A luminophore may have the general molecular formula Na.sub.vK.sub.xRb.sub.yLi.sub.zCs.sub.w (Li.sub.3SiO.sub.4)4:E, where: v+x+y+z+w = 4; 0 < v < 4; 0 < x < 4; 0 < y < 4; 0 < z < 4; 0 < w < 4; and E = Eu, Ce, Yb, Mn, or combinations thereof.

The present invention is a fluorescent material characterized by being represented by a composition of the following formula (1) and having a crystal lattice distortion obtained from a Williamson-Hall plot by X-ray diffraction within the range of 0.0005 to 0.0020. (Sr,Ca,M).sub.3-xMgSi.sub.2O.sub.8:Eu.sub.x formula (1) wherein M is at least one rare earth metal elements selected from the group consisting of Sc, Y, Gd, Tb and La, and 0.01≦x≦0.10. Also, the present invention is a light-emitting device including the fluorescent material, and a light source that emits light by irradiating the fluorescent material with excitation light. Furthermore, the present invention is a method for producing the fluorescent material, including the steps of: obtaining an aqueous slurry of a raw material; and spray-drying the aqueous slurry with hot air at 80 to 300° C.

The application relates to fluorescent powder which has a garnet structure and can be effectively excited by ultraviolet light or blue light, a method for preparing the fluorescent powder, and a light emitting device, an image display device and an illumination device comprising the fluorescent powder. A chemical formula of the fluorescent powder is expressed as: (M.sup.1a-xM.sup.2x)ZrbM.sup.3cOd, where M.sup.1 is one or two elements selected from Sr, Ca, La, Y, Lu and Gd, Ca or Sr being necessary; M.sup.2 is one or two elements selected from Ce, Pr, Sm, Eu, Tb and Dy, Ce being necessary; M.sup.3 is at least one element selected from Ga, Si, and Ge, Ga being necessary; and 2.8≦a≦3.2, 1.9≦b≦2.1, 2.8≦c≦3.2, 11.8≦d≦12.2, and 0.002≦x≦0.6.

Provided is a phosphor represented by a composition of the following formula (1),

(Sr.sub.a,Ba.sub.b,Ca.sub.c,Eu.sub.x,M.sup.1.sub.d,M.sup.2.sub.e)SiO.sub.f.gMgO  formula (1)

(here, M.sup.1 represents at least one group 3 element selected from Lu and Sc, M.sup.2 represents an alkali metal element selected from Li, Na, and K, and 0<a≦2, 0<b≦2, 0≦c≦2, 0.0015≦d≦0.045, 0≦e≦0.06, 0<x≦0.1, 3.7≦f≦4.1, and 0≦g≦1 are satisfied). In addition, provided is a light-emitting device including the phosphor and a light source for irradiating the phosphor with excitation light to cause the phosphor to emit light.

There is provided a fluorescent material having a composition represented by the following Formula (1). (Sr.sub.a,Ba.sub.b,Eu.sub.x,M.sup.1.sub.1,M.sup.2.sub.e)SiO.sub.f.Math.cMgO . . . Formula (1) (In the formula, M.sup.1 is at least one tertiary group element selected from Y and Tb; M.sup.2 is an alkali metal selected from Li, Na, and K; and 0<a<2, 0<b<2, 0≦c<1, 0.001≦d≦0.06, 0≦e≦0.06, 0<x<0.1, and 3.7≦f≦4.1 are set.) Further, there is provided a light-emitting device including: the fluorescent material; and a light source irradiating the fluorescent material with excitation light to cause the fluorescent material to emit light.

A phosphorescent polycarbonate resin composition comprising, with respect to 100 parts by mass of a polycarbonate resin (A): 0.8 to 20 parts by mass of a red light-emitting phosphorescent material (B1) as a phosphorescent material (B), wherein an L* value measured in accordance with a following method (X) is 65 or more,

the method (X) including: under conditions of a cylinder temperature of 300° C., a mold temperature of 120° C., and a molding cycle of 45 seconds, measuring, with a color-difference meter, the L* of a 3 mm-thick portion of a specimen (in a form of a three-stage plate having a width of 50 mm, a length of 90 mm, and thicknesses of 1 mm, 2 mm, and 3 mm) obtained by injection molding of the phosphorescent polycarbonate resin composition, under following conditions based on JIS 28722:

Reflection measurement: D65 light source, 10-degree field of view

Measurement port: 30 ϕ

Specimen material holder: White

The present invention provides a temperature-sensitive material comprising a ceramic oxide host and a luminescent dopant, wherein the material exhibits one or more phase transformations, a powder comprising the material, a method of fabricating the powder, a coating comprising the material, a method of applying the coating, and a method of determining a thermal history of the material which has been subjected to a high temperature environment.

Disclosed are methods of detecting one or more analytes in a sample by: (1) associating the sample with a surface that includes an analyte binding agent to result in the immobilization of the analytes on the surface; (2) contacting the analyte with a composition that includes at least one phosphor compound with an affinity for the analyte; (3) formation of immobilized analyte binding agent-analyte-phosphor complexes on the surface; (4) separating unbound phosphor compounds from the immobilized complexes; (5) detecting a presence or absence of a luminescence signal from the immobilized complexes; and (6) correlating the luminescence signal to the presence or absence of the analyte in the sample. The phosphor compound may include (Sr.sub.1-Ba.sub.).sub.2-j-kMgSi.sub.2O.sub.7:Eu.sub.jDy.sub.k, (Sr.sub.1-Ba.sub.).sub.2-xMgSi.sub.2O.sub.7:Eu.sup.2+Dy.sup.3+, (Sr.sub.1-Ba.sub.).sub.2MgSi.sub.2O.sub.7:Eu.sup.2+Dy.sup.3+, (Sr.sub.1-Ba.sub.).sub.2-xMgSi.sub.2O.sub.7:Eu.sup.2+, and combinations thereof. Additional phosphor compounds may also be utilized, such as [AE].sub.2MgSi.sub.2O.sub.7:Eu.sup.2+, [AE]Al.sub.2O.sub.4:Eu.sup.2+, Dy.sup.3+, and combinations thereof, where AE is at least one of Ca, Sr, or Ba.

Scintillating compounds, methods of synthesizing scintillating compounds, and applications of scintillating compounds are disclosed. The scintillating compounds can include cesium rare earth silicates. A scintillating compound can include cesium, silicon, oxygen, fluorine, and one or more of europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium and scandium. The scintillating compounds can form unit cells having the general formula Cs.sub.3RESi.sub.4O.sub.10F.sub.2 with RE including rare earth metals, lanthanides, and transition metals.

The present invention is a fluorescent material characterized by being represented by a composition of the following formula (1) and having a crystal lattice distortion obtained from a Williamson-Hall plot by X-ray diffraction within the range of 0.0005 to 0.0020.
(Sr,Ca,M).sub.3-xMgSi.sub.2O.sub.8:Eu.sub.xformula (1)
wherein M is at least one rare earth metal elements selected from the group consisting of Sc, Y, Gd, Tb and La, and 0.01x0.10. Also, the present invention is a light-emitting device including the fluorescent material, and a light source that emits light by irradiating the fluorescent material with excitation light. Furthermore, the present invention is a method for producing the fluorescent material, including the steps of: obtaining an aqueous slurry of a raw material; and spray-drying the aqueous slurry with hot air at 80 to 300 C.