Preparation and characterization of nanosized (Y,Bi)VO4:Eu3+ and Y(V,P)O4:Eu3+ red phosphors

Nguyen, Hoang-Duy; Mho, Sun‐il; Yeo, In-Hyeong

doi:10.1016/j.jlumin.2009.04.054

Cited by 44 publications

(28 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…9 The RE vanadates are isostructural to the RE phosphates, so they have monoclinic (monazite) or tetragonal (xenotime/zircon) crystal structures, 10 which makes the development of mixed phosphovanadate phosphors with a number of advantageous luminescent properties possible. For instance, the partial replacement of PO 4 3− with the VO 4 3− species can afford improved stability and high-temperature luminescence characteristics, 11 besides allowing for the control of the emission colour, due to the higher intensity of the vanadate blue emissions when this group is diluted, and of the luminescence lifetime. Since the emission processes are not controlled by the nature of the host lattice and the activator only, the crystal morphology, size, and surface area, as well as crystallite defects, agglomeration, and homogeneity also play important roles in the decay mechanisms of the excited species.…”

Section: Introductionmentioning

confidence: 99%

Effect of the vanadium(v) concentration on the spectroscopic properties of nanosized europium-doped yttrium phosphates

2012

View full text Add to dashboard Cite

Nanosized rare earth phosphovanadate phosphors (Y(P,V)O 4 :Eu 3+ ) have been prepared by applying the organic-inorganic polymeric precursors methodology. Luminescent powders with tetragonal structure and different vanadate concentrations (0%, 1%, 5%, 10%, 20%, 50%, and 100%, with regard to the phosphate content) were then obtained for evaluation of their structural and spectroscopic properties. The solids were characterized by scanning electron microscopy, X-ray diffractometry, vibrational spectroscopy (Raman and infrared), and electronic spectroscopy (emission, excitation, luminescence lifetimes, chromaticity, quantum efficiencies, and Judd-Ofelt intensity parameters). The solids exhibited very intense 5 D 0 → 7 F J Eu 3+ transitions, and it was possible to control the luminescent characteristics, such as excitation maximum, lifetime and emission colour, through the vanadium(V) concentration. The observed luminescent properties correlated to the characteristics of the chemical environments around the Eu 3+ ions with respect to the composition of the phosphovanadates. The Eu 3+ luminescence spectroscopy results indicated that the presence of larger vanadium(V) amounts in the phosphate host lattice led to more covalent and polarizable chemical environments. So, besides allowing for control of the luminescent properties of the solids, the variation in the vanadate concentration in the obtained YPO 4 :Eu 3+ phosphors enabled the establishment of a strict correlation between the observable spectroscopic features and the chemical characteristics of the powders.

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of the vanadium(v) concentration on the spectroscopic properties of nanosized europium-doped yttrium phosphates

2012

View full text Add to dashboard Cite

show abstract

“…17) The band at 332 nm is attributed to the Bi 3+ Eu 3+ energy transfer. 18) It is also seen that the PL intensity is about two times higher in the bi-layer coating film. Thus the AR effect appears remarkably in the luminescence property of the bi-layer film, as also shown in Fig.…”

Section: +mentioning

confidence: 87%

Creation of multiple optical functions based on structural control of inorganic luminescent materials

Fujihara

2015

J. Ceram. Soc. Japan

View full text Add to dashboard Cite

Creation and introduction of multiple functions in inorganic luminescent materials can open new possibilities for applications other than conventional lighting and display technologies. This article reviews recent developments in the synthesis of multifunctional luminescent materials through chemical processing of ceramics. Particular emphasis is put on the structural control of materials to generate some interesting optical and chemical properties. The procedures and results are described for luminescent pigments consisting of coreshell-structured particles, antireflective luminescent coatings based on a bi-layer structure or a pseudo moth-eye structure, and redox-sensitive smart phosphors in the form of nanopowders and thin films.

show abstract

“…[8][9][10][11][12][13][14] Despite there have been numerous studies of the synthesis of MVO 4 :Eu nanophosphors, most attention has focused on the synthesis of powder-type MVO 4 :Eu phosphors. Monodispersed nanophosphors prepared by soft reactions can easily agglomerate in organic solvents.…”

Section: -7mentioning

confidence: 99%

Preparation and Photoluminescence of GdVO₄:Eu Nanophosphors for Flexible and Transparent Displays

Kim¹,

Huh²

2011

Bulletin of the Korean Chemical Society

View full text Add to dashboard Cite

Europium ion doped metal orthovanadate (MVO 4 :Eu, M = Y, Gd, La) has been widely used as commercial red-emitting phosphors in cathode ray tubes (CRTs), and fluorescent lamps, 1,2 with photoluminescence quantum yields of up to 95%.3,4 Commercial micron-sized MVO 4 :Eu phosphors are generally prepared by high-temperature solid-state reactions. However, these micron-sized phosphors cannot be used in flexible and transparent displays due to their high scattering. Because nano-sized materials do not show any scattering in the visible region, inorganic nanophosphors have received much attention for their applicability in flexible and transparent display devices. 5-7MVO 4 :Eu nanophosphors have been prepared by soft reactions, such as hydrothermal, solvothermal, sonochemical, microemulsion, and polymer-assisted methods.8-14 Despite there have been numerous studies of the synthesis of MVO 4 :Eu nanophosphors, most attention has focused on the synthesis of powder-type MVO 4 :Eu phosphors. Monodispersed nanophosphors prepared by soft reactions can easily agglomerate in organic solvents. Transparent suspensions of nanophosphors without an agglomeration in organic solvents are needed for these phosphors to be used in flexible and transparent displays. However, there are few reports of preparing transparent suspensions of nanophosphors. Transparent suspensions of small amounts of YVO 4 :Eu nanophosphors in hexane have been prepared using surfactant-assisted hydrothermal reactions in a waterhexane bilayer system.15 In this system, most of the YVO 4 :Eu nanophosphors aggregated in the water phase that is not adequate for the flexible and transparent displays. New methods for the large-scale synthesis of nanophosphors are required that can prepare phosphors in single organic solvent phase. This work reports the first simple method of preparing transparent suspensions of GdVO 4 :Eu nanophosphors in toluene. The optimal conditions for the phosphors' bright emission were also examined.GdVO 4 :Eu nanophosphors were prepared by solvothermal reactions from Gd-oleate, Eu-oleate, and tetraoctylammonium-VO 4 complexes in toluene in the presence of oleic acid and oleylamine. Gd-oleate and Eu-oleate were obtained by transferring aqueous Gd(NO 3 ) 3 and Eu(NO 3 ) 3 to the toluene phase by adding sodium oleate in toluene. Tetraoctylammonium-VO 4 was obtained by transferring NH 4 VO 3 in water with NH 4 OH to toluene by introducing tetraoctylammonium bromide in toluene. Typical powder X-ray diffraction (XRD) patterns of GdVO 4 :Eu phosphors prepared at 80°C (Figure 1) indicated a structure matching that of tetragonal GdVO 4 (JCPDS 17-0260, a = 0.7212 nm, c = 0.6348 nm). The ionic radius of Eu 3+ (0.0950 nm) is slightly larger than that of Gd 3+ (0.0938 nm), Eu 3+ ions are allowed to its facile occupation of Gd 3+ sites in the host GdVO 4 structure. 16 The broad XRD peak also indicates that the GdVO 4 :Eu was present as nanoparticles. The XRD patterns confirm that the GdVO 4 :Eu phosphor was synthesized without impurities. High-resolution tr...

show abstract

Preparation and characterization of nanosized (Y,Bi)VO4:Eu3+ and Y(V,P)O4:Eu3+ red phosphors

Cited by 44 publications

References 24 publications

Effect of the vanadium(v) concentration on the spectroscopic properties of nanosized europium-doped yttrium phosphates

Effect of the vanadium(v) concentration on the spectroscopic properties of nanosized europium-doped yttrium phosphates

Creation of multiple optical functions based on structural control of inorganic luminescent materials

Preparation and Photoluminescence of GdVO₄:Eu Nanophosphors for Flexible and Transparent Displays

Contact Info

Product

Resources

About

Preparation and characterization of nanosized (Y,Bi)VO4:Eu3+ and Y(V,P)O4:Eu3+ red phosphors

Cited by 44 publications

References 24 publications

Effect of the vanadium(v) concentration on the spectroscopic properties of nanosized europium-doped yttrium phosphates

Effect of the vanadium(v) concentration on the spectroscopic properties of nanosized europium-doped yttrium phosphates

Creation of multiple optical functions based on structural control of inorganic luminescent materials

Preparation and Photoluminescence of GdVO4:Eu Nanophosphors for Flexible and Transparent Displays

Contact Info

Product

Resources

About

Preparation and Photoluminescence of GdVO₄:Eu Nanophosphors for Flexible and Transparent Displays