Massive production of A2SiO4:Eu3+ and A2SiO4:Eu2+ (A=Ca, Sr, Ba) microspheres and luminescent properties

Wei, Fengjun; Jia, Qiuli

doi:10.1016/j.spmi.2015.02.006

Cited by 16 publications

(13 citation statements)

References 22 publications

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“…Rare-earth-doped dicalcium silicate (Ca 2 SiO 4 , C 2 S) phosphors have been investigated by several researchers for application to white light-emitting diodes (LEDs) [1,2,3,4,5]. Two types of phosphors have been reported so far: Eu 3+ -doped and Eu 2+ -doped C 2 S phosphors.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, the luminescence originates from the 4f-4f dipole transitions of the Eu 3+ ion, and hence the wavelength of the emission is almost the same among the various phosphors with different host materials. For example, a group of A 2 SiO 4 : Eu 3+ (A = Ca, Sr, Ba) phosphors showed similar emission spectra at around the maximum wavelength of 620 nm [4]. On the other hand, Eu 2+ -doped C 2 S phosphors are generally useful for a wide range of applications, because their luminescent colors, due to the f-d transition of the Eu 2+ ion, are tunable by the crystal structures and/or compositions of the host materials.…”

Section: Introductionmentioning

confidence: 99%

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The Effect of Heat Treatment on the Emission Color of P-Doped Ca2SiO4 Phosphor

et al. 2017

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In a series of (Ca2–x/2–yEuy□x/2)(Si1–xPx)O4 (x = 0.06, 0.02 ≤ y ≤0.5), various color-emitting phosphors were successfully synthesized by a solid-state reaction. These phosphors were characterized by photoluminescence (PL) spectroscopy, X-ray powder diffractometry, transmission electron microscopy, and X-ray absorption fine structure spectroscopy. We evaluated the effect of heat treatment on PL properties with various annealing temperatures at 1373–1773 K for 4 h before/after reduction treatment from Eu3+ to Eu2+. In the red-emitting (Ca1.95Eu3+0.02□0.03)(Si0.94P0.06)O4+δ phosphor, the highest PL intensity exhibited when it was annealed at 1773 K. On the other hand, in the green-emitting (Ca1.95Eu2+0.02□0.03)(Si0.94P0.06)O4 phosphor, the highest PL intensity was realized when it was annealed at 1473 K and consequently treated under a reductive atmosphere. With increasing annealing temperature, the emission peak wavelength steadily decreased. Furthermore, with increasing Eu2+ content, the emission peak wavelength increased, with the color of emitting light becoming yellowish. Thus, the PL properties of the phosphors were affected by both the structural change from β to α’L, which occurred by heat treatment, and the amount of doped Eu ions.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Effect of Heat Treatment on the Emission Color of P-Doped Ca2SiO4 Phosphor

et al. 2017

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“…Therefore, a multitude of effects are devoted to design inorganic phosphor particles with well-defined size, uniform shape, and high crystallinity. To date, oceans of phosphors with various morphologies have been fabricated by different methods [7][8][9][10][11][12][13][14][15]. And it is widely accepted that one of the promising and popular strategies of shape and size control is to carefully select an appropriate organic additive with functional groups.…”

Section: Introductionmentioning

confidence: 99%

“…As a result, rare earth ions doped YPO 4 phosphors are of particular interest in the production of luminescent materials. And lots of rare earth ions doped YPO 4 phosphors with different sizes and nano/ micro structures have been synthesized by different methods [15,18,[20][21][22][23][24][25]. Among the rare earth ions, Eu 3?…”

Section: Introductionmentioning

confidence: 99%

Controllable synthesis and luminescence of YPO4:Ln3+ (Ln = Eu and Sm) nanotubes

Sun

2016

J Mater Sci: Mater Electron

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YPO 4 :Ln 3? (Ln = Eu and Sm) nanotubes were synthesized by a precipitation process in the presence of SDS. The XRD results showed that all samples have a xenotime type tetragonal structure, indicating that doped rare earth ions have no influence on the phase. The SEM and TEM images showed that all samples are nanotubes. On basis of the morphology of samples and the properties of SDS, the possible formation mechanism was speculated. YPO 4 :Eu 3? and YPO 4 :Sm 3? nanotubes showed characteristic emission bands of Eu 3? and Sm 3? ions, respectively. For YPO 4 :Eu 3? /Sm 3? nanotubes, the codoping Sm 3? ions can enhance the emission intensity of Eu 3? ions.

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“…Till now, lots of rare earth doped inorganic materials, including borate, phosphate, aluminate, tungstate, and silicate have been synthesized by different methods [1][2][3][4][5][6][7][8][9]. As one kind of important solid-state materials, rare-earth tungstates have gained much attention because of their remarkable properties in the areas of catalysts, quantum electronics and lasers [7].…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal synthesis of NaY(WO4)2:Tb3+ powders with assistance of surfactant and luminescence properties

Sun

2015

J Mater Sci: Mater Electron

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NaY(WO 4 ) 2 :Tb 3? powders with different sizes and morphologies were synthesized by the hydrothermal process. The surfactants and reaction times have obvious effects on sizes and morphologies of samples. When there is the addition of an equimolar combination of oleic acid and oleylamine and the reaction time of 10 h, uniform morphology of octahedron can be formed. As indicated by the FTIR spectra, the enhanced adsorption of oleic acid in the presence of oleylamine leads to the good formation of octahedral NaY(WO 4 ) 2 :Tb 3? powders. Surfactants will selectively absorb on the surface of the growing particles via physical and chemical effects, which leads to different growing rates along corresponding directions and induces the formation of octahedral morphology. Under the ultraviolet excitation, NaY(WO 4 ):Tb 3? powders show dominant green emission originating from the 5 D 4 ? 7 F 5 transition of Tb 3? ions.

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Massive production of A2SiO4:Eu3+ and A2SiO4:Eu2+ (A=Ca, Sr, Ba) microspheres and luminescent properties

Cited by 16 publications

References 22 publications

The Effect of Heat Treatment on the Emission Color of P-Doped Ca2SiO4 Phosphor

The Effect of Heat Treatment on the Emission Color of P-Doped Ca2SiO4 Phosphor

Controllable synthesis and luminescence of YPO4:Ln3+ (Ln = Eu and Sm) nanotubes

Hydrothermal synthesis of NaY(WO4)2:Tb3+ powders with assistance of surfactant and luminescence properties

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