Abstract:
The present invention provides an efficient red fluorescent material and a method for producing the same, provides a white light source and an illuminating device each of which uses this red fluorescent material to achieve snow-white lighting, and furthermore provides a liquid crystal display having excellent color reproduction. The red fluorescent material contains an element A, europium, silicon, carbon, oxygen, and nitrogen, at an atomic ratio of the following composition formula (1), and, in a Photo Luminescence Excitation spectrum of the red fluorescent material, a relative value of a luminescence intensity of 550 nm excitation wavelength when a luminescence intensity of 400 nm excitation wavelength is defined as 1 is not more than 0.85 and not less than 0.55. [A(m-x)Eux][Si(9-y)Cy]OnN[12-2(n-m)/3] wherein element A is at least one selected from the group consisting of magnesium, calcium, strontium, and barium; and m, x, y, and n satisfy 3
Abstract:
A family of oxycarbonitride phosphor compositions is provided. Also provided are light emitting devices incorporating the oxycarbonitride phosphor compositions.
Abstract:
An oxynitride phosphor powder contains α-SiAlON and aluminum nitride, obtained by mixing a silicon source, an aluminum source, a calcium source, and a europium source to produce a composition represented by a compositional formula: Cax1Eux2Si12-(y+z)Al(y+z)OzN16-z (wherein x1, x2, y and z are 0
Abstract translation:氧氮化物荧光体粉末含有通过混合硅源,铝源,钙源和铕源而得到的α-SiAlON和氮化铝,以制备由组成式Cax1Eux2Si12-(y + z)Al( y + z)OzN16-z(其中x1,x2,y和z分别为0
Abstract:
There is provided a phosphor blend for an LED light source comprising from about 25 to about 35 weight percent of a cerium-activated yttrium aluminum garnet phosphor, from about 5 to about 10 weight percent of a europium-activated strontium calcium silicon nitride phosphor, and from about 50 to about 75 weight percent of a europium-activated calcium magnesium chlorosilicate phosphor. An LED light source in accordance with this invention has a B:G:R ratio for a 5500 K daylight balanced color film of X:Y:Z when directly exposed through a nominal photographic lens, wherein X, Y and Z each have a value from 0.90 to 1.10.
Abstract:
An Li-containing α-sialon-based phosphor represented by the formula (1): LixEuySi12−(m+n)Al(m+n)On+δN16−n−δ (wherein assuming that average valence of Eu is a, x+ya+δ=m; 0.455≦x 0).
Abstract translation:由式(1)表示的含锂的α-赛隆系荧光体:LixEuySi12-(m + n)Al(m + n)On +δN16-n-δ(其中,假设Eu的平均价为a,x + ya +δ= m; 0.455&nlE; x <1.2,0.001和nlE; y&nlE; 0.2,0.9&amp; nlE; m&nlE; 2.5,0.5&nlE; n&nlE; 2.4和δ> 0)。
Abstract:
A compound is provided containing silicon, aluminum, strontium, europium, nitrogen, and oxygen is used that enables a red phosphor having strong luminous intensity and high luminance to be obtained, and that enables the color gamut of a white LED to be increased with the use of the red phosphor. The red phosphor contains an element A, curopium, silicon, aluminum, oxygen, and nitrogen at the atom number ratio of the following formula: [A(m-x)Eux]Si9AlyOnN[12+y-2(n-m)/3]. The element A in the formula is at least one of magnesium, calcium, strontium, and barium, and m, x, y, and n in the formula satisfy the relations 3
Abstract:
There are provided a phosphor which is a divalent europium-activated oxynitride phosphor substantially represented by General formula (A): EuaSibAlcOdNe, a divalent europium-activated oxynitride phosphor substantially represented by General formula (B): MIfEugSihAlkOmNn or a divalent europium-activated nitride phosphor substantially represented by General formula (C): (MII1-pEup)MIIISiN3, having a reflectance of light emission in a longer wavelength region of visible light than a peak wavelength of 95% or larger, and a method of producing such phosphor; a nitride phosphor and an oxynitride phosphor which emit light efficiently and stably by the light having a wavelength ranging from 430 to 480 nm from a semiconductor light emitting device by means of a light emitting apparatus using such phosphor, and a producing method of such phosphor; and a light emitting apparatus having stable characteristics and realizing high efficiency.
Abstract:
A phosphor composition is provided. The phosphor composition comprises a phosphor nucleus and a hydrophobic layer. The hydrophobic layer is bonded on a surface of the phosphor nucleus and consists of an organic compound with a hydrophobic functional group.
Abstract:
The present invention provides a fluorescent substance excellent both in quantum efficiency and in temperature characteristics, and also provides a light-emitting device utilizing the fluorescent substance. This fluorescent substance contains an inorganic compound comprising a metal element M, a trivalent element M1 other than the metal element M, a tetravalent element M2 other than the metal element M, and either or both of O and N. In the inorganic compound, the metal element M is partly replaced with a luminescence center element R. The crystal structure of the fluorescent substance is basically the same as Sr3Al3Si13O2N21, but the chemical bond lengths of M1-N and M2-N are within the range of ±15% based on those of Al—N and Si—N calculated from the lattice constants and atomic coordinates of Sr3Al3Si13O2N21, respectively. The fluorescent substance emits luminescence having a peak in the range of 490 to 580 nm when excited with light of 250 to 500 nm.
Abstract translation:本发明提供了量子效率和温度特性都优异的荧光物质,并且还提供了利用荧光物质的发光装置。 该荧光物质含有包含金属元素M,金属元素M以外的三价元素M1,金属元素M以外的四价元素M2,O和N中的任一种或两者的无机化合物。在无机化合物中, 金属元素M部分地被发光中心元件R替代。荧光物质的晶体结构基本上与Sr 3 Al 3 Si 13 O 2 N 21相同,但M1-N和M2-N的化学键长度在±15%的范围内基于 分别由Sr3Al3Si13O2N21的晶格常数和原子坐标计算Al-N和Si-N。 当用250〜500nm的光激发时,荧光物质发射具有在490〜580nm范围内的峰值的发光。
Abstract:
A light-emitting device includes a light-emitting element for emitting primary light, and a wavelength conversion unit for absorbing part of the primary light and emitting secondary light having a wavelength longer than that of the primary light, wherein the wavelength conversion unit includes plural kinds of phosphors having light absorption characteristics different from each other, and then at least one kind of phosphor among the plural kinds of phosphors has an absorption characteristic that can absorb the secondary light emitted from at least another kind of phosphor among the plural kinds of phosphors.