摘要:
A light-emitting device includes a light-emitting element and a phosphor that absorbs at least a portion of light from the light-emitting element and emits light. The phosphor includes two or more types of phosphors each having a light emission peak wavelength in a different range. The two or more types of phosphors are selected from the group consisting of a first phosphor having a light emission peak wavelength within a first range of 700 nm to less than 800 nm, a second phosphor having a light emission peak wavelength within a second range of 800 nm to less than 1100 nm, and a third phosphor having a light emission peak wavelength within a third range of 1100 nm to less than 1500 nm.
摘要:
This invention provides an orange-yellow-emitting phosphor, the preparation method and the use thereof. This orange-yellow-emitting phosphor has a general formula represented by formula I: Sr9−a−b−xMaMg1.5+b(PO4)7:xEu2+ formula I; wherein in formula I, said M is one or two of Ca and Ba; and 0.001≤x≤0.9, 0≤a≤1.0, 0≤b≤2.3. This orange-yellow-emitting phosphor uses a phosphate as the host material and Eu2+ ions as activation ions. The chemical properties of the phosphor are stable. The phosphor has relatively wide excitation band and emission band. And the red component in its emission spectrum is abundant, therefore, coupling the blue InGaN chip with the orange-yellow-emitting phosphor provided by this invention can obtain warm white light. The phosphor is radiation free, therefore, it will not be harmful to the environment. It is indicated by experimental results that this orange-yellow-emitting phosphor can be effectively excited by light at a wavelength of 250-500 nm and emits a wide peak at 470-850 nm, wherein the main emission peaks lie at about 523 nm and 620 nm. This preparation method is simple, and the cost is relatively low, so it is amenable to industrial production.
摘要:
The invention relates to novel inorganic brighteners, a process for their preparation and their use for brightening substrates. More specifically, the novel inorganic brighteners are phosphors characterized in that they have (i) an absorption maximum in the range of from 350 to 375 nm; (ii) a steep decrease of the absorption band near 400 nm; (iii) a quantum yield of the phosphorescence of at least 0.8; and (iv) a phosphorescence maximum in the range between 415 and 445 nm.
摘要:
The present invention relates to a phosphor comprising a nitride or an oxynitride, comprising an X-ray powder diffraction pattern comprising at least one Region having at least one peak with an intensity ratio I of 8% or less, the X-ray powder diffraction pattern measured in the 2θ range from 10° to 60° using a CuKα line (1.54184 {acute over (Å)}), wherein the Region is the 2θ range from 41.5° to 47°, the intensity of each peak is a value obtained after background correction, and the intensity ratio I is defined by the formula (Ip×100)/Imax(%), where Imax represents the height of the most intense peak present in the 2θ range from 34° to 37° and Ip represents the height of each peak.
摘要:
A light emitting device is disclosed. The light emitting device may include a light emitting diode (LED) for emitting light and phosphor adjacent to the LED. The phosphor may be excitable by light emitted by the LED and may include a first compound having a host lattice comprising first ions and oxygen. In one embodiment, the host lattice may include silicon, the copper ions may be divalent copper ions and first compound may have an Olivin crystal structure, a β-K2SO4 crystal structure, a trigonal Glaserite (K3Na(SO4)2) or monoclinic Merwinite crystal structure, a tetragonal Ackermanite crystal structure, a tetragonal crystal structure or an orthorhombic crystal structure. In another embodiment, the copper ions do not act as luminescent ions upon excitation with the light emitted by the LED.
摘要:
A halosilicate phosphor represented by Formula 1 p(Ca1-xM1x)O.qM2O2.rM3A2:sM4 wherein M1 includes at least one selected from a group consisting of Sr2+ and Ba2+; M2 includes at least one selected from a group consisting of Si4+ and Ge4+; M3 includes at least one selected from a group consisting of Ca2+, Sr2+ and Ba2+; M4 includes at least one selected from a group consisting of Eu2+, Mn2+, Sb2+, Ce3+, Pr3+, Nd3+, Sm3+, Tb3+, Dy3+, Ho3+, Er3+, Yb3+ and Bi3+; A includes at least one selected from a group consisting of F−, Cl−, Br− and I−; and wherein 0≦x
摘要:
A green phosphor, has an orthorhombic structure of a Pnma space group and the Formula 1: (M11-xDx)pM2qOrAs [Formula 1] wherein M1 is magnesium, calcium, strontium, barium, and any combination thereof, D is at least one of metal selected from the group consisting of europium, manganese, antimony, cerium, praseodymium, neodymium, samarium, terbium, dysprosium, erbium, ytterbium, bismuth, and any combination thereof, M2 is at least one selected from the group consisting of silicon, germanium, aluminum, gallium, and any combination thereof, A is at least one selected from the group consisting of chlorine, fluorine, bromine, iodine, and any combination thereof, and 2.7≦p≦3.3, 0.7≦q≦1.3, 3.5≦r≦4.5, 1.7≦s≦2.3, and 0
摘要:
The present invention provides an alloy powder that is a material for producing inorganic functional materials such as phosphors, a phosphor with high brightness, and a method for producing the phosphor. An alloy powder for an inorganic functional material precursor contains at least one metal element and at least one activating element M1 and has a weight-average median diameter D50 of 5 μm to 40 μm. A method for producing a phosphor includes a step of heating an alloy, containing two or more metal elements for forming the phosphor, in a nitrogen-containing atmosphere.
摘要:
High thermal conductivity fiber, flake, elongated particle, and belts, which exhibit luminescent properties, are fillers within a matrix to form solid luminescent elements. The use of sol-gel, sintering, melt, and high pressure firing consolidates these materials. Articles constructed from the solid luminescent element can be used in lighting, displays and other semiconductor applications.
摘要:
Disclosed are a nanoparticle-doped porous bead with a highly enhanced photoluminescence without wavelength shift and improved durability, and a fabrication method thereof, the nanoparticle-doped porous bead comprising porous beads, and nanoparticles radially bonded onto homocentric spheres of the porous beads by an electrostatic attractive force, the homocentric sphere located inside the porous bead near a surface thereof, wherein the nanoparticles are photoluminescent nanoparticles or mixed nanoparticles of photoluminescent nanoparticles and another nanoparticles, wherein the another nanoparticle is one or more than two mixed, selected from a group consisting of magnetic nanoparticle, metallic nanoparticle and metal oxide nanoparticle.