Abstract:
A red phosphor of high efficiency and a method for producing it are provided. A white light source and an illumination device that allow illumination with the pure white color using the red phosphor are also provided. In addition, a liquid crystal display device using the red phosphor and exhibiting good color reproducing performance is provided. The red phosphor contains an element A, europium (Eu), silicon (Si), carbon (C), oxygen (O) and nitrogen (N) in the ratios of the numbers of atoms of the following compositional formula (1): [Chemical Formula 1] [A(m-x)EUx][Si(9-y)Cy]OnN[12-2(n-m)/3] compositional formula (1) where the element A is at least one of magnesium (Mg), calcium (Ca), strontium (Sr) and barium (Ba), and where m, x and n in the compositional formula (1) satisfy the relationships of 3
Abstract:
An optoelectronic component includes a layer sequence having an active region that emits primary electromagnetic radiation, wherein the primary electromagnetic radiation has a wavelength of 430 nm to 470 nm, a conversion material arranged in a beam path of the primary electromagnetic radiation and at least partly converts the primary electromagnetic radiation into a secondary electromagnetic radiation, wherein the conversion material includes a first phosphor having general composition A3B5O12, wherein A is a combination of Lu and Ce, and wherein B is a combination of Al and Ga.
Abstract:
Disclosed herein is a novel family of oxycarbonitride phosphor compositions and light emitting devices incorporating the same. Within the sextant system of M—Al—Si—O—N—C—Ln and quintuplet system of M—Si—O—N—C—Ln (M=alkaline earth element, Ln=rare earth element), the phosphors are composed of either one single crystalline phase or two crystalline phases with high chemical and thermal stability. In certain embodiments, the disclosed phosphor of silicon oxycarbonitrides emits green light at wavelength between 530-550 nm. In further embodiments, the disclosed phosphor compositions emit blue-green to yellow light in a wavelength range of 450-650 nm under near-UV and blue light excitation.
Abstract:
The present disclosure provides an illuminating system including a light emitting diode (LED); and a tunable luminescent material disposed approximate the light-emitting diode, wherein the tunable luminescent material includes alkaline earth metal (AE) and silicon aluminum nitride doped by a rare earth element (RE), formulated as (AE)Si6−pAlpN8, wherein p is a parameter defining a relative aluminum content in weight and p is greater than zero.
Abstract:
A phosphor and a light emitting device including the phosphor may be provided that emits light having a peak wavelength between a green wavelength band and a yellow wavelength band and has a triclinic system crystal structure of which the chemical formula is MSi2N2O2, M═CaxSryEuz(x+y+z=1), wherein, when three sides of a unit crystal lattice of the crystal structure are a, b and c and corner angles are α, β and γ, the crystal structure has relationships of a≠b≠c and α≠β≠γ, and wherein, in a, b and c, any one of them is more than twice as much as one of the other two, and the values of the other two are so similar that they do not exceed the double of each.
Abstract translation:可以提供一种荧光体和包括该荧光体的发光器件,其发射具有绿色波长带和黄色波长带之间的峰值波长的光,并且具有其化学式为MSi2N2O2,M=CaxSryEuz(x)的三斜晶系晶体结构 + y + z = 1),其中,当晶体结构的单晶晶格的三边为a,b和c,角角为α,&bgr; 和γ,晶体结构具有≠b≠c和α≠&bgr;≠γ的关系,并且其中,在a,b和c中,其中任何一个都是其他两个之一的两倍以上,以及 其他两个的值是相似的,它们不超过每个的两倍。
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:
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): (MIIl-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 method for producing a sialon phosphor is provided. The method includes mixing a silicon precursor and an aluminum precursor and sintering the mixture to form a first sintered body. The first sintered body and a precursor for an active material are mixed and the mixture is heat-treated to form a second sintered body. That is, the exemplary method for producing a sialon phosphor involves firstly forming the first sintered body serving as a host material to stably ensure a crystal structure, and then mixing the active material and the first sintered body so as to preserve the role of the active material without sacrificing the crystal structure of the first sintered body.
Abstract:
A method for producing a radiation conversion element is provided, in which a solution is applied to a substrate, a gel is formed from the solution and the gel is thermally treated. A radiation conversion element is also provided which is produced according to the method. An optoelectronic component is also provided which contains a radiation conversion element.