Preparation, microstructure and crystal structure studies of Li+ co-doped YPO4:Eu3+

Parchur, Abdul K.; Ningthoujam, R. S.

doi:10.1039/c2ra20763j

Cited by 58 publications

(43 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[15][16][17] The YPO 4 and CaMoO 4 hosts have relatively high multiphonon relaxation but they can be prepared at a very low temperature. 17,18 In SrF 2 crystals, lanthanide ions form clusters in SrF 2 as a result of the need for charge compensation when divalent Sr 2+ is substituted by trivalent Pr 3+ . 7 The clustering might enhance the probability that Pr 3+ -ion is in close proximity to the Eu 2+ neighbours, which is very likely to improve the energy transfer between the two ions.…”

Section: +mentioning

confidence: 99%

Enhanced Pr3+ photoluminescence by energy transfer in SrF2 : Eu2+, Pr3+ phosphor

et al. 2016

View full text Add to dashboard Cite

Efficient energy transfer was demonstrated in the SrF2 : Eu2+, Pr3+ phosphor synthesized by the co-precipitation method. Results obtained with X-ray diffraction (XRD), scanning electron microscopy (SEM), x-ray spectroscopy (XPS), photoluminescence (PL) and decay curves proposed the UV-Vis energy transfer process. The energy transfer process between the Eu2+ and Pr3+ ions in SrF2 was investigated to evaluate the potential of the Eu2+ ion as a sensitizer for the Pr3+ ion. The results proposed that Eu2+ could be a good sensitizer for absorbing the UV photons and efficiently enhancing the Pr3+ emission intensity. The energy transfer process was effective until concentration quenching for the Pr3+ ions occurred. The concentration quenching was attributed to cross-relaxation between the Pr3+ ions.

show abstract

Section: +mentioning

confidence: 99%

Enhanced Pr3+ photoluminescence by energy transfer in SrF2 : Eu2+, Pr3+ phosphor

et al. 2016

View full text Add to dashboard Cite

show abstract

“…19,20 In addition, rare earth phosphate nanomaterials have potential applications in the LCD displays, plasma display panels (PDPS), eld emission displays, new generation uo-rescent lamps, and so on. [21][22][23][24] Many preparation methods have been used to fabricate nanostructured rare earth phosphates such as nanowires, nanotubes, nanoplates, and nanorods to improve the luminescence emission intensity. [25][26][27][28] In this paper, we report the synthesis of cluster-like, ower-like and spherical-like EuPO 4 nano/microstructures materials by a simple hydrothermal process, in combination with the coprecipitation method to controllably synthesize the core-shell SiO 2 @EuPO 4 nanostructures.…”

Section: Introductionmentioning

confidence: 99%

Controlled synthesis of EuPO₄ nano/microstructures and core–shell SiO₂@EuPO₄ nanostructures with improved photoluminescence

Yang

Zhao

et al. 2017

RSC Adv.

View full text Add to dashboard Cite

Cluster-like, flower-like and sphere-like EuPO 4 nano/microstructures and uniform core-shell SiO 2 @EuPO 4 nanostructures have been controllably synthesized by the hydrothermal route and co-precipitation method, respectively. The as-synthesized products are characterized by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS) and infrared spectroscopy (IR). The possible formation mechanism of the as-synthesized products is proposed. The photoluminescence properties demonstrate that the locations of the strongest peaks of nano/microstructured EuPO 4 and core-shell

show abstract

“…The spacing between the interplanner spacing (d hkl ) has a relationship with the Bragg's angle (θ) at constant X-ray wavelength (λ). 23 There is an increase in ratio of tetragonal to monoclinic phases with Li + codoping as compared to that of LaVO 4 :Eu. The crystallite size is calculated from the highest intensity peak in tetragonal phase.…”

Section: Resultsmentioning

confidence: 95%

Is Higher Ratio of Monoclinic to Tetragonal in LaVO₄ a Better Luminescence Host? Redispersion and Polymer Film Formation

Okram

Yaiphaba²,

Ningthoujam

et al. 2014

Inorg. Chem.

View full text Add to dashboard Cite

Crystalline LaVO4:Eu(3+) nanophosphors (NPs) codoped with metal ions (M(n+) = Li(+), Sr(2+), and Bi(3+)) are prepared in ethylene glycol (EG) medium at temperature ∼140 °C in 3 h. A mixture of monoclinic and tetragonal phases is observed. The ratio of tetragonal to monoclinic phases increases with increase of Li(+) and Sr(2+) concentration, but this is opposite in case of Bi(3+) concentration. Lattice expansion occurs in the case of Li(+) and Sr(2+) codoping. Li(+) ions occupy the interstitial sites instead of La(3+) sites. Lattice contraction occurs in case of Bi(3+) codoping indicating substitution of La(3+) sites. Luminescence intensity is improved by codoping of M(n+) irrespective of crystal structure. Charges of Li(+) and Sr(2+) are different from that of La(3+) (host lattice), whereas the charge of Bi(3+) is same as that of La(3+). One interesting observation is in magnetic dipole transition that the intensity of the peak at 594 nm is more than that at 587 nm in the case of charge imbalance, whereas the reverse occurs in the case of charge balance. LaVO4:Eu(3+) nanophosphors prepared in water medium have more luminescence intensity when compared to those prepared in ethylene glycol, and this is related to variation of ratio of tetragonal to monoclinic phases. The luminescence intensity is also enhanced as annealing temperature increases from 600 to 800 °C due to the improved crystallinity. Lifetime data are analyzed on the basis of exponential and nonexponential decay equations. Samples are dispersible in polar medium due to capping of particles by EG. Polymer films are prepared by dispersion of NPs in poly(vinyl alcohol), and extra borax is added in order to make cross-link between polymer molecules. Samples of NPs in the forms of powder, dispersion in liquid medium, and film show the red emission.

show abstract

Preparation, microstructure and crystal structure studies of Li+ co-doped YPO4:Eu3+

Cited by 58 publications

References 20 publications

Enhanced Pr3+ photoluminescence by energy transfer in SrF2 : Eu2+, Pr3+ phosphor

Enhanced Pr3+ photoluminescence by energy transfer in SrF2 : Eu2+, Pr3+ phosphor

Controlled synthesis of EuPO₄ nano/microstructures and core–shell SiO₂@EuPO₄ nanostructures with improved photoluminescence

Is Higher Ratio of Monoclinic to Tetragonal in LaVO₄ a Better Luminescence Host? Redispersion and Polymer Film Formation

Contact Info

Product

Resources

About

Preparation, microstructure and crystal structure studies of Li+ co-doped YPO4:Eu3+

Cited by 58 publications

References 20 publications

Enhanced Pr3+ photoluminescence by energy transfer in SrF2 : Eu2+, Pr3+ phosphor

Enhanced Pr3+ photoluminescence by energy transfer in SrF2 : Eu2+, Pr3+ phosphor

Controlled synthesis of EuPO4 nano/microstructures and core–shell SiO2@EuPO4 nanostructures with improved photoluminescence

Is Higher Ratio of Monoclinic to Tetragonal in LaVO4 a Better Luminescence Host? Redispersion and Polymer Film Formation

Contact Info

Product

Resources

About

Controlled synthesis of EuPO₄ nano/microstructures and core–shell SiO₂@EuPO₄ nanostructures with improved photoluminescence

Is Higher Ratio of Monoclinic to Tetragonal in LaVO₄ a Better Luminescence Host? Redispersion and Polymer Film Formation