Abstract: A manufacturing method of an LED device includes the following steps. First, a substrate and at least one LED disposed on the substrate are provided. Next, a porous material layer having a plurality of pores is formed on a surface of the LED. Finally, a plurality of nanocrystals are formed in the pores to construct a phosphor layer on the surface of the LED.

Abstract: The semiconductor light emitting device of the present invention emits a blue light component, a green light component, and a red light component. The blue light component is a light component emitted by a first solid light emitting element that emits light having an emission peak in a wavelength range of 430 nm to less than 490 nm, the green light component is light emitted by a second solid light emitting element that emits light having an emission peak in a wavelength range of 360 nm to less than 420 nm that is converted into wavelength-converted light by a green phosphor, and the red light component is light emitted by at least one solid light emitting element selected from the first solid light emitting element and the second solid light emitting element that is converted into wavelength-converted light by a red phosphor. The green phosphor emits green light on the basis of an electronic energy transition of Mn2+.

Abstract: A fluorescent lamp includes a glass envelope that is light transmitting. There is means for providing a discharge inside the envelope. A discharge-sustaining fill of mercury and an inert gas is sealed inside the envelope. An underlying phosphor-containing layer is disposed inside the envelope. The underlying layer includes yttrium vanadate phosphor. A protective phosphor-containing layer is disposed over the underlying layer at a location that is more distal from the glass than the underlying layer.

Abstract: The present invention provides a blue phosphor having high luminance and showing less luminance degradation during driving of a light-emitting device. The present invention is a blue phosphor that includes: an alkaline earth metal aluminate represented by a general formula aBaO.bSrO.(1?a?b)EuO.cMgO.dAlO3/2, where 0.70?a?0.95, 0?b?0.15, 0.95?c?1.15, 9.00?d?11.00, and a+b?0.97 are satisfied; and 0.008 mol to 0.800 mol of MWO4 with respect to 1 mol of the aluminate, where M is at least one element selected from a group consisting of Ba, Sr, and Ca.

Abstract: A fluorescent lamp comprises a glass envelope that is light transmitting. Also included is means for providing a discharge inside the envelope. A discharge-sustaining fill includes mercury and an inert gas sealed inside the envelope. An underlying phosphor-containing layer is disposed inside the envelope. The underlying layer includes zinc silicate phosphor. A protective phosphor-containing layer is disposed over the underlying layer at a location that is more distal from the glass than the underlying layer. A ratio of a surface density of the protective layer to a surface density of the underlying layer is at least 0.4:1.

Abstract: A fluorescent lamp includes a glass envelope that is light transmitting. There is means for providing a discharge inside the envelope. A discharge-sustaining fill of mercury and an inert gas is sealed inside the envelope. An underlying phosphor-containing layer is disposed inside the envelope. The underlying layer includes yttrium vanadate phosphor. A protective phosphor-containing layer is disposed over the underlying layer at a location that is more distal from the glass than the underlying layer.

Abstract: A phosphor layer of a plasma display panel has a green phosphor layer containing Zn2SiO4:Mn particles and (Y1-x, Gdx)3(Al1-y, Gay)5O12:Ce particles. The Zn2SiO4:Mn particles satisfy requirements of Zn3p/Si2p?2.10 (1), and Zn2p/Si2p?1.25 (2) wherein Zn3p represents an emission amount of photoelectrons emitted from a 3p orbit of a Zn element in a region up to 10 nm from surfaces of the particles, Zn2p represents an emission amount of photoelectrons emitted from a 2p orbit of the Zn element in a region up to 3 nm from the surfaces of the particles, and Si2p represents an emission amount of photoelectrons emitted from a 2p orbit of a Si element in the region up to 10 nm from the surfaces of the particles.

Abstract: A phosphor layer of a plasma display panel has a green phosphor layer containing Zn2SiO4:Mn particles. The Zn2SiO4:Mn particles satisfy requirements of Zn3p/Si2p?2.06 (1), and Zn2p/Si2p?1.23 (2) wherein Zn3p represents an emission amount of photoelectrons emitted from a 3p orbit of a Zn element in a region up to 10 nm from surfaces of the particles, Zn2p represents an emission amount of photoelectrons emitted from a 2p orbit of the Zn element in a region up to 3 nm from the surfaces of the particles, and Si2p represents an emission amount of photoelectrons emitted from a 2p orbit of a Si element in the region up to 10 nm from the surfaces of the particles.

Abstract: A method of preparing a halophosphate phosphor represented by Formula 1, the method comprising: mixing a metallic precursor compound, which comprises strontium pyrophosphate, strontium chloride and strontium carbonate, and an activator precursor compound to form a mixture; sintering the mixture under an oxygen or air atmosphere to form a sintered mixture; milling the sintered mixture to form a milled product, and sintering the milled product under a reducing atmosphere: (Sr5-(x+y)AxM?y)(PO4)3Cl.(M2O3)z??Formula 1 wherein A is barium or calcium, M? is an activator and comprises at least one cation selected from the group consisting of Eu2+, Mn2+, Sb2+, Ce3+, Pr3+, Nd3+, Sm3+, Tb3+, Dy3+, Ho3+, Er3+, Yb3+ and Bi3+, M is aluminum, yttrium or lanthanum, 0?x?4.8, 0<y?0.2, and 0?z<0.1.

Abstract: The present invention relates to novel phosphors, which are represented by a formula of (A1-xMx)8D12O24S2, wherein x, A, M and D are defined the same as the specification. In addition, the present invention further provides a light-emitting device using the above novel phosphors.

Abstract: The blue phosphor of the present invention includes ZrO2 and a metal aluminate that is represented by the general formula aBaO.bSrO.(1?a?b)EuO.cMgO.dAlO3/2.eWO3, where 0.70?a?0.95, 0?b?0.15, 0.95?c?1.15, 9.00?d?11.00, 0.001?e?0.200, and a+b?0.97 are satisfied. This blue phosphor has a ZrO2 content of 0.01 to 1.00% by weight. In the blue phosphor of the present invention, two peaks whose tops are located in a range of diffraction angle 2?=13.0 to 13.6 degrees are present in an X-ray diffraction pattern obtained by measurement on the blue phosphor using an X-ray with a wavelength of 0.774 ?.

Abstract: The invention provides a phosphor composed of (M1?xREx)5SiO4?yX6+2y, wherein M is Ba individually or in combination with at least one of Mg, Ca, Sr, or Zn; RE is Y, La, Pr, Nd, Eu, Gd, Tb, Ce, Dy, Yb, Er, Sc, Mn, Zn, Cu, Ni, or Lu; X is F, Cl, Br, or combinations thereof; 0.001?x?0.6, and 0.001?y?1.5. Under excitation, the phosphor of the invention emits visible light and may be collocated with other phosphors to provide a white light illumination device.

Abstract: In accordance with one aspect of the present invention, a phosphor precursor composition is provided. The phosphor precursor composition includes gamma alumina, strontium oxide precursor, europium oxide precursor, and an alkaline earth metal precursor other than strontium oxide precursor which affords a phosphor having a formula selected from the group consisting of Sr4Al14O25:Eu2+, Sr4-a-zAaEUzAl14O25, and combinations thereof upon thermal treatment at a temperature above 800° C., wherein A is an alkaline earth metal other than strontium, 0?a<4; 0.001<z<0.3; and 4-a-z>0. Another aspect of the present invention provides a phosphor composition. Also provided in another aspect of the invention is a method of making the phosphor and a lighting apparatus including the phosphor.

Abstract: A light emitting device comprises at least one light emitter, typically an LED, operable to generate blue light and a wavelength conversion component. The wavelength conversion component can be light transmissive or light reflective and comprises at least two phosphor materials that are operable to absorb at least a portion of said blue light and emit light of different colors and wherein the emission product of the device comprises the combined light generated by the LED(s) and the phosphor materials. The phosphor materials are configured as a pattern of non-overlapping areas on a surface of the component.

Abstract: The invention relates to a fluorescent coating for Hg low-pressure discharge lamps, comprising a fluorescent composition from at least one green fluorescent material emitting in the green spectral range, especially a Tb-and/or Eu-doped green fluorescent material, and a red fluorescent material emitting in the red spectral range, especially a Eu and/or Mn red fluorescent material. The invention is characterized in that a further fluorescent material is present which is adapted to absorb UV Hg and Hg-Vis radiation.

Abstract: Cerium, gadolinium and terbium doped aluminum phosphates of formula I may be used in fluorescent lamps Al1-x-y-z-a-b-c-d-eTbxCeyGdzLuaScbIncLadGaePO4??I wherein x is greater than or equal to about 0.001 and less than or equal to about 0.3; y is greater than or equal to about 0.001 and less than or equal to about 0.3; z is greater than or equal to about 0.01 and less than or equal to about 0.3; a is greater than or equal to about 0.01 and less than or equal to about 0.1; b is greater than or equal to about 0.01 and less than or equal to about 0.1; c is greater than or equal to about 0.01 and less than or equal to about 0.1. d is greater than or equal to about 0.01 and less than or equal to about 0.1; and e is greater than or equal to about 0.01 and less than or equal to about 0.1.

Abstract: A blue-green emitting Ce3+-activated oxyfluoride phosphor for use with a light emitting diode (LED) in solid state lighting applications. The blue-green emitting Ce3+-activated oxyfluoride phosphor is represented as: (Sr1-x-yAEy)3(Al1-zTz)O4F:Ce3+x wherein 0<x?0.3, 0?y?1, AE includes at least one element selected from alkaline earth metals on the periodic table, for example, Mg, Ca and Ba, 0?z?1, and T includes at least one atom selected from Al, B, Ga, and In. The blue-green emitting Ce3+-activated oxyfluoride phosphor may be combined with another phosphor to generate the white light. Specifically, the present invention provides for white light generation by combining the blue-green emitting Ce3+-activated oxyfluoride phosphor with either a near-ultraviolet (UV) LED and red emitting phosphor, or with a near-UV LED and a red-yellow phosphor.

Abstract: A low-pressure mercury or amalgam lamp with praseodymium (Pr) doped particles of lanthanum phosphate converts 185 nm radiation to UV-C (186 nm-280 nm). For water purification, a plurality of low-pressure mercury or amalgam lamps with phosphor that convert 185 nm radiation to UV-C (186 nm-280 nm) may be used. A method for photolysis of nitroso dimethyl amine (NDMA) may include passing electrical current through a low pressure mercury or amalgam lamp, radiating 254 nm radiation through the lamp envelope into water containing the NDMA, converting 185 nm radiation within the lamp into 230 nm-240 nm radiation within the lamp via a phosphor within the lamp, and radiating the 230-240 nm radiation through the lamp envelope and into the water containing the NDMA, with the radiation from the lamp photolysizing the NDMA.

Abstract: A luminescent material includes an aluminate phosphor of formula I A1+xMg1+yAl10+zO17+x+y+1.5z:Eu2+, R3+, where 0?x?0.4, 0?y?1 and 0?z?0.2. A is selected from Ca, Ba, and Sr and combinations thereof. The aluminate phosphor is doped with a rare earth ion (R3+), which exists in stable multi-valence states in the luminescent material. R3+ is selected from the group consisting of Sm3+, Yb3+, Tm3+, Ce3+, Tb3+, Pr3+ and combinations thereof. Phosphors of formula I may be blended with other blue, yellow, orange, green, and red phosphors to yield white light phosphor blends. A lighting apparatus including such a luminescent material is also presented. The light apparatus includes a light source in addition to the luminescent material.

Abstract: The present invention provides a plasma display device that has light emission properties with short persistence where green light has a persistence time of 3.5 msec or less, that is excellent in luminance, luminance degradation resistance, and color tone, and that is suitable for, for example, a stereoscopic image display device.

Abstract: An optoelectronic component having a basic housing or frame and at least one semiconductor chip, specifically a radiation-emitting or -receiving semiconductor chip, in a cavity of the basic housing. In order to increase the efficiency of the optoelectronic component, reflectors are provided in the cavity in the region around the semiconductor chip. These reflectors are formed by virtue of the fact that a filling compound filled at least partly into the cavity is provided, the material and the quantity of the filling compound being chosen in such a way that the filling compound, on account of the adhesion force between the filling compound and the basic housing, assumes a form which widens essentially conically from bottom to top in the cavity, and the conical inner areas of the filling compound serve as reflector.

Abstract: A light emitting device according to one embodiment includes a light emitting element that emits light having a wavelength of 380 nm to 470 nm; a CASN first red phosphor that is disposed on the light emitting element; a sialon second red phosphor that is disposed on the light emitting element; and a sialon green phosphor that is disposed on the light emitting element.

Abstract: To provide a phosphor given by a general composition formula expressed by MmAaBbOoNn:Z, (wherein element M is one or more kinds of elements having bivalent valency, element A is one or more kinds of elements having tervalent valency, element B is one or more kinds of elements having tetravalent valency, O is oxygen, N is nitrogen, and element Z is one or more kind of activating agent, satisfying m>0, a>0, b>0, o?0, and n>0), with a change rate of a ratio of element B atoms to the total numbers of atoms being smaller by 10% or the change rate of oxygen atoms to the total numbers of atoms being smaller by 40% in a range from a particle surface up to depth 2000 nm, having a broad emission spectrum in a range of blue color, having a broad flat excitation band in a range of near ultraviolet/ultraviolet, and having excellent emission efficiency, emission intensity, and luminance.

Abstract: The present invention discloses a porous phosphor and manufacturing method of the same. The method includes manufacturing an organic-inorganic hybrid porous structure from solution comprising deep eutectic solvent, the 13th group metal source, phosphorous acid source, and counter species source. With 4,4?-trimethylenedipyridine, the structure can be used as an intrinsic phosphor owning properties of photoluminescence without doping additional activator. The present invention also discloses a lighting device coated with the porous phosphor.

Abstract: A fluorescence material and a white light illumination element are provided. The white light illumination element includes a light emitting diode (LED) chip, a first fluorescence material, and a second fluorescence material. The LED chip is configured on a substrate and emits an exciting light. The first fluorescence material and the second fluorescence material are configured on the LED chip. A composition of the first fluorescence material includes an aluminum nitride oxide doped with at least one of europium (Eu) and manganese (Mn). A first emitted light emitted by the first fluorescence material after the first fluorescence material absorbs the exciting light emitted from the LED chip and a second emitted light emitted by the second fluorescence material after the second fluorescence material absorbs the exciting light emitted from the LED chip are mixed to generate a white light.

Abstract: The present invention relates to a fluorescent lamp including: a discharge space containing a discharge gas and being surrounded by a glass; a discharge electrode; a phosphor; and a mayenite type compound provided on at least a part of an inner surface contacting the discharge gas. According to the fluorescent lamp of the present invention, a fluorescent lamp that has good luminous efficiency of ultraviolet ray from a discharge gas, has good discharge characteristics such as discharge starting voltage and discharge sustaining voltage in a fluorescent lamp, is chemically stable, has excellent oxidation resistance, has excellent sputtering resistance, and can achieve electric power saving is provided.

Abstract: In a fluorescent lamp, a fluorescent material has a particle size of not greater than 1 ?m and a thickness of not greater than 5 ?m. With this structure, ultraviolet ray of 254 nm is efficiently converted into visible light and the light obtained by conversion is efficiently emitted to the outside.

Abstract: A photoluminescent device and a photoluminescent exit sign. The photoluminescent device includes a polymer matrix having a light-emitting exterior surface for emission of photoluminescent light therefrom. The photoluminescent device has a plurality of UV or visible-light excited phosphor particles included in the polymer matrix. The phosphor particles have a concentration greater in an exterior region of the polymer matrix proximate the light-emitting exterior surface than in an interior region of the polymer matrix. The exit sign includes at least two plates interlocked together with at least one typographical character disposed on the plates. The typographical character is formed from the polymer matrix containing the phosphor particles.

Abstract: A reduced wattage gas discharge lamp and method of making same. The gas discharge lamp includes a light transmissive envelope with an inner surface, having a light scattering reflective layer disposed thereon. A phosphor layer is coated on an inner surface of the light scattering reflective layer. A discharge-sustaining gaseous mixture is retained inside the light-transmissive envelope. The discharge-sustaining gaseous mixture includes at least 88% argon, by volume, at a low pressure. An electrode is located within the light-transmissive envelope. The electrode is capable of providing an electric discharge to trigger a reaction within the light-transmissive envelope to cause the lamp to emit light. The remainder of the discharge-sustaining gaseous mixture is substantially neon, at a low pressure. The low pressure is about 3.6 Torr.

Abstract: A lamp having improved color quality scale is provided. The lamp has a light-transmissive envelope and a phosphor layer comprising a first phosphor and a second phosphor wherein the first phosphor has an emission band with a maximum between 590 nm and 640 nm and the second phosphor has an emission band with a maximum between 520 nm and 570 nm. The light generated by the phosphor layer, when the lamp is energized, has delta chroma values for all fifteen color samples of the color quality scale within select parameters. The delta chroma values are measured in the CIE LAB color space.

Abstract: Disclosed is a dispersant having a multifunctional head, and a phosphor paste composition comprising the dispersant. The dispersant has a multifunctional head that comprises an acidic group, a basic group and an aromatic group, thereby enhancing an affinity for the surface of phosphor particles and improving dispersibility.

Abstract: Electrode and electrode pad configurations for a gas discharge device having one or more substrates and a multiplicity of pixels or sub-pixels that are defined by a hollow plasma-shell filled with an ionizable gas. The invention is described with reference to a plasma-dome, but other plasma-shell geometric shapes may be used including plasma-discs and plasma-spheres.

Abstract: There are provided phosphors having high luminous efficiency at desired wavelengths and good light output stability and a light emitting device using the same. A phosphor according to an aspect of the invention includes a sulfide crystallographic phase and an oxide crystallographic phase. Here, the phosphor is a multiphase compound in which the sulfide crystallographic phase and the oxide crystallographic phase exist together.

Abstract: A blue phosphor, a display device including the same, and associated methods, the blue phosphor including BaMgAl10O17:Eu (BAM) phosphor particles having a surface component and an internal component, wherein an aluminum/barium (Al/Ba) molar ratio of the surface component of the phosphor particles is 1.1 to about 1.4 times the Al/Ba molar ratio of the internal component of the phosphor particles, and the Al/Ba molar ratios are continuously variable between the internal component and the surface component.

Abstract: A green phosphor for a plasma display panel and a plasma display panel including the same, the green phosphor including a first phosphor of YAl5O12:Ce, and a second phosphor of Zn1-xMgx (Ga1-yAly)2O4:Mn, wherein 0?x<1, 0?y<1.

Abstract: Disclosed herein are solid state illumination systems which provide improved color quality and/or color contrast. The systems provide total light having delta chroma values for each of the fifteen color samples of the color quality scale that are preselected to provide enhanced color contrast relative to an incandescent or blackbody light source, in accordance with specified values which depend on color temperature. Illumination systems provided herein may comprise one or more organic electroluminescent element, or they may comprise a plurality of inorganic light emitting diodes, wherein at least two inorganic light emitting diodes have different color emission bands. Methods for the manufacture of illumination systems having improved color quality and/or color contrast are also provided.

Abstract: The instant application describes a red phosphor material including Y(Px, V1-x)O4:Eu, wherein a value of x is equal to or greater than 0.3 and equal to or less than 0.8.

Abstract: Disclosed herein is a group of phosphors of the formula M2(SiO4)1-x-y-z(TiO4)x(ZrO4)y(HfO4)z:A,S and light emitting devices which utilize these phosphors.

Abstract: A gas discharge device with one or more gas filled Plasma-tubes on or within a rigid, flexible, or semi-flexible substrate with each Plasma-tube being electrically connected to one or more electrical conductors such as electrodes. In one embodiment, each Plasma-tube is made of one or more luminescent substances with the exterior of each tube containing one or more luminescent substances. The Plasma-tubes may be used alone or in combination with Plasma-shells.

Abstract: A phosphor includes Eu-activated YVO4:Eu doped Pith 10 ppm to 3,000 ppm of Tb and/or 50 ppm to 4,500 ppm of Sm. The luminance of light emitted by ultraviolet excitation is higher than that of undoped YVO4:Eu.

Abstract: A low-pressure discharge lamp includes a discharge vessel, a gas discharge medium including nitrogen contained in the discharge vessel at low pressure, wherein the discharge lamp is configured such that light may be generated by a high-current discharge process of the gas discharge medium.

Abstract: A light-emitting device is produced using a phosphor composition containing a phosphor host having as a main component a composition represented by a composition formula: aM3N2.bAlN.cSi3N4, where “M” is at least one element selected from the group consisting of Mg, Ca, Sr, Ba, and Zn, and “a”, “b”, and “c” are numerical values satisfying 0.2?a/(a+b)?0.95, 0.05?b/(b+c)?0.8, and 0.4?c/(c+a)?0.95. This enables a light-emitting device emitting white light and satisfying both a high color rendering property and a high luminous flux to be provided.

Abstract: A plasma display panel includes a front plate, a rear plate facing the front plate, and a phosphor layer formed on the rear plate. The phosphor layer includes a green phosphor layer containing Zn2SiO4:Mn and (Y1?X, GdX)3Al5O12:Ce, where 0?X?1. In Zn2SiO4:Mn, the amount of Mn is no less than 8 at. % to no more than 10 at. % relative to the total amount of Zn and Mn, and the total amount of Zn and Mn is no less than 197 at. % to no more than 202 at. % relative to the amount of Si. The amount of (Y1?X, GdX)3Al5O12:Ce is no less than 20 wt. % to no more than 50 wt. % relative to the total amount of Zn2SiO4:Mn and (Y1?X, GdX)3A15O12:Ce.

Abstract: An oxide phosphor that is highly durable and produces visible light when excited by exposure to near-ultraviolet excitation light, comprising an oxide having the composition represented by the formula (Al2O3)x.(SiO2)1-x, where 0<x<1, and an activating element M.

Abstract: In a method of fabricating a planar light source, a first substrate is formed at first. First electrodes approximately parallel to each other are formed on the first substrate. Sets of first dielectric patterns are formed on the first substrate. Each set of the first dielectric patterns includes at least two first striped dielectric patterns, and each of the first striped dielectric patterns covers one of the first electrodes correspondingly. The edges of the top of each first striped dielectric pattern are raised in a peak shape. A phosphor layer is formed between the first striped dielectric patterns of each set of the first dielectric patterns. A second substrate is formed. The first and second substrates are bound; meanwhile, a discharge gas is injected into the discharge space.

Abstract: A display apparatus is provided. The display apparatus includes a light source apparatus including a white light source, a blue fluorescent material, a green fluorescent material, a red fluorescent material, a green color filter, and a red color filter. A green chromaticity point of an output of green light to be omitted from the green fluorescent material and a red chromaticity point of an output of red light to be emitted from the red fluorescent material on a chromaticity coordinate system are interconnected by an imaginary straight line which passes only points which are equal to or higher than (0.300, 0.600) with regard to at least one of an x-axis component and a y-axis component of the chromaticity coordinate system.

Abstract: A phosphor which emits light having high brightness, serves as an excellent orange or red phosphor whose light brightness is less decreased when exposed to an excitation source contains a crystal phase having the chemical composition expressed by the general formula [1]: (1?a?b)(Ln?pMII?1?pMIII?MIV?N3).a(MIV?(3n+2)/4NnO).b(AMIV?2N3)??[1] wherein Ln? represents a metal element selected from the group consisting of lanthanoids, Mn, and Ti; MnII? represents a divalent metal element except the Ln? element; MIII? represents a trivalent metal element; MIV? represents a tetravalent metal element; A represents a metal element selected from the group consisting of Li, Na, and K; 0<p?0.2; 0?a, 0?b, a+b>0, 0?n, and 0.002?(3n+2)a/4?0.9.

Abstract: Disclosed herein are phosphor compositions which can exhibit a broad emission spectrum and improved color rendering index (CRI) relative to conventional phosphor materials. The phosphor compositions may, in some embodiments, be represented by the Formula I: (RE2?x+yCexAk1?y)(MG4?z?rSirMnz)(Si1?ePe)O12?rNr, wherein RE comprises at least one rare earth metal; Ak comprises at least one alkaline earth metal; MG comprises at least one main group element; x is greater than 0 and less than or equal to 0.2; y is less than 1; z is greater than 0 and less than or equal to 0.8; e is about 0 or less than or equal to 0.16; r is about 0 or less than or equal to 1; and z is about the sum of e and y. Also disclosed herein are lighting apparatuses including the phosphor compositions, as well as methods of making and using the phosphor compositions.

Abstract: According to the present invention, a fluorescent powder composed mainly of an acicular or fibrous zinc oxide single crystal with an aspect ratio of 5 or higher is produced by the following steps: a step of producing a raw material solution selected from the group consisting of a raw material solution (A) that is an alkali solution containing zing ions, a raw material solution (B) that is a solution containing zinc ions and ions of dopant element, and a mixed solution of the raw material solution (A) and the raw material solution (B); and a hydrothermal reaction step wherein a hydrothermal reaction of the mixed solution is carried out in a hermetically sealed vessel at a subcritical or supercritical temperature and at a subcritical or supercritical pressure. A zinc oxide single crystal powder can be produced at low cost without the need for a pulverization step or a similar step and high-density orientation can be realized by such crystal powder.

Abstract: A light-emitting device is produced using a phosphor composition containing a phosphor host having as a main component a composition represented by a composition formula: aM3N2.bAlN.cSi3N4, where “M” is at least one element selected from the group consisting of Mg, Ca, Sr, Ba, and Zn, and “a”, “b”, and “c” are numerical values satisfying 0.2?a/(a+b)?0.95, 0.05?b/(b+c)?0.8, and 0.4?c/(c+a)?0.95. This enables a light-emitting device emitting white light and satisfying both a high color rendering property and a high luminous flux to be provided.