Kuraray Co., Ltd.

Hiroshima University

Ferry Iskandar

Hideharu Iwasaki

Kikuo Okuyama

Jun Takai

Akihiro Yabuki

Takashi Ogi

Yutaka Kaihatsu

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

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Higashihiroshima, Japan

Ferry Iskandar