolet Light-Triggered Indoor Illumination

Zhou¹,

Chen²,

Jiang³

et al. 2021

Preprint

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“…Eu 3+ and Y2Mg2Al2Si2O12: Eu 3+ phosphors [40,41]. The PL emission spectra for different Eu 3+ concentrations were depicted in Fig.…”

Section: Luminescent Properties Of Gdcaal3o7: X% Eu 3+mentioning

confidence: 99%

Sol-gel auto-combustion synthesis and luminescence properties of GdCaAl3O7: RE3+ (RE=Eu, Tb, Eu@Tb) phosphors for near-ultraviolet light-triggered indoor illumination

Zhou

Jiang

Chen

et al. 2022

Journal of Luminescence

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The color-tunable GdCaAl3O7: RE 3+ (RE=Eu, Tb, Eu@Tb) phosphors were synthesized via an ultrafast sol-gel auto-combustion synthesis method. The XRD (X-ray diffraction) patterns confirmed the forming of GdCaAl3O7 tetragonal phase, and the SEM (Scanning electron microscopy) images indicated that the obtained products presented honeycomb-like structure due to the gas releasing during the auto-combustion process. The EDS (Energy dispersion spectra) results suggest that Eu 3+ and Tb 3+ were well incorporated into the host matrices of GdCaAl3O7. The luminescent properties, concentration quenching mechanism, energy transfer mechanism, luminescent dynamics, thermal stability and product practicability of GdCaAl3O7: R 3+ (RE=Eu, Tb, Eu@Tb) phosphors were investigated systematically. All the GdCaAl3O7: RE 3+ (RE=Eu, Tb, Eu@Tb) products presented the characteristic emission of doped RE 3+ . Using GdCaAl3O7: 50% Tb 3+ @3.0% Eu 3+ as yellow-emitting phosphors in combination with commercial BAM: Eu 2+ blue-emitting phosphors and a NUV chip can successfully package a warm white LED device with high color rendering index (CRI, 86.3) and low correlated color temperature (CCT, 3348 K) that was very suitable for near-ultraviolet light-triggered indoor illumination.

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“…The second method is to mix the blue, green, and red emissions generated from three or two blended powders. Rare-earth-doped (RE) phosphates are a good candidate for the formation of white LEDs due to their good physical and chemical stability, low cost of substrates, and reduced preparation temperatures compared to silicates, aluminosilicates, or nitrates [8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Structural and Luminescence Behavior of Nanocrystalline Orthophosphate KMeY(PO4)2: Eu3+ (Me = Ca, Sr) Synthesized by Hydrothermal Method

et al. 2022

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KMeY(PO4)2:5% Eu3+ phosphates have been synthesized by a novel hydrothermal method. Spectroscopic, structural, and morphological properties of the obtained samples were investigated by X-ray, TEM, Raman, infrared, absorption, and luminescence studies. The microscopic analysis of the obtained samples showed that the mean diameter of synthesized crystals was about 15 nm. The KCaY(PO4)2 and KSrY(PO4)2 compounds were isostructural and they crystallized in a rhabdophane-type hexagonal structure with the unit-cell parameters a = b ≈ 6.90 Å, c ≈ 6.34 Å, and a = b ≈ 7.00 Å, c ≈ 6.42 Å for the Ca and Sr compound, respectively. Spectroscopic investigations showed intense 5D0 → 7F4 transitions connected with D2 site symmetry of Eu3+ ions. Furthermore, for the sample annealed at 500 °C, europium ions were located in two optical sites, on the surface of grains and in the bulk. Thermal treatment of powders at high temperature provided better grain crystallinity and only one position of dopant in the crystalline structure. The most intense emission was possessed by the KSrY(PO4)2: 5%Eu3+ sample calcinated at 500 °C.

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Enhancement of luminescence properties of SrAl2Si2O8: Eu3+ red phosphor

Cited by 52 publications

References 36 publications

Sol-Gel Auto-Combustion Synthesis and Luminescence Properties of GdCaAl3O7:RE3+(RE=Eu, Tb, Eu@Tb) Phosphors For Near-Ultraviolet Light-Triggered Indoor Illumination

Sol-Gel Auto-Combustion Synthesis and Luminescence Properties of GdCaAl3O7:RE3+(RE=Eu, Tb, Eu@Tb) Phosphors For Near-Ultraviolet Light-Triggered Indoor Illumination

Sol-gel auto-combustion synthesis and luminescence properties of GdCaAl3O7: RE3+ (RE=Eu, Tb, Eu@Tb) phosphors for near-ultraviolet light-triggered indoor illumination

Structural and Luminescence Behavior of Nanocrystalline Orthophosphate KMeY(PO4)2: Eu3+ (Me = Ca, Sr) Synthesized by Hydrothermal Method

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