Abstract: The present invention relates to a light emitting apparatus including a semiconductor light emitting element and a transparent ceramic phosphor for converting a wavelength of a light emitted from the semiconductor light emitting element, wherein the semiconductor light emitting element emits an ultraviolet light, and the ceramic phosphor corresponding to the semiconductor light emitting element has (i) a minimum transmission of 0.1 to 40% under a wavelength of 350-420 nm and (ii) a transmission of 10 to 90% under an emission peak wavelength of the ceramic phosphor.

Abstract: A luminescent material which is featured in that it exhibits an emission peak at a wavelength ranging from 490 to 580 nm as it is excited by light having a wavelength ranging from 250 to 500 nm and that it has a composition represented by the following general formula (2): (M1-xRx)a2AlSib2Oc2Nd2??(2) (In the general formula (2), M is at least one metallic element excluding Si and Al, R is a luminescence center element, and x, a2, b2, c2 and d2 satisfy the following relationships: 0<x?1, 0.93<a2<1.3, 4.0<b2<5.8 0.6<c2<1, 6<d2<11).

Abstract: A method for manufacturing a fluorescent substance is provided, which includes mixing a raw material for Eu, a raw material for Si, at least one raw material powder of alkaline earth, and at least one selected from the group consisting of raw materials for La , Gd, Cs, and K to obtain a mixture of raw materials; pre-firing the mixture to obtain a baked material; mixing the baked material and firing in a reducing atmosphere consisting of a mixed gas of N2/H2 to obtain a first fired product; pulverizing the first fired product to obtain a pulverized first fired product; firing the pulverized first fired product in a reducing atmosphere consisting of N2/H2 to obtain a fluorescent substance consisting of an alkaline earth ortho-silicate; pulverizing the fluorescent substance to obtain a fluorescent particle; sieving the fluorescent particle; and providing a surface-covering material on a surface of the fluorescent particle.

Abstract: A fluorescent substance is provided, with includes a matrix composed of a compound having an AlN polytypoid structure represented by the following general formula (1), and a luminescence center element: (Al,M)a(N,X)b??(1) wherein, M is at least one metal excluding Al, X is at least one non-metal excluding N, and a and b are positive values.

Abstract: A europium-activated alkaline earth orthosilicate luminescent material is provided, which includes a compound having a composition represented by a following formula 1: (SrxBayCazEuw)2SiO4??formula 1 wherein, x, y, z and w satisfy following relational expressions 2, and 4 to 7, and are values satisfying the expression 3 when a, b, c and d are assumed to be 573, 467, 623 and 736, respectively: x+y+z+w=1??expression 2 600?ax+by+cz+dw??expression 3 0?x/(1?w)?0.95??expression 4 0?y/(1?w)?0.4??expression 5 0<z/(1?w)?0.95??expression 6 0.02?w?0.2??expression 7 the luminescent material shows an emission band having a peak wavelength of 600 nm or more when the luminescent material is excited by ultraviolet radiation having a wavelength of 254 nm.

Abstract: An field effect transistor includes a first semiconductor region, a gate electrode insulatively disposed over the first semiconductor region, source and drain electrodes between which the first semiconductor region is sandwiched, and second semiconductor regions each formed between the first semiconductor region and one of the source and drain electrodes, and having impurity concentration higher than that of the first semiconductor region, the source electrode being offset to the gate electrode in a direction in which the source electrode and the drain electrode are separated from each other with respect to a channel direction, and one of the second semiconductor regions having a thickness not more than a thickness with which the one of second semiconductor regions is completely depleted in the channel direction being in thermal equilibrium with the source electrode therewith.

Abstract: Disclosed is a fluorescent substance comprising an alkaline earth ortho-silicate, the fluorescent substance being activated by Eu2+, and further comprising at least one selected from the group consisting of La, Gd, Cs and K.

Abstract: An field effect transistor includes a first semiconductor region, a gate electrode insulatively disposed over the first semiconductor region, source and drain electrodes between which the first semiconductor region is sandwiched, and second semiconductor regions each formed between the first semiconductor region and one of the source and drain electrodes, and having impurity concentration higher than that of the first semiconductor region, the source electrode being offset to the gate electrode in a direction in which the source electrode and the drain electrode are separated from each other with respect to a channel direction, and one of the second semiconductor regions having a thickness not more than a thickness with which the one of second semiconductor regions is completely depleted in the channel direction being in thermal equilibrium with the source electrode therewith.

Abstract: A luminescent material is provided, which includes a material formed of a single composition containing the main crystal phase and an activator which causes light emission. The material exhibits a narrowband light emission spectrum in a wavelength ranging from 540 nm to 550 nm and a broadband light emission spectrum in a wavelength ranging from 500 nm to 600 nm when the material is excited with light having the main light emission peak having a wavelength ranging from 370 nm to 460 nm.

Abstract: A luminescent material which is featured in that it exhibits an emission peak at a wavelength ranging from 490 to 580 nm as it is excited by light having a wavelength ranging from 250 to 500 nm and that it has a composition represented by the following general formula (2): (M1-xRx)a2AlSib2Oc2Nd2??(2) (In the general formula (2), M is at least one metallic element excluding Si and Al, R is a luminescence center element, and x, a2, b2, c2 and d2 satisfy the following relationships: 0<x?1, 0.93<a2<1.3, 4.0<b2<5.8 0.6<c2<1, 6<d2<11).

Abstract: A light emitting apparatus 1 comprises: a semiconductor light emitting element 2; and a transparent ceramic phosphor 11 for converting a wavelength of a light emitted from the semiconductor light emitting element 2, wherein the semiconductor light emitting element 2 emits an ultraviolet light, and the ceramic phosphor 11 corresponding to the semiconductor light emitting element 2 has: a minimum transmission of 0.1 to 40% under a wavelength of 350-420 nm; and a transmission of 10 to 90% under an emission peak wavelength of the ceramic phosphor.

Abstract: A luminescent material is provided, which includes a material formed of a single composition containing the main crystal phase and an activator which causes light emission. The material exhibits a narrowband light emission spectrum in a wavelength ranging from 540 nm to 550 nm and a broadband light emission spectrum in a wavelength ranging from 500 nm to 600 nm when the material is excited with light having the main light emission peak having a wavelength ranging from 370 nm to 460 nm.

Abstract: Disclosed is a fluorescent substance comprising an alkaline earth ortho-silicate, the fluorescent substance being activated by Eu2+, and further comprising at least one selected from the group consisting of La, Gd, Cs and K.

Abstract: Disclosed is a fluorescent substance comprising an alkaline earth ortho-silicate, the fluorescent substance being activated by Eu2+, and further comprising at least one selected from the group consisting of La, Gd, Cs and K.

Abstract: Disclosed is a method for manufacturing a nitrogen-containing fluorescent substance comprising accommodating an oxide fluorescent substance containing two or more elements in a receptacle made of a material containing carbon, and sintering the oxide fluorescent substance in a mixed gas atmosphere containing nitrogen gas.

Abstract: An field effect transistor includes a first semiconductor region, a gate electrode insulatively disposed over the first semiconductor region, source and drain electrodes between which the first semiconductor region is sandwiched, and second semiconductor regions each formed between the first semiconductor region and one of the source and drain electrodes, and having impurity concentration higher than that of the first semiconductor region, the source electrode being offset to the gate electrode in a direction in which the source electrode and the drain electrode are separated from each other with respect to a channel direction, and one of the second semiconductor regions having a thickness not more than a thickness with which the one of second semiconductor regions is completely depleted in the channel direction being in thermal equilibrium with the source electrode therewith.

Abstract: Disclosed is a method for manufacturing a nitrogen-containing fluorescent substance comprising accommodating an oxide fluorescent substance containing two or more elements in a receptacle made of a material containing carbon, and sintering the oxide fluorescent substance in a mixed gas atmosphere containing nitrogen gas.

Abstract: A luminescent material is provided, which includes a material formed of a single composition containing the main crystal phase and an activator which causes light emission. The material exhibits a narrowband light emission spectrum in a wavelength ranging from 540 nm to 550 nm and a broadband light emission spectrum in a wavelength ranging from 500 nm to 600 nm when the material is excited with light having the main light emission peak having a wavelength ranging from 370 nm to 460 nm.

Abstract: A europium-activated alkaline earth orthosilicate luminescent material is provided, which includes a compound having a composition represented by a following formula 1: (Srx Bay Caz Euw)2SiO4??formula 1 wherein, x, y, z and w satisfy following relational expressions 2, and 4 to 7, and are values satisfying the expression 3 when a, b, c and d are assumed to be 573, 467, 623 and 736, respectively: x+y+z+w=1??expression 2 600?ax+by+cz+dw??expression 3 0?x/(1?w)?0.95??expression 4 0?y/(1?w)?0.4??expression 5 0<z/(1?w)?0.95??expression 6 0.02?w?0.2??expression 7 the luminescent material shows an emission band having a peak wavelength of 600 nm or more when the luminescent material is excited by ultraviolet radiation having a wavelength of 254 nm.

Abstract: An X-ray detector (5) comprises an X-ray-electric charge conversion film (21) for directly converting into charges an incident X-ray that has passed through a subject (2) and is received, and a charge information reading section (15) for detecting charges produced by the X-ray-electric charge conversion film (21) as image signals. The X-ray-electric charge conversion film (21) consists essentially of a rare-earth compound containing at least one of rare-earth element and at least one of element selected from oxygen, sulfur, selenium and tellurium. The X-ray-electric charge conversion film (21) does not adversely affect human bodies and environment, and is excellent in sensitivity, film-forming feature and the like. Accordingly, the X-ray detector (5) which is provided with the improved X-ray detection sensitivity, detection accuracy and the like with environmental loads and the like decreased can be provided.