Abstract:
A light emitting device includes a board and a light emitting element mounted on the board, emitting light having a wavelength of 250 nm to 500 nm. A red fluorescent layer is formed on the element and includes a red phosphor (M1−x1Eux1)aSibAlOcNd having a semicircular shape with a radius r, where M is an element that is selected from IA group elements, IIA group elements, IIIA group elements, IIIB group elements except Aluminum, rare-earth elements, and IVB group elements. An intermediate layer is formed on the red fluorescent layer, being made of transparent resin, having a semicircular shape with a radius D; and a green fluorescent layer is formed on the intermediate layer, including a green phosphor, having a semicircular shape. A relationship between the radius r and the radius D is 2.0r(μm)≦D≦(r+1000)(μm).
Abstract:
A wavelength conversion particle 7 used for a wavelength conversion member 70 is provided with a moth-eye structure section 74 having a fine concavo-convex structure in the side of a surface of a fluorescent particle 71, and the fine concavo-convex structure is formed in fluorescent particle 71 itself. Wavelength conversion member 70 is formed by dispersing wave-length conversion particle(s) 7 into a translucent medium 73 having a smaller refraction index than fluorescent particle 71 of wavelength conver-sion particle 7. Wavelength conversion member 70 is further provided with an antireflection section 76 in the side of the surface of fluorescent particle 71. Antireflection section 76 comprises moth-eye structure section 74 and translucent medium 73 entered between taper-shaped fine projections 75 of moth-eye structure section 74. In a light emitting device 1, wavelength conversion member 70 is used as a color conversion member converting a part of light emitted from a LED chip 10 into light having a longer wave-length than the light emitted from LED chip 10 and emitting the converted light.
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 translation:使用含有以组成式aM3N2.bAlN.cSi3N4为代表的成分为主成分的荧光体主体的荧光体组合物制造发光元件,其中,M为选自Mg,Ca ,Sr,Ba和Zn,a,b和c分别是满足0.2≦̸ a /(a + b)≦̸ 0.95,0.05& nlE; b /(b + c)≦̸ 0.8,0.4& ; c /(c + a)≦̸ 0.95。 这使得能够提供发出白光的发光装置,同时满足高显色性和高光通量。
Abstract:
Provided is a fluorescent substance excellent in quantum efficiency and in temperature characteristics, and 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:提供了量子效率和温度特性优异的荧光物质,以及利用该荧光物质的发光元件。 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 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:
The present invention provides a fluorescent substance excellent both in quantum efficiency and in temperature characteristics, and also provides a process for producing the fluorescent substance. This fluorescent substance is an oxynitride phosphor having a low paramagnetic defect density and comprising aluminum, silicon, either or both of oxygen and nitrogen, and a metal element M, provided that the metal element M is partly replaced with an emission center element R. That phosphor can be produced by the steps of: subjecting a mixture of starting materials to heat treatment under a nitrogen atmosphere so as to obtain an intermediate fired product, and then further subjecting the intermediate fired product to heat treatment under an atmosphere of nitrogen-hydrogen mixed gas.
Abstract:
To provide a phosphor having a broad emission spectrum in a range of blue color (in a peak wavelength range from 400 nm to 500 nm), having a broad flat excitation band in a near ultraviolet/ultraviolet range, and having excellent emission efficiency and emission intensity/luminance. The phosphor is given as a general composition formula expressed by MmAaBbOoNn:Z, (where element M is the element having bivalent valency, element A is the element having tervalent valency, element B is the element having tetravalent valency, O is oxygen, N is nitrogen, and element Z is more than one kind of element acting as an activator), satisfying 5.0
Abstract translation:为了提供在近紫外/紫外线范围内具有宽平坦激发带的蓝色(峰值波长范围为400nm〜500nm)中具有宽发光光谱的荧光体,并且具有优异的发光效率和发射 强度/亮度。 荧光体以由MmAaBbOoNn:Z表示的一般组成式给出,其中元素M是具有二价化合价的元素,元素A是具有三价价态的元素,元素B是具有四价化合价的元素,O是氧,N是 氮和元素Z是作为活化剂的多种元素),满足5.0 <(a + b)/ m <9.0,0和nlE; a / m&nlE; 2.0,0和nlE; o&nlE; n,n = 2 / 3m + a + 4 / 3b-2 / 3o,并且在波长范围为250nm〜430nm的光的激发下具有在400nm〜500nm的波长范围内具有最大峰值的发射光谱。
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; 0.45≦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; 0.45&nlE; x <1.2,0.001和nlE; y&nlE; 0.2,0.9&amp; nlE; m&lt; EL; 2.5,0.5&amp; nlE; n&lt; l; 2.4和δ> 0)。
Abstract:
The present invention provides a reliable, long-life phosphor, or the like, which is prevented from darkening due to aging. A light emitting apparatus has a light emitting element and a phosphor layer. The phosphor layer has a phosphor excited by light from the light emitting element, and a binder which binds the phosphor. The binder is hydroxide oxide gel obtained by curing sol of a hydroxide oxide mixed with sol containing at least one metallic element selected from the group consisting of Al, Y, Gd, Lu, Sc, Ga, In, and B. Transmittance of hydroxide oxide in a gel state is higher than the transmittance in the polycrystal state where the sol-gel reaction is proceeded. In addition, the content of hydroxyl group or water of crystallization in the hydroxide oxide is 10% or less by weight.