Mitsubishi Chemical Corporation

National Institute for Materials Science

Nichia Corporation

Citizen Electronics Co., Ltd.

Independent Administrative Institution National Institute for Materials Science

National Research and Development Agency National Institute for Materials Science

Kyota Ueda

Naoto Hirosaki

Hajime Yamamoto

Ken Sakuma

Naoto Kijima

Tomoyuki Kurushima

Masayoshi Mikami

Hiroyuki Imura

Satoshi Shimooka

Kentaro Horibe

Atsushi Ooishi

A phosphor includes a crystal phase having a composition represented by ReMAMBMCDX, in which MA includes at least one of Ca, Sr, Ba, Na, K, Y, Gd, or La, MB includes at least one of Li, Mg, or Zn, MC includes at least one of Al, Si, Ga, In, or Sc, D is N (nitrogen) and/or O (oxygen), X includes at least one of F, Cl, Br, or I, Re includes at least one of Eu, Ce, Pr, Tb, or Dy, and a, b, c, d, e, and x satisfy the specific expressions, respectively. In the phosphor, when a content of B (boron) is designated as b (mass ppm), a value of Log(b) is 3.5 or less.

Phosphor, light-emitting device, illumination device, image display device, and indicator lamp for vehicle

Phosphors include a CaAlSiNfamily crystal phase, wherein the CaAlSiNfamily crystal phase comprises at least one element selected from the group consisting of Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm, and Yb.

Phosphor and light-emitting equipment using phosphor

An object of the present invention is to provide an inorganic phosphor having fluorescence properties emitting an orange or red light which has a longer wavelength as compared with the cases of conventional sialon phosphors activated with a rare earth. The invention relates to a design of white light-emitting diode rich in a red component and having good color-rendering properties by employing a solid solution crystal phase phosphor which uses as a host crystal an inorganic compound having the same crystal structure as that of a CaSiAlNcrystal phase and to which M (wherein M is one or two or more elements selected from the group consisting of Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm, and Yb) is added as an emission center.

A bullet type light emitting diode lamp or a chip-type light emitting diode lamp includes a semiconductor light emitting element, and a plurality of fluorescent materials that absorb part or whole of light emitted from the semiconductor light emitting element, and emit fluorescence at a wavelength different from that of the absorbed light. The fluorescent materials include a phosphor of a CaAlSiNcrystalline phase.

Light emitting diode lamp and light emitting device

To provide a green phosphor with high conversion efficiency of blue of near-ultraviolet light and excellent color purity, a multinary oxynitride phosphor represented by the general formula [I] is proposed.M1BaM2LON&#x2003;&#x2003;[I]In the formula [I], Mrepresents Cr, Mn, Fe, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm and Yb, Mrepresents Sr, Ca, Mg and Zn, L represents metal elements belonging to the fourth group or the fourteenth group of the periodic table, and x, y, z, u, v and w are the numeric values in the following ranges:0.00001&#x2266;&#x2266;30&#x2266;&#x2266;2.999992.6&#x2266;&#x2266;30&#x3c;&#x2266;116&#x3c;&#x2266;250&#x3c;&#x2266;17.

Multinary oxynitride phosphor, and light emitting device, image display, illuminating device and phosphor-containing composition using the same, and multinary oxynitride

The present invention provides a white light emitting diode for emitting white light with warmness at a higher luminance, and an intermediate color light emitting diode satisfying light emission with diversified color tones at a higher luminance. A fluorescent material which emits yellowish red or red light and has a CaAlSiNcrystal phase including, dissolved therein in a solid state, one or more element(s) selected from Mn, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu. The fluorescent material is mixed with another fluorescent material emitting green, yellowish green, or yellow light, and the mixed phosphor is combined with a semiconductor light emitting element for emitting bluish purple or blue light, to fabricate a white light emitting diode which efficiently emits a warm white light with a high efficiency.

Growing community of inventors

Yokohama, Japan

Kyota Ueda