Mitsubishi Chemical Corporation

Samsung Electronics Co., Ltd.

Research Association for Utilization of Light Oil

Independent Administrative Institution National Institute for Materials Science

Takatoshi Seto

Naoto Kijima

Makoto Imanari

Naoto Hirosaki

Hiroshi Iwane

Masahiko Yoshino

Keiichi Seki

Takuya Kitabatake

Dohoon Kim

Akira Ohno

Takamasa Izawa

Kazuhiko Kagawa

Yoshihito Satou

Fusaki Fujibayashi

Ryuji Adachi

Hiroko Endo

Masahide Yamada

Hiroaki Sakuta

Hiroyasu Yamada

Tatsuya Inoue

Motoyuki Shigeiwa

Takashi Yokoi

Masayoshi Mikami

Hiroyuki Imura

Masaki Odagiri

Katsufumi Kuzira

Katsuhumi Kuzira

Disclosed is a phosphor including at least one of a nitride and an oxynitride, wherein the nitride and the oxynitride contain an alkaline-earth metal element, silicon, and an activator element. wherein the phosphor has a volume average particle diameter of greater than or equal to about 50 nm and less than or equal to about 400 nm and an inner quantum efficiency of greater than or equal to about 60% at an excitation wavelength of about 450 nm. The method of preparing a phosphor includes a precursor preparation process of preparing a phosphor precursor particles including a silicon nitride particles, a compound containing an alkaline-earth metal element, and a compound containing an activator element, wherein the compound containing an alkaline-earth metal element and the compound containing an activator element are deposited on the surface of the silicon nitride particles; and a firing process of firing the phosphor precursor particles.

Semiconductor package with improved signal stability and method of manufacturing the same

A yellow phosphor is provided. The yellow phosphor includes a crystal formed of a compound that is represented by the following formula (1): Ln(EuM)SiAlON(0.5&#x2266;x&#x2266;3, 0&#x3c;z&#x3c;0.3, 0&#x3c;y&#x2266;4) (1), wherein Ln includes at least one rare earth element, and M includes at least one selected from calcium (Ca), barium (Ba), strontium (Sr), and magnesium (Mg).

Phosphor and light-emitting device including the same

A magenta toner for developing electrostatic latent images, wherein the magenta toner includes a magenta toner particle having a polymer binder and a colorant, wherein the colorant includes a magenta pigment or dye and a visible light-excitable nitride fluorescent substance.

Magenta toner for developing electrostatic latent images

To provide a new phosphor of which fluorescence contains much red light component and has a large full width at half maximum, the crystal phase represented by the formula [I] is included in the phosphor.RMASiAlON&#x2003;&#x2003;[I](R represents La, Gd, Lu, Y and/or Sc, M represents Ce, Eu, Mn, Yb, Pr and/or Tb, A represents Ba, Sr, Ca, Mg and/or Zn, and x, y, z, w1 and w2 are the numeric values in the following ranges:(1/7)&#x2266;(3&#x2212;2)/6&#x3c;(1/2),0&#x3c;(1.52)/6&#x3c;(9/2),0&#x3c;&#x3c;3,0&#x2266;&#x3c;2,0&#x3c;&#x3c;1,0&#x2266;1&#x2266;5,0&#x2266;2&#x2266;5, and0&#x2266;1+2&#x2266;5).

Phosphor and production method thereof, phosphor-containing composition, light emitting device, illuminating device, display, and nitrogen-containing compound

A phosphor includes a crystal phase of a formula (Ln,Ca,Ce)SiN. In this formula, &#x3b1; is from &#x2212;0.1 to 1.5, inclusive. When an object color of the phosphor is expressed by the L*a*b* color system, the value of (a*+b*)satisfies 71&#x2266;(a*+b*). Also in the formula, Ln is La, Gd, Lu, Y, Sc, or any combination of these. When the phosphor is excited with light having a wavelength of 455 nm, it emits a color wherein x is from 0.400 to 0.570 inclusive, and y is from 0.420 to 0.590, inclusive, as expressed in the CIE standard coordinate system.

Phosphor, method for producing phosphor, phosphor-containing composition, light-emitting device, lighting system and image display device

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&#x2212;)(Ln'MMMN).(MNO).(AMN)&#x2003;&#x2003;[1]

Phosphor and use thereof

To provide a yellow to orange phosphor which has high luminance and excellent temperature characteristics and which also has high luminance when mixed with a phosphor of a different color. A phosphor containing a crystal phase represented by the following formula [I], wherein when its object color is expressed by the L*a*b* color system, the values of a*, b* and (a*+b*)satisfy &#x2212;20&#x2266;a*&#x2266;&#x2212;2, 71&#x2266;b* and 71&#x2266;(a*+b*), respectively:RMASiAlON&#x2003;&#x2003;[I].

To provide a new phosphor of which fluorescence contains much red light component and has a large full width at half maximum, the crystal phase represented by the formula [I] is included in the phosphor.RMASiAlON&#x2003;&#x2003;[I](R represents La, Gd, Lu, Y and/or Sc, M represents Ce, Eu, Mn, Yb, Pr and/or Tb, A represents Ba, Sr, Ca, Mg and/or Zn, and x, y, z, w1 and w2 are the numeric values in the following ranges:( 1/7)&#x2266;(32)/6&#x3c;(&#xbd;),0&#x3c;(1.52)/6&#x3c;(9/2),0&#x3c;x&#x3c;3,0&#x2266;y&#x3c;2,0&#x3c;z&#x3c;1,0&#x2266;w1&#x2266;5,0&#x2266;w2&#x2266;5, and012&#x2266;5)

An object of the present invention is to provide a high-efficiency red light emitting phosphor and white light emitting phosphor for using in a display or lighting which high-efficiently emits light in combination with a light source which emits light in the region from near-ultraviolet light to visible light. The present invention relates to a phosphor having a crystal phase having a specified chemical composition.

Phosphor and including the same, light emitting apparatus, illuminating apparatus and image display

An object of the present invention is to provide a light emitting device having a high emission intensity, and a light emitting device having a high emission intensity and a good color rendering property. The present invention provides a light emitting device which comprises:

Light emitting device and illuminator using the same

There is disclosed a process for preparing glycol aldehyde from ethylene glycol by use of a complex system catalyst comprising copper and other inorganic component, which comprises permitting 0.001 to 0.3 mole of oxygen per one mole of ethylene glycol to be copresent in the reaction system.

Process for preparing glycol aldehyde

A process for producing an indole by catalytic reaction of a 2-(o-aminoaryl)ethanol, said reaction being carried out by heating in a liquid phase in the presence of an alkali metal using a catalyst containing a metal selected from the group consisting of a platinum-group metal, nickel and copper. The process is industrially advantageous in that indoles are produced in high yield.

Process for producing indoles

A process for preparing indoles in high yield by reacting anilines and 1,2-glycols in a liquid phase in the presence of a cadmium bromide or iodide/potassium bromide or iodide catalyst. The used catalyst can be easily recovered and when reused, exhibits excellent performance.

Growing community of inventors

Yokohama, Japan

Takatoshi Seto