Kuraray Co., Ltd.

Hiroshima University

Jun Takai

Hideharu Iwasaki

Yasutaka Inubushi

Masakazu Nakaya

Ryoichi Sasaki

Kikuo Okuyama

Yoshihisa Tsuji

Masahiko Ota

Yasushi Morihara

Kikuo Arimoto

Ferry Iskandar

Kazuma Inoue

Akihiro Yabuki

Yutaka Kaihatsu

Takashi Ogi

Ferry Iskanda

An M-C&#x2014;N&#x2014;O based phosphor including a group IIIB element (M), carbon (C), nitrogen (O), wherein an amount of the group IIIB element (M) contained is 1%&#x3c;(M)&#x3c;50% by mass, an amount of carbon (C) contained is 0.005%&#x3c;(C)&#x3c;10% by mass, an amount of nitrogen (N) contained is 1%&#x3c;(N)&#x3c;60% by mass, an amount of oxygen (O) contained is 1%&#x3c;(O)&#x3c;75% by mass, and (M)+(C)+(N)+(O)=100% by mass. Colors of the M-C&#x2014;N&#x2014;O based phosphor can be changed by adjusting a peak top of an emission spectrum. Highly environmentally-compatible polymer dispersions, inorganic EL devices, light emitting devices, fluorescent tubes, and the like are also provided, which use the M-C&#x2014;N&#x2014;O based phosphors.

M-C-N-O based phosphor

The present invention provides an Al&#x2014;C&#x2014;O based phosphor using neither heavy metal nor rare metal and composed of elements with high environmental compatibility and excellent economic efficiency, wherein the wavelength of the peak intensity of the emission spectrum can be changed without changing the basic composition. An aluminum oxide phosphor which comprises aluminum (Al), carbon (C), and oxygen (O) respectively in an amount of 30 mol %&#x3c;Al&#x3c;60 mol %, 0 mol %&#x3c;C&#x3c;10 mol %, 30 mol %&#x3c;O&#x3c;70 mol % is provided. The above problem is solved in the production of an Al&#x2014;C&#x2014;O phosphor comprising aluminum (Al), carbon (C), and oxygen (O) by heating and firing a mixture comprising an aluminum-containing compound and a coordinatable oxygen-containing compound.

Aluminum oxide phosphor and method for producing the same

A method of producing an M-C-N-O based phosphor with reduced non-uniform emission and improved color purity is provided. The method of producing an M-C-N-O based phosphor comprising a group IIIB element (M), carbon (C), nitrogen (N) and oxygen (O) comprises: heating a mixture comprising a group IIIB element-containing compound and a nitrogen-containing organic compound to form a pyrolysate; disintegrating the resulting pyrolysate-containing product; and firing the disintegrated product.

Method of producing M-C-N-O based phosphor

The present invention provides a method for producing a zinc sulfide based phosphor by firing a zinc sulfide based precursor, comprising at least: a first firing step and a second firing step. Use of the method of the present invention makes it possible to provide a zinc sulfide based phosphor material suitable in the production of an EL device that shows high brightness.

Method for producing zinc sulfide based phosphor

An iridium-containing group II-VI compound phosphor capable of efficiently emitting light without any economical problems or problems in energy efficiency or color purity is provided. A method for producing the phosphor is also provided. The phosphor comprises iridium and a group II-VI compound semiconductor, and the iridium is uniformly dispersed in surfaces of phosphor particles and in an inside of the phosphor particles. The method for producing the iridium-containing phosphor comprises firing an inorganic composition containing a group II-VI compound semiconductor and an iridium compound, and an iridium complex salt is used as the iridium compound.

Iridium-containing phosphor and method for producing the same

A process for producing a Group II metal sulfide phosphor precursor, comprising adding to an organic solvent an aqueous solution containing at least one of a Group II element compound, a sulfurizing agent, and a compound containing any of copper, silver, manganese, gold, and rare-earth elements to obtain a reaction mixture, heating the reaction mixture to produce an azeotrope of the water and the organic solvent, and removing water from the reaction mixture to produce a desired Group II metal sulfide in the reaction mixture, wherein the removal of water from the reaction mixture occurs by recovering only the water condensed from a vapor produced by the azeotropic distillation.

Group II metal sulfide phosphor precursor and method for producing phosphor

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Kurashiki, Japan

Jun Takai