Provided is a wavelength conversion member that is less decreased in luminescence intensity with time by irradiation with light of an LED or LD and a light emitting device using the wavelength conversion member. A wavelength conversion member is formed of an inorganic phosphor dispersed in a glass matrix, wherein the glass matrix contains, in % by mole, 30 to 85% SiO.sub.2, 0 to 20% B.sub.2O.sub.3, 0 to 25% Al.sub.2O.sub.3, 0 to 3% Li.sub.2O, 0 to 3% Na.sub.2O, 0 to 3% K.sub.2O, 0 to 3% Li.sub.2O+Na.sub.2O+K.sub.2O, 0 to 35% MgO, 0 to 35% CaO, 0 to 35% SrO, 0 to 35% BaO, 0.1 to 45% MgO+CaO+SrO+BaO, and 0 to 4% ZnO, and the inorganic phosphor is at least one selected from the group consisting of an oxide phosphor, a nitride phosphor, an oxynitride phosphor, a chloride phosphor, an oxychloride phosphor, a halide phosphor, an aluminate phosphor, and a halophosphate phosphor.

Provided is a wavelength conversion member that is less decreased in luminescence intensity with time by irradiation with light of an LED or LD and a light emitting device using the wavelength conversion member. A wavelength conversion member is formed of an inorganic phosphor dispersed in a glass matrix, wherein the glass matrix contains, in % by mole, 30 to 85% SiO.sub.2, 0 to 20% B.sub.2O.sub.3, 0 to 25% Al.sub.2O.sub.3, 0 to 3% Li.sub.2O, 0 to 3% Na.sub.2O, 0 to 3% K.sub.2O, 0 to 3% Li.sub.2O+Na.sub.2O+K.sub.2O, 0 to 35% MgO, 0 to 35% CaO, 0 to 35% SrO, 0 to 35% BaO, 0.1 to 45% MgO+CaO+SrO+BaO, and 0 to 4% ZnO, and the inorganic phosphor is at least one selected from the group consisting of an oxide phosphor, a nitride phosphor, an oxynitride phosphor, a chloride phosphor, an oxychloride phosphor, a halide phosphor, an aluminate phosphor, and a halophosphate phosphor.

An organic mixture, comprising a first organic compound and a second organic compound that forms an exciplex with the first organic compound. The first organic compound is an aromatic compound containing a triphenylboron heterocycle, and the second organic compound is a compound containing an aromatic fused heterocycle. LUMO.sub.H1, HOMO.sub.H1 and E.sub.T(H1) are respectively defined as the lowest unoccupied orbital, highest occupied orbital and triplet energy levels of the first organic compound, and LUMO.sub.H2, HOMO.sub.H2 and E.sub.T(H2) are respectively defined as the lowest unoccupied orbital, highest occupied orbital and triplet energy levels of the second organic compound, min((LUMO.sub.H1HOMO.sub.H2, LUMO.sub.H2HOMO.sub.H1)min(E.sub.T(H1), E.sub.T(H2))+0.1 eV.

Provided is a glass for radiation detection having high fluorescence detection sensitivity and high weather resistance. A glass for radiation detection, comprising, in mol %, 0.1 to 30% of SiO.sub.2+B.sub.2O.sub.3, 0 to 20% of SiO.sub.2, 0 to 10% of B.sub.2O.sub.3, 40 to 70% of P.sub.2O.sub.5, 10 to 30% of Al.sub.2O.sub.3, 10 to 30% of Na.sub.2O, and 0.01 to 2% of Ag.sub.2O.

The present technology generally relates to a method for modulating in situ production of energy by a biological tissue. The method comprises stimulating the biological tissue by exposing the biological tissue to a photostimulated biophotonic composition for a time sufficient to initiate the production of energy by the biological tissue.

The present invention relates to a novel cyclic compound represented by Formula 1, and an organic light emitting device comprising an organic material layer including the novel cyclic compound and having improved efficiency, low driving voltage, and enhanced lifetime characteristic:

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The present invention provides a gadolinium oxysulfide sintered body having a high light output. The problem is resolved by a gadolinium oxysulfide sintered body in which the ratio of the light transmittance T.sub.410 of 410 nm to the light transmittance T.sub.512 of 512 nm (T.sub.410/T.sub.512) is from 0.31 to 0.61, or a gadolinium oxysulfide sintered body in which the ratio of the diffraction peak intensity I.sub.y of a phase different from gadolinium oxysulfide appearing at 2=from 20 to 29 to the diffraction peak intensity (I.sub.x) of (102) or (011) of gadolinium oxysulfide appearing at 2=301 (I.sub.y/I.sub.x) is 0.1 or less in an XRD diffraction pattern and which contains one or more activators selected from the group consisting of praseodymium, terbium, and cerium.

Presented herein are methods for creating nanoparticles, which exhibit desirable electro-luminescent and photo-luminescent capabilities, while retaining the robust inorganic nature. And incorporating the nanoparticles in micron and sub-micron scale structures, via a range of patterning techniques, to create highly functional meta-material apparatus. Example embodiments include applications in emissive color elements within displays, Micro-LED devices, and thin-film apparatus; integrating optical, photonic and plasmonic properties, from the combination of patternable nano-scale features, with photo/electro-luminescing material capabilities; performing multiple light processing functions, within the apparatus. The method of construction, materials, electrical drive, color and pixel manipulation as well as system integration are described, such that one of ordinary skill in the art could construct implementations including lighting, displays, panels and other applications.

Presented herein are methods for creating nanoparticles, which exhibit desirable electro-luminescent and photo-luminescent capabilities, while retaining the robust inorganic nature. And incorporating the nanoparticles in micron and sub-micron scale structures, via a range of patterning techniques, to create highly functional meta-material apparatus. Example embodiments include applications in emissive color elements within displays, Micro-LED devices, and thin-film apparatus; integrating optical, photonic and plasmonic properties, from the combination of patternable nano-scale features, with photo/electro-luminescing material capabilities; performing multiple light processing functions, within the apparatus. The method of construction, materials, electrical drive, color and pixel manipulation as well as system integration are described, such that one of ordinary skill in the art could construct implementations including lighting, displays, panels and other applications.

The present technology generally relates to a method for modulating in situ production of energy by a biological tissue. The method comprises stimulating the biological tissue by exposing the biological tissue to a photostimulated biophotonic composition for a time sufficient to initiate the production of energy by the biological tissue.