Abstract: [Problem to be Solved] Provided is a red emitting fluorescent material, which has a large excitation band and which is capable of efficiently emitting red fluorescence when excited by light emitted from an ultraviolet light emitting device and a blue light emitting device serving as an excitation source, in particular, even by use of an ultraviolet LED having an emission peak at near 390 nm to 400 nm, and which is capable of emitting red fluorescence when excited not only by ultraviolet and blue light from an ultraviolet light emitting device and a blue light emitting device but also by fluorescence emitted from a fluorescent material upon receipt these light beams, thereby emitting high brightness red light, and then, provided is a white light emitting device capable of emitting white light having excellent color reproducing and rendering properties.

Abstract: A phosphor with a high light-emitting intensity and indicated by general formula MeaRebSicAldNeOf. Me has Sr as an essential element thereof and can include one or more types of CC element selected from Na, Li, Mg, Ca, Ba, Sc, Y, and La. Re has Eu as an essential element thereof and can include one or more types of element selected from Mn, Ce, Tb, Yb, and Sm. When composition ratios a, b, c, d, e, and f fulfill a=1?x, b=x, c=(2+2p)×(1?y), d=(2+2p)×y, e=(1+4p)×(1?z), and f=(1+4p)×z, parameters p, x, y, and z fulfill the following: 1.630<p<1.650, 0.005<x<0.300, 0.180<y<0.220, and 0.060<z<0.100. A light-emitting device with high luminance is provided by using this phosphor.

Abstract: A phosphor indicated by general formula MeaRebSicAldNeOf. In the formula: Me has Sr as an essential element thereof and can include one or more types of element selected from Na, Li, Mg, Ca, Ba, Sc, Y, and La; and Re has Eu as an essential element thereof and can include one or more types of element selected from Mn, Ce, Tb, Yb, and Sm. In addition, when a=1?x, b=x, c=(2+2p)×(1?y), d=(2?2p)×y, e=(1+4p)×(1?z), and f=(1+4p)×z, parameters p, x, y, and z fulfill the following: 1.620<p<1.635, 0.005<x<0.300, 0.200<y<0.250, and 0.070<z<0.110. A light-emitting device with high luminance is provided by using this phosphor.

Abstract: A novel yellow-emitting phosphor is represented by the general formula: Ca1-xAlSi4N7:Eux, and includes calcium (Ca), aluminum (Al), silicon (Si), europium (Eu), and nitrogen (N). In the general formula, x is preferably within a range of 0.001<x?0.15. The yellow-emitting phosphor emits yellow light, which is a complementary color to blue, when excited by blue light and hence can be used to produce warm white light by being combined with a blue light emitting device.

Abstract: This invention is intended to overcome the problems with conventional phosphor materials, specifically to overcome the problems of insufficient luminance and of color impurity on the screens of color display units when green phosphor materials have blue or red light emission. This invention is intended to provide vacuum ultraviolet excited green phosphor materials that include terbium, gadolinium-doped rare-earth aluminum scandium borate represented by the following general formula: (Y1-x-yGdxTby)Al3-zScz(BO3)4 (0?x<0.5, 0<y<0.5, 0<z?3). The phosphor materials of this invention can be used for light-emitting devices. Using the phosphor materials in combination with blue phosphor materials and red phosphor materials enables the formation of white emitting device.

Abstract: This invention is intended to overcome the problems with conventional phosphor materials, specifically to overcome the problems of insufficient luminance and of color impurity on the screens of color display units when green phosphor materials have blue or red light emission. This invention is intended to provide vacuum ultraviolet excited green phosphor materials that include terbium, gadolinium-doped rare-earth aluminum scandium borate represented by the following general formula: (Y1-x-yGdxTby)Al3-zScz(BO3)4 (0?x<0.5, 0<y<0.5, 0<z?3). The phosphor materials of this invention can be used for light-emitting devices. Using the phosphor materials in combination with blue phosphor materials and red phosphor materials enables the formation of white emitting device.

Abstract: The present invention has an object to provide a fluorescent substance containing glass sheet which is suppressed attenuation of intensity of wavelength converted light emitted by a sulfide fluorescent substance, able to increase a life of the light emitting device, and does not bring about environmental pollution by lead, its manufacturing method and a light-emitting device using this. A fluorescent substance containing glass sheet formed by mixing an oxide-coated fluorescent substance particle with glass powder that does not substantially include lead, and sintering them, the oxide-coated fluorescent substance particle having been produced by coating a surface of a sulfide fluorescent substance particle, which is excited by light emission from a light-emitting element and which emits wavelength converted light, with an oxide, wherein attenuation of intensity of said wavelength converted light emitted by said sulfide fluorescent substance particle is suppressed by a forming process.

Abstract: [Problem to be Solved] Provided is a red emitting fluorescent material, which has a large excitation band and which is capable of efficiently emitting red fluorescence when excited by light emitted from an ultraviolet light emitting device and a blue light emitting device serving as an excitation source, in particular, even by use of an ultraviolet LED having an emission peak at near 390 nm to 400 nm, and which is capable of emitting red fluorescence when excited not only by ultraviolet and blue light from an ultraviolet light emitting device and a blue light emitting device but also by fluorescence emitted from a fluorescent material upon receipt these light beams, thereby emitting high brightness red light, and then, provided is a white light emitting device capable of emitting white light having excellent color reproducing and rendering properties.

Abstract: This invention is intended to overcome the problems with conventional phosphor materials, specifically to overcome the problems of insufficient luminance and of color impurity on the screens of color display units when green phosphor materials have blue or red light emission. This invention is intended to provide vacuum ultraviolet excited green phosphor materials that include terbium, gadolinium-doped rare-earth aluminum scandium borate represented by the following general formula: (Y1-x-yGdxTby)Al3-zScz(BO3)4 (0?x?0.5, 0<y<0.5, 0<z?3). The phosphor materials of this invention can be used for light-emitting devices. Using the phosphor materials in combination with blue phosphor materials and red phosphor materials enables the formation of white emitting device.

Abstract: The present invention achieves improvement of the color reproducibility, color rendering properties and light emitting efficiency of a white light emitting diode. The present invention is a red fluorescent material composed of a europium doped calcium lanthanum tungstate represented by a general formula of Ca3(La1?x,Eux)2W2012 (0<x?1). The red fluorescent material can efficiently converts light in the light emission wavelength range from 350 to 410 nm of an ultraviolet light emitting diode into red light, and can efficiently converts blue light at 465 nm and green light at 538 nm into red light.

Abstract: A vacuum ultraviolet-excited phosphor is composed of a gadolinium-activated rare-earth aluminum-scandium borate that is represented by a general formula (Y1-xGdx)Al3-yScy(BO3)4 (where 0<x?1, 0<y?3). This vacuum ultraviolet-excited phosphor, when irradiated by vacuum ultraviolet light having a wavelength of 200 nm or less, can produce ultraviolet light having wavelength in the range from 312 nm to 315 nm with higher efficiency and stronger emitted intensity, and can obtain a higher areal intensity ratio than a phosphor of the prior art.

Abstract: The present invention achieves improvement of the color reproducibility, color rendering properties and light emitting efficiency of a white light emitting diode. The present invention is a red fluorescent material composed of a europium doped lithium lanthanum niobate represented by a general formula of LiLa1-xEuxNb2O7 (0<x?1). The red fluorescent material can efficiently converts light in the light emission wavelength range from 350 to 410 nm of an ultraviolet light emitting diode into red light, and can efficiently converts blue light at 465 nm and green light at 538 nm into red light.

Abstract: An object of the present invention is to provide a green light-emitting fluorescent material which efficiently absorbs lights, has a short afterglow time and emits a green light when an ultraviolet light at a wavelength of 254 nm sent forth by the mercury discharge is used as an excitation source, and a fluorescent lamp with a short response time. A green light-emitting fluorescent material of the present invention is a fluorescent material comprising, at least, calcium, yttrium, aluminum and oxygen, with terbium as an activator at an emission center. This green light-emitting fluorescent material has a composition expressed by the general formula CaY1-xTbxAlO4 (wherein 0.005?x?0.5). Further, Gadolinium and/or lanthanum is, in part, substituted for yttrium and has a composition expressed by the general formula CaY1-x-yTbxReyAlO4 (wherein Re is at least one sort of elements selected between Gd and La, and 0.005?x?0.5, 0.1?y?0.7).

Abstract: This invention is intended to overcome the problems with conventional phosphor materials, specifically to overcome the problems of insufficient luminance and of color impurity on the screens of color display units when green phosphor materials have blue or red light emission. This invention is intended to provide vacuum ultraviolet excited green phosphor materials that include terbium, gadolinium-doped rare-earth aluminum scandium borate represented by the following general formula: (Y1-x-yGdxTby)Al3-zScz(BO3)4 (0?x<0.5, 0<y<0.5, 0<z?3). The phosphor materials of this invention can be used for light-emitting devices. Using the phosphor materials in combination with blue phosphor materials and red phosphor materials enables the formation of white emitting device.

Abstract: The present invention achieves improvement of the color reproducibility, color rendering properties and light emitting efficiency of a white light emitting diode. The present invention is a red fluorescent material composed of a europium doped calcium lanthanum tungstate represented by a general formula of Ca3(La1?x,Eux)2W2012 (0<x?1). The red fluorescent material can efficiently converts light in the light emission wavelength range from 350 to 410 nm of an ultraviolet light emitting diode into red light, and can efficiently converts blue light at 465 nm and green light at 538 nm into red light.

Abstract: The present invention achieves improvement of the color reproducibility, color rendering properties and light emitting efficiency of a white light emitting diode. The present invention is a red fluorescent material composed of a europium doped lithium lanthanum niobate represented by a general formula of LiLa1-xEuxNb2O7 (0<x?1). The red fluorescent material can efficiently converts light in the light emission wavelength range from 350 to 410 nm of an ultraviolet light emitting diode into red light, and can efficiently converts blue light at 465 nm and green light at 538 nm into red light.

Abstract: A vacuum ultraviolet-excited phosphor is composed of a gadolinium-activated rare-earth aluminum-scandium borate that is represented by a general formula (Y1-xGdx)Al3-yScy(BO3)4 (where 0<x?1, 0<y?3). This vacuum ultraviolet-excited phosphor, when irradiated by vacuum ultraviolet light having a wavelength of 200 nm or less, can produce ultraviolet light having wavelength in the range from 312 nm to 315 nm with higher efficiency and stronger emitted intensity, and can obtain a higher areal intensity ratio than a phosphor of the prior art.