Emission properties of Sm3+/Bi3+-doped YPO4 phosphors

Angiuli, Fabio; Cavalli, Enrico; Boutinaud, Philippe; Mahiou, Rachid

doi:10.1016/j.jlumin.2012.10.005

Cited by 24 publications

(11 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Raising the Bi 3+ amount further contributes to enhance the Eu 3+ emission intensity, and it correlates with a shortening of the lifetime. This effect has already been observed in YPO 4 :Sm 3+ , Bi 3+ and is ascribed to an increased refractive index of the host lattice . In this case, the radiative probability is increased, contributing to a lower emission lifetime.…”

Section: Resultsmentioning

confidence: 80%

Emission Enhancement and Energy Transfers in YV_0.5P_0.5O₄ Nanoparticles Codoped with Eu³⁺ and Bi³⁺ Ions

et al. 2022

View full text Add to dashboard Cite

In this study, solid-state solutions of yttrium orthovanadate-phosphate with varying concentrations of codopants (Eu 3+ , Bi 3+ ) have been obtained via coprecipitation. An ionic radii mismatch between V 5+ and P 5+ substituents is manifested in broad XRD lines. The sharpening of the XRD lines is observed with increasing bismuth ions concentration in the Eu 3+ codoped YV 0.5 P 0.5 O 4 matrix. The difference in the number of the Stark components for the 5 D 0 → 7 F J transitions indicates changes in the lattice and a number of possible Eu 3+ sites. A thorough, systematic spectroscopic analysis of YV 0.5 P 0.5 O 4 : x mol % Eu 3+ , y mol % Bi 3+ was conducted at room temperature and 5 K. Metal-to-metal energy transfers occurring between Eu 3+ , V 5+ , and Bi 3+ optically active ions have been investigated. Additionally, efficiency of the Bi 3+ -Eu 3+ energy transfer (ET) was calculated.

show abstract

Section: Resultsmentioning

confidence: 80%

Emission Enhancement and Energy Transfers in YV_0.5P_0.5O₄ Nanoparticles Codoped with Eu³⁺ and Bi³⁺ Ions

et al. 2022

View full text Add to dashboard Cite

show abstract

“…, enhances luminescence intensity and scintillation efficiency which makes it practically suitable candidate in scintillators industry 6,[22][23][24][25] .Further, dopedYPO4remains in the tetragonal phase. However, on increasing the concentration of Eu In X-ray diffraction, scattering is due to interaction of X-rays with the electronic charge cloud of atoms, whereas in neutron diffraction, scattering is due to interaction of neutron with nuclei of atoms.…”

Section: +mentioning

confidence: 99%

“…Yttrium orthophosphate, YPO4, also has the tetragonal symmetry (xenotime type) 6 . Doping YPO4 matrix with Ce 3+ and Eu 3+ , enhances luminescence intensity and scintillation efficiency which makes it practically suitable candidate in scintillators industry 6,[22][23][24][25] .Further, dopedYPO4remains in the tetragonal phase. However, on increasing the concentration of Eu 3+ in Ce 3+ doped YPO4 , a tetragonal to hexagonal phase transition occurs 6 .…”

Section: Introductionmentioning

confidence: 99%

Neutron diffraction reveals the existence of confined water in triangular and hexagonal channels of modified YPO4 at elevated temperatures

Mishra

Ningthoujam

Mittal

et al. 2017

Phys. Rev. Materials

View full text Add to dashboard Cite

We provide experimental evidence for confinement of water molecules in the pores of hexagonal structure of YPO4 at elevated temperatures upto 600 K using powder neutron diffraction. In order to avoid the large incoherent scattering from the hydrogen, deuterated samples of doped YPO4:Ce-Eu were used for diffraction measurements. The presence of water molecules in the triangular and hexagonal pores in the hexagonal structure was established by detailed simulation of the diffraction pattern and Rietveld refinement of the experimental data. It was observed that the presence of water leads specifically to suppression of the intensity of a peak around Q = 1.04 Å -1 while the intensity of peaks around Q=1.83Å -1 is enhanced in the neutron diffraction pattern. We estimate the number of water molecules as 2.36 (6) per formula units at 300 K and the sizes of the hexagonal and triangular pores as7.2 (1) Å and 4.5 (1) Å, respectively. With increase in temperature, the water content in both the pores decreases above 450 K and vanishes around 600 K. Analysis of the powder diffraction data reveals that the hexagonal structure with the pores persist up to 1273 K, and transforms to another structure at 1323 K. The high temperature phase is not found to have the zircon or the monazite type structure, but a monoclinic structure (space group P2/m) with lattice parameters am= 6.826 (4) Å, bm= 6.645 (4) Å, cm= 10.435 (9)Å, and β= 107.21 (6)°. The monoclinic structure has about 14 % smaller volume than the hexagonal structure which essentially reflects the collapse of the pores. The phase transition and the change in the volume are also confirmed by x-ray diffraction measurements. The hexagonal to the monoclinic phase transition is found to be irreversible on cooling to room temperature. 2 IntroductionRare-earth (RE) phosphates and its derivatives (REPO4:RE=La, Ce, Gd or Y) exhibit exotic properties like chemical stability, excellent high-temperature properties, high radiation damage tolerance, high luminescence quantum yield, high energy band gap, etc [1][2][3][4][5][6][7][8][9][10][11][12] . Due to a sharp emission, these compounds are also used as host for luminescence applications 6,7,13 including lasers and display devices. A combination of rare-earth phosphates and silicates is used as host for nuclear wastes 14 . At ambient condition, depending on the ionic radii of RE ion and synthesis route, the compounds can crystalize in tetragonal, hexagonal and monoclinic phases 13,[15][16][17][18] .A smaller ionic radius compared to the ionic radius of Gd generally adopts the tetragonal structure, whereas other orthophosphates have the lower-symmetry monoclinic structure. Depending on the synthesis conditions, GdPO4, TbPO4, DyPO4, and HoPO4 can adopt either zircon or monazite structure 13,16,[19][20][21] . LaPO4 crystallizes in two polymorphs, namely, the tetragonal phase (xenotime structure) and the monoclinic phase (monazite structure). Yttrium orthophosphate, YPO4, also has the tetragonal symmetry (xenotime type) 6 . Doping YPO4 matri...

show abstract

“…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

View full text Add to dashboard Cite

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.

show abstract

Emission properties of Sm3+/Bi3+-doped YPO4 phosphors

Cited by 24 publications

References 15 publications

Emission Enhancement and Energy Transfers in YV_0.5P_0.5O₄ Nanoparticles Codoped with Eu³⁺ and Bi³⁺ Ions

Emission Enhancement and Energy Transfers in YV_0.5P_0.5O₄ Nanoparticles Codoped with Eu³⁺ and Bi³⁺ Ions

Neutron diffraction reveals the existence of confined water in triangular and hexagonal channels of modified YPO4 at elevated temperatures

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

Contact Info

Product

Resources

About

Emission properties of Sm3+/Bi3+-doped YPO4 phosphors

Cited by 24 publications

References 15 publications

Emission Enhancement and Energy Transfers in YV0.5P0.5O4 Nanoparticles Codoped with Eu3+ and Bi3+ Ions

Emission Enhancement and Energy Transfers in YV0.5P0.5O4 Nanoparticles Codoped with Eu3+ and Bi3+ Ions

Neutron diffraction reveals the existence of confined water in triangular and hexagonal channels of modified YPO4 at elevated temperatures

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

Contact Info

Product

Resources

About

Emission Enhancement and Energy Transfers in YV_0.5P_0.5O₄ Nanoparticles Codoped with Eu³⁺ and Bi³⁺ Ions

Emission Enhancement and Energy Transfers in YV_0.5P_0.5O₄ Nanoparticles Codoped with Eu³⁺ and Bi³⁺ Ions