Abstract: A tungstate-based scintillating material and a method for using a tungstate-based scintillating material is provided. In addition, a radiation detector and an imaging device incorporating a tungstate-based scintillating material are provided.

Abstract: The invention relates to a polymer comprising structural unit of formula II: wherein R1, R2, R3, R4, R5, R6 and R7 are independently at each occurrence a C1-C20 aliphatic radical, a C3-C20 aromatic radical, or a C3-C20 cycloaliphatic radical; a, b, d, e and f are independently at each occurrence 0, or an integer ranging from 1 to 4; c and g are independently at each occurrence 0, or an integer ranging from 1 to 3. In another aspect, the invention relates to monomers for preparing the polymers. In yet another aspect, the invention relates to an optical electronic device comprising a polymer comprising structural unit of formula II.

Abstract: Provided are a transparent phosphor made without a resin or a low-melting-point glass that easily deteriorates and having a fine color rendering property, and a method of manufacturing the same. The transparent phosphor which provides white fluorescent light upon incidence of excitation light is characterized in that it is composed of two or more kinds of fluorescent phases, the fluorescent phases have a main phase made of an amorphous phase composed mainly of A (A being any one or more elements of Al, Ga, Ge, W, P, V, Zn, Si, B, Mg, Ca, Ba, Sr, and Sc), Ln (Ln being any one or more elements of Y, Gd, La, Sm, Dy, Ho, Er, Yb, and Lu), O, and R as an activator (R being any one or more elements of Eu, Tb, Ce, Sm, Tm, Pr, Nd, Dy, Ho, Er, Yb, Mn, Ti, Fe, Cr, and Pb that is/are other than an element or elements selected as Ln), and the fluorescent phases are different at least in the kind of R or the average valence of R.

Abstract: The invention relates to inorganic phosphors, obtainable by wet milling and having a particle size distribution of D90<5 ?m, to a method for producing said pigments and the use thereof. The use of wet milled inorganic phosphor particles wherein 90 percent of the particles have a diameter of equal to or less than 5 ?m, especially equal to or less than 3 ?m, very especially equal to or less than 1 ?m can provide for an improved fluorescence in contrast to the general believe.

Abstract: A red-light-emitting fluorescent material, suitable for being excited by a first light to emit red light, is provided. The red-light-emitting fluorescent material is characterized in the chemical formula (1): A3B2C3(MO4)8:Eu3+??(1) wherein, A represents Li, Na, K, Rb, Cs or Ag; B represents Mg, Ca, Sr or Ba; C represents Y, Gd or La; M represents Mo, W or combination of Mo and W (MoxW(1-x)). The red-light-emitting fluorescent material has high luminance and good color purity. In addition, since the composition of the red-light-emitting fluorescent material is oxide, the red-light-emitting fluorescent material has advantages of good chemical stability and long lifetime.

Abstract: The blue phosphor of the present invention is represented by the general formula aBaO.bSrO.(1?a?b)EuO.cMgO.dAlO3/2.eWO3, where 0.70?a?0.95, 0?b?0.15, 0.95?c?1.15, 9.00?d?11.00, 0.001?e?0.200, and a+b?0.97 are satisfied. In the blue phosphor of the present invention, two peaks whose tops are located in a range of diffraction angle 2?=13.0 to 13.6 degrees and one peak whose top is located in a range of diffraction angle 2?=14.6 to 14.8 degrees are present in an X-ray diffraction pattern obtained by measurement on the blue phosphor using an X-ray with a wavelength of 0.774 ?.

Abstract: The blue phosphor of the present invention includes ZrO2 and a metal aluminate that is represented by the general formula aBaO.bSrO.(1?a?b)EuO.cMgO.dAlO3/2.eWO3, where 0.70?a?0.95, 0?b?0.15, 0.95?c?1.15, 9.00?d?11.00, 0.001?e?0.200, and a+b?0.97 are satisfied. This blue phosphor has a ZrO2 content of 0.01 to 1.00% by weight. In the blue phosphor of the present invention, two peaks whose tops are located in a range of diffraction angle 2?=13.0 to 13.6 degrees are present in an X-ray diffraction pattern obtained by measurement on the blue phosphor using an X-ray with a wavelength of 0.774 ?.

Abstract: The invention relates to a composition for a coding forming at least part of a coding system having a luminescent basic substance and at least one luminescent additive, the composition of the coding being formed by the presence or absence of a luminescent additive and/or the type of additives and/or the number of additives.

Abstract: Nanoparticles comprising tungsten, methods of manufacturing nanoparticles comprising tungsten, and applications of nanoparticles comprising tungsten, such as electronics, optical devices, photonics, reagents for fine chemical synthesis, pigments, and catalysts are provided.

Abstract: The invention relates to novel line-emitter phosphors, to a process for the preparation thereof, and to white-emitting illumination units comprising the line-emitter phosphors according to the invention.

Abstract: A red phosphor is represented by the following Formula 1. (Y1-xMx)1-z(VyM?1-y)O4:Euz??[Formula 1] wherein, M is an element selected from the group consisting of Gd, In, La, Sc, Lu, and combinations thereof, M? is an element selected from the group consisting of P, Nb, W, and combinations thereof, 0.00?x?1.00, 0.40<y?1.00, and 0.01?z?0.20. A display device includes the red phosphor.

Abstract: A wavelength converting material including a wavelength converting activator and a scatter is provided. The wavelength converting activator is suitable for being activated by a light with a wavelength ?1, so as to emit a light with a wavelength ?2. The scatter is disposed on the wavelength converting activator. The scatter is suitable for scattering a first light and a second light irradiated to a surface thereof. As a result of that the scatters on the wavelength converting activators increases the gap of two wavelength converting activators adjacent to each other, the wavelength converting activators could be sufficiently activated for emitting a light with wavelength ?2 while the wavelength converting materials are irradiated by the light with ?1. Therefore, the brightness of a light emitting diode with the wavelength converting material is enhanced.

Abstract: A red light-emitting phosphor capable of emitting red light upon excitation with light having a wavelength of 350 to 420 nm, represented by the following compositional formula (1): A(1-x)Eu(1-x-y)LnyD2xM2O8??(1) wherein A is at least one element selected from the group consisting of Li, Na, K, Rb and Cs, Ln is at least one element selected from rare earth elements including Y but excluding Eu, D is at least one element selected from the group consisting of Mg, Ca, Sr and Ba, M is at least one element selected from Mo and W, x is a positive number satisfying 0<x?0.7, and y is 0 or a positive number satisfying 0<y?0.5, and x+y is a number satisfying 0<x+y?0.7.

Abstract: This invention provides novel cadmium tungstate scintillator materials that show improved radiation hardness. In particular, it was discovered that doping of cadmium tungstate (CdWO4) with trivalent metal ions or monovalent metal ions is particularly effective in improving radiation hardness of the scintillator material.

Abstract: An improved nanophosphor composite comprises surface modified nanophosphor particles in a solid matrix. The nanophosphor particle surface is modified with an organic ligand, or by covalently bonding a polymeric or polymeric precursor material. The surface modified nanophosphor particle is essentially charge neutral, thereby preventing agglomeration of the nanophosphor particles during formation of the composite material. The improved nanophosphor composite may be used in any conventional scintillator application, including in a radiation detector.

Abstract: To provide a phosphor having an emission spectrum with a broad peak in a range from green color to yellow color, having a broad and flat excitation band capable of using lights of broad range from near ultraviolet/ultraviolet to blue lights as excitation lights, and having excellent emission efficiency and luminance. The problem is solved by providing the phosphor expressed by a general composition formula MmAaBbOoNn:Z (where element M is one or more kinds of elements having bivalent valency, element A is one or more kinds of elements having tervalent valency, element B is one or more kinds of elements having tetravalent valency, O is oxygen, N is nitrogen, and element Z is one or more kinds of elements acting as the activator.), satisfying 4.0<(a+b)/m<7.0, a/m=0.5, b/a>2.5, n>o, n=2/3m+a+4/3b?2/3o, and having an emission spectrum with a peak wavelength of 500 nm to 650 nm when excited by light in a wavelength range from 300 nm to 500 nm.

Abstract: Materials suitable for use in highly energy-efficient production of white light through photo-luminescence, such as in light emitting devices, are generally provided. A composition comprising a compound having the formula: Sr3-vAvMO4-xF1-y wherein A is Ca, Ba, or a mixture thereof; M is Al, Ga, In, W, Mo, or a mixture thereof; 0?v?1; 0<x<0.4; and 0<y<0.2 is generally described. A composition comprising a compound having the formula: Sr3-vAvIn1-mMmO4-xF where A is Ca, Ba, or a mixture thereof; M is Al, Ga, W, Mo, or a mixture thereof; 0?v?1; 0?m<1; and 0<x<4 is also provided. Nitrogen can be substituted for a portion of the oxygen atoms in these structures. Methods introducing defects into a compound by removing a portion of oxygen and fluorine atoms from the compound are also provided.

Abstract: There are provided a composite oxide of a triclinic crystal system comprising zinc and tungsten, and a production method thereof. Further, there is provided a light-emitting material comprising the composite oxide of triclinic crystal system comprising zinc and tungsten.

Abstract: It is an object to provide a novel phosphor which can be manufactured without using a defect formation step which is difficult to control, and a manufacturing method thereof. The phosphor has a structure including a phosphor host material and an emission excitation material which is dispersed in a marbled pattern in the phosphor host material while being in contact with it. The emission excitation material is selected from metal oxide, a semiconductor formed of an element belonging to Group 2B (Group 12) of the periodic table and an element belonging to Group 6B (Group 16) of the periodic table, or an element formed of an element belonging to Group 3B (Group 13) of the periodic table and an element belonging to Group 5B (Group 15) of the periodic table. The phosphor host material and the emission excitation material are mixed and baked with pressure to be joined.

Abstract: To provide a phosphor having a broad emission spectrum in a range of blue color (in a peak wavelength range from 400 nm to 500 nm), having a broad flat excitation band in a near ultraviolet/ultraviolet range, and having excellent emission efficiency and emission intensity/luminance. The phosphor is given as a general composition formula expressed by MmAaBbOoNn:Z, (where element M is the element having bivalent valency, element A is the element having tervalent valency, element B is the element having tetravalent valency, O is oxygen, N is nitrogen, and element Z is more than one kind of element acting as an activator), satisfying 5.0<(a+b)/m<9.0, 0?a/m?2.0, 0?o?n, n=2/3m+a+4/3b?2/3o, and has an emission spectrum with a maximum peak in the wavelength range from 400 nm to 500 nm under an excitation of the light in a wavelength range from 250 nm to 430 nm.

Abstract: The invention relates to a transparent, luminescent plastic glass containing luminescent particles and to a method for producing the same. The glass hardly differs or differs only slightly in terms of transparency from pure plastic glass. In addition, said glass is easy to produce.

Abstract: The present invention aims at realizing a PDP and a mercury-free fluorescent lamp feasible to maintain excellent luminescent characteristics over long periods by suppressing time-lapse changes in luminescent characteristics of a phosphor that is excited by vacuum ultraviolet light to thereby emit light. To accomplish this object, the oxide phosphor of the invention comprises individual particles, each of which has a region at and near the surface thereof modified, and the elemental composition of the surface region is in a more oxidized state than that of the internal region of the particles. Alternatively, the surface region has more halogen or chalcogen in the elemental composition. In the phosphor treatment method of the invention, the surface region of individual phosphor particles is selectively modified by (i) forming a highly reactive gas atmosphere by exciting gas which contains reactive gas, and (ii) exposing the phosphor to the gas atmosphere.

Abstract: A phosphor blend for an electroluminescent lamp is described that comprises a green-emitting electroluminescent phosphor and a red-emitting photoluminescent phosphor, the blend exhibiting an x color coordinate from 0.220 to 0.350 and a y color coordinate from 0.450 to 0.475 when stimulated by an electric field.

Abstract: The present invention aims at providing a blue-aimed phosphor powder which is more excellent in emission characteristic than the conventional rare-earth activated sialon phosphors and which is more excellent in durability than the conventional oxide phosphors. The solving means resides in: firing a starting material mixture in a nitrogen atmosphere at a temperature range between 1,500° C. inclusive and 2,200° C. inclusive, wherein the starting material mixture is a mixture of metallic compounds, and is capable of constituting a composition comprising M, A, Si, Al, O, and N (M is one kind or two or more kinds of element(s) selected from Mn, Ce, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm, and Yb; and A is one kind or two or more kinds of element(s) selected from C, Si, Ge, Sn, B, Ga, In, Mg, Ca, Sr, Ba, Sc, Y, La, Gd, Lu, Ti, Zr, Hf, Ta, and W) by firing; to obtain a phosphor which emits fluorescence having a peak at a wavelength within a range of 400 nm to 700 nm, by irradiation of an excitation source.

Abstract: A thermo-optically functional composition is disclosed. The composition includes components A, B, C, and D, and has a thermal emission or reflection spectrum that is altered with respect to a thermal emission or reflection spectrum of a composition ABn and a thermal emission or reflection spectrum of a composition CDp, where at least A is different from C or B is different from D.

Abstract: Provided are a phosphor paste composition, a flat display device including the same, and a method of manufacturing the flat display device. The phosphor paste composition contains a phosphor with at least a heat-resistant material selected from a Group II atom-containing material, a Group III atom-containing material, and a Group IV atom-containing material, a binder, and an organic solvent. By using the phosphor paste composition, the deterioration of the phosphor can be prevented during a heat treating process. The flat display device includes a phosphor layer containing the phosphor coated with the heat-resistant material such that lifetime of the flat display device is increased and a permanent residual image phenomenon, the adsorption of water by the phosphor, and the like can be prevented.

Abstract: An LED package structure including a carrier, an LED chip, an encapsulant and a PL material is provided, wherein the LED chip is disposed on the carrier for emitting light. The encapsulant encapsulates the LED chip. The PL material is distributed in the encapsulant. The PL material is suitable for being excited by the light emitted from the LED chip and scattering the light. Moreover, the present invention provides a novel PL material with a molecular formula of WmMon(Y,Ce,Tb,Gd,Sb)3+t+u(Al,Ga,Tl,In,B)5+u+2v(O,S,Se)12+2t+3u+3v+3m+3n:Ce3+,Tb3+, wherein 0<t<5 and 0<m, n, u, v<15.

Abstract: This invention provides novel cadmium tungstate scintillator materials that show improved radiation hardness. In particular, it was discovered that doping of cadmium tungstate (CdWO4) with trivalent metal ions or monovalent metal ions is particularly effective in improving radiation hardness of the scintillator material.

Abstract: An improved nanophosphor scintillator liquid comprises nanophosphor particles in a liquid matrix. The nanophosphor particles are optionally surface modified with an organic ligand. The surface modified nanophosphor particle is essentially surface charge neutral, thereby preventing agglomeration of the nanophosphor particles during dispersion in a liquid scintillator matrix. The improved nanophosphor scintillator liquid may be used in any conventional liquid scintillator application, including in a radiation detector.

Abstract: The current invention provides a persistent phosphor blend, along with techniques for making and using the blend. The persistent phosphor blend is made of at least one persistent phosphor combined with at least one other phosphor, where the excitation spectra of the one or more other phosphors overlap the emission spectra of the one or more persistent phosphors. The choice of the phosphors used allows the decay time and emission colors to be tuned for the specific application. In another embodiment, the invention provides a method for making persistent phosphor blends with tunable colors. In yet another embodiment, applications for such a persistent phosphor blend are provided.

Abstract: The current invention provides a persistent phosphor blend, along with techniques for making and using the blend. The persistent phosphor blend consists of at least one persistent phosphor combined with at least one other phosphor, where the excitation spectra of the one or more other phosphors overlap the emission spectra of the one or more persistent phosphors. The choice of the phosphors used allows the decay time and emission colors to be tuned for the specific application. In another embodiment, the invention provides a method for making persistent phosphor blends with tunable colors. In yet another embodiment, applications for such a persistent phosphor blend are provided.

Abstract: Disclosed herein is multilayered sheet comprising a core layer comprising a thermoplastic polymer and an IR absorbing additive; wherein the IR absorbing additive is a metal oxide; and a first cap layer comprising a thermoplastic polymer and an electromagnetic radiation absorbing additive; wherein a surface of the first cap layer is disposed upon and in intimate contact with a surface of the core layer. Disclosed herein too is a method for manufacturing a multilayered sheet comprising melt blending a composition comprising a thermoplastic polymer and an IR absorbing additive to produce a core layer; melt blending a composition comprising a thermoplastic polymer and an ultraviolet radiation absorber to produce a first cap layer; combining the core layer with the first cap layer in such a manner that the cap layer is disposed upon and in intimate contact with a surface of the core layer.

Abstract: It is an object of the present invention to control damage of a phosphor caused by an etching solution. Disclosed is a method of manufacturing a phosphor having the steps of: (a) crushing phosphor particles via a crushing treatment process, and (b) surface-treating phosphor particles dispersed in a solvent by adding an etching solution via a surface treatment process, wherein an adding speed of the etching solution is in a range of 1.2×10?16-7.0×10?15 mol/min. per 1 m2 of specific surface area of the phosphor particles.

Abstract: The present invention relates to a novel process for the production of spherical binary and multinary mixed oxide powders in a hot-wall reactor. Through the use of aqueous or organic salt solutions or suspensions having a limited salt or solid concentration in combination with additives in the form of surfactants and/or of inorganic salts which have an exothermic decomposition reaction, a compact spherical particle morphology can be obtained, where the average particle size is in the range from 5 nm to <10 ?m.

Abstract: A mixed melt, which contains urea and/or a urea derivative and contains a metal compound, is prepared. The mixed melt is solidified, by heating, whereby the urea and/or urea derivative is decomposed, a precursor being thereby prepared. The thus prepared precursor is ground, and then the thus ground precursor is fired. The metal of the metal compound may be at least one kind of a metal selected from the group consisting of Al, B, Ba, Be, Bi, Ca, Cd, Cs, Ga, Ge, Hf, In, K, Li, Mg, Mo, Na, Nb, P, Rb, Si, Sn, Sr, Ta, Ti, V, W, Zr, and rare earth metals. A finely powdered phosphor free from inclusion of impurities and having uniform particle size is thus produced at a low cost and efficiently.

Abstract: The present invention provides a phosphor blend for wavelength conversion and a white light emitting device using the phosphor blend. Further disclosed is a white light emitting phosphor blend comprising 0.5˜18 wt % of A5(PO4)3Cl:Eu2+ (where A is at least one element selected from Sr, Ca, Ba and Mg), 0.7˜14 wt of D2SiO4:Eu (where D is at least one element selected from Ba, Sr and Ca), and 68˜98.5 wt % of G5EuS(WO4)2.5+1.5S:Sm (where G is at least one element selected from Li, Na and K; and s is a number between 1 and 5), based on the total weight of the phosphor blend.

Abstract: Disclosed are phosphor compositions having the formula (RE1-yCey)Mg2-xLixSi3-xPxO12, where RE is at least one of Sc, Lu, Gd, Y, and Tb, 0.0001<x<0.1 and 0.001<y<0.1. When combined with at least one additional phosphor and subjected to radiation from a blue or UV LED, these phosphors can provide white light sources with good color quality having high CRI over a large color temperature range. Also disclosed are blends of the above phosphors and additional phosphors.

Abstract: A red light-emitting phosphor capable of emitting red light upon excitation with light having a wavelength of 350 to 420 nm, represented by the following compositional formula (1): A(1-x)Eu(1-x-y)LnyD2xM2O8 ??(1) wherein A is at least one element selected from the group consisting of Li, Na, K, Rb and Cs, Ln is at least one element selected from rare earth elements including Y but excluding Eu, D is at least one element selected from the group consisting of Mg, Ca, Sr and Ba, M is at least one element selected from Mo and W, x is a positive number satisfying 0<x?0.7, and y is 0 or a positive number satisfying 0<y?0.5, and x+y is a number satisfying 0<x+y?0.7.

Abstract: Some embodiments of the present invention are directed toward nanocrystalline oxide-based phosphor materials, and methods for making same. Typically, such methods comprise a steric entrapment route for converting precursors into such phosphor material. In some embodiments, the nanocrystalline oxide-based phosphor materials are quantum splitting phosphors. In some or other embodiments, such nanocrystalline oxide based phosphor materials provide reduced scattering, leading to greater efficiency, when used in lighting applications.

Abstract: A light-emitting material includes a matrix section 12 and light-emitting sections 11 dispersed and buried in the matrix section. The matrix section 12 comprises a first material and the light-emitting sections comprise a second material showing a eutectic relationship with the first material.

Abstract: A phosphor having a magnetoplumbite-type crystal structure and comprising at least one element selected from B, Si, P, Ge, Ti, V, Ni, Ta, Nb, Mo, W, Yb, Tm and Bi.

Abstract: This invention provides novel cadmium tungstate scintillator materials that show improved radiation hardness. In particular, it was discovered that doping of cadmium tungstate (CdWO4) with trivalent metal ions or monovalent metal ions is particularly effective in improving radiation hardness of the scintillator material.

Abstract: Collections of phosphor particles have achieved improved performance based on improved material properties, such as crystallinity. Display devices can be formed with these improved submicron phosphor particles. Improved processing methods contribute to the improved phosphor particles, which can have high crystallinity and a high degree of particle size uniformity. Dispersions and composites can be effectively formed from the powders of the submicron particle collections.

Abstract: An objective is to provide a core/shell type particle phosphor exhibiting an optimal excitation wavelength for fluorescence observation and excellent emission luminance of PL, together with excellent durability, to which particles are produced so as to be suitable for the field of bio-nanotechnology. Disclosed is a core/shell type particle phosphor comprising a core particle phosphor and coated thereon, a shell made of a metal compound having a different composition from a composition constituting the core particle phosphor, wherein the core particle phosphor is a particle phosphor prepared by baking a precursor synthesized via a reactive crystallization method, satisfying a PL (photoluminescence) intensity ratio A of the core particle phosphor to the core/shell type particle phosphor, {PL intensity(core)/PL intensity(core/shell)}; 0.001?A?0.1, and a core/shell type particle diameter of at most 0.1 ?m.

Abstract: A phosphor with high efficiency having an excitation band corresponding to light of the ultraviolet-visible (300 to 550 nm) wavelength region emitted from a light emitting portion which emits blue or ultraviolet light is provided. A nitride of Ca, a nitride of Al, a nitride Si, and an oxide of Eu are prepared, and respective raw materials are weighed so that a mol ratio of respective elements becomes Ca:Al:Si:Eu=0.985:3:1:0.015, mixed under a nitrogen atmosphere, and thereafter fired at 1500° C. in a nitrogen atmosphere to thereby produce a phosphor having a composition formula Ca0.985SiAlN3:Eu0.015.

Abstract: Phosphor compositions having the formula (Y1-x-y-zTbxGdyCez)3(M1M2)t(Al1-r-sGarIns)A-2tO12+D, where M1 is Mg or Zn, M2 is Si or Ge, 0<x+y<1, 0.01<z<0.1, 0.1<t<1.5, 0<r, s<0.5, 4.5<A<5.0, and ?1<D<1. Also disclosed are light emitting devices including a light source and at least one phosphor having the above formula. Such phosphors exhibit a deeper red emission when compared to conventional TAG phosphors, allowing the production of white light sources having improved properties.

Abstract: Methods for the preparation of inorganic nanoparticles capable of fluorescence, wherein the nanoparticles consist of a host material that comprises at least one dopant. The synthesis of the invention in organic solvents allows to gain a considerably higher yield compared to the prior art synthesis in water. All kinds of objects can advantageously be marked and reliably authenticated by using an automated method on the basis of a characteristic emission. Further, the size distribution of the prepared nanoparticles is nartower which renders a subsequent size-selected separation process superfluous.

Abstract: As a green light emitting phosphor capable of emission upon excitation with light having a wavelength of 350 to 500 nm, characterized in containing Tb3+ ions as emission ions in high concentrations without causing concentration quenching, the present invention provides a green light emitting phosphor capable of emission upon excitation with light having a wavelength of 350 to 500 nm, characterized by having a composition represented by the compositional formula (1): ATbxLn(1-x)M2O8??(1) wherein A is at least one element selected from the group consisting of Li, Na, K, and Ag, Ln is at least one element selected from rare earth elements including Y and excluding Tb, M is at least one element selected from the group consisting of Mo and W, and x is a positive number satisfying 0.4?x?1, and a light emitting device incorporated with the green light emitting phosphor.

Abstract: Phosphor and a plasma display device are provided whose deterioration in brightness of phosphors and a degree of change in chromaticity are alleviated and whose discharge characteristics are improved and that has excellent initial characteristics. Phosphor of the present invention is an alkaline-earth metal aluminate phosphor containing an element M (where M denotes at least one type of element selected from the group consisting of Nb, Ta, W and B). In this phosphor, a concentration of M in the vicinity of a surface of the phosphor particles is higher than the average concentration of M in the phosphor particles as a whole. A plasma display device according to the present invention includes a plasma display panel in which a plurality of discharge cells in one color or in a plurality of colors are arranged and phosphor layers are arranged so as to correspond to the discharge cells in colors and in which light is emitted by exciting the phosphor layers with ultraviolet rays.

Abstract: Electroluminescent phosphor powders and a method for making phosphor powders. The phosphor powders have a small particle size, narrow particle size distribution and are substantially spherical. The method of the invention advantageously permits the economic production of such powders. The invention also relates to improved devices, such as electroluminescent display devices, incorporating the phosphor powders.