Kyulux, Inc.

Denka Company Limited

Ryosuke Kondo

Chihaya Adachi

Takuma Yasuda

Hideyuki Emoto

Masayoshi Ichikawa

Hiroko Nomura

Hajime Nakanotani

Katsuyuki Shizu

Kenichi Goushi

Inseob Park

Masaki Numata

Jun-Yun Kim

Hiroki Uoyama

Motoi Tanaka

Junichi Nishide

Jyunichi Nishide

Provided is a fluoride phosphor that has a good external quantum efficiency and is suitable for stably producing white LEDs. The fluoride phosphor has a composition represented by a general formula (1) and a repose angle of 30&#xb0; or more and 60&#xb0; or less. general formula: AMF:Mn(1), wherein 0&#x3c;n&#x2264;0.1, the element A is one or more alkali metal elements including at least K, and the element M is a simple substance of Si, a simple substance of Ge, or a combination of Si and one or more elements selected from the group consisting of Ge, Sn, Ti, Zr, and Hf.

Fluoride phosphor and light-emitting device using same

The purpose of the present invention is to provide a fluoride phosphor (represented by the general formula ASiF:Mn) having high luminescence intensity and reliability, a high-luminance light-emitting device using this phosphor, and a production method for this phosphor. The production method for a fluoride phosphor represented by the general formula ASiF:Mn (where element A is an alkali metal element including at least potassium), wherein the fluoride phosphor production method comprises: a step of preparing an aqueous solution wherein element A and fluorine are dissolved in a solvent; and a step of adding, to the aqueous solution, solid silicon dioxide and a manganese compound that supplies manganese having a valence other than +7; wherein an added amount of the manganese compound is within a range such that an Mn content in the fluoride phosphor becomes at least 0.1 mass % and at most 1.5 mass %; and the fluoride phosphor precipitates as the silicon dioxide concurrently dissolves into the aqueous solution.

Fluorescent fluoride, light-emitting device, and process for producing florescent fluoride

A compound represented by the general formula (11) is useful as a light-emitting material. R, R, Rand Rrepresent a group represented by the general formula (2), Rto Rrepresent a hydrogen atom or a substituent, and Lrepresents a substituted or unsubstituted arylene group or a substituted or unsubstituted heteroarylene group. 

Light-emitting material, organic light-emitting device, and compound

The present invention relates to a process for producing a composite-fluoride fluorescent material represented by the general formula AMF:Mn(wherein A is at least one alkali metal element including K; M is one or more metallic elements including at least Si or Ge and selected from among Si, Ge, Sn, Ti, Zr, and Hf; F is fluorine; and Mn is manganese). With the production process, it is possible to obtain a fluorescent material which is high in absorptance, internal quantum efficiency, and external quantum efficiency and has excellent optical properties.

Process for producing fluorescent material

A compound represented by the general formula (1) is useful as a light-emitting material. In the general formula (1), from 0 to 1 of Rto Rrepresents a cyano group, from 1 to 5 of Rto Rrepresent a group represented by the general formula (2) etc., and the balance of Rto Rrepresent a hydrogen atom or a substituent other than above. Rto Rrepresent a hydrogen atom or a substituent, Lrepresents a substituted or unsubstituted arylene group or a substituted or unsubstituted heteroarylene group. 

An organic light-emitting device having a light-emitting layer containing a compound represented by the general formula below has a high light emission efficiency. In the general formula, at least one of Rto Rrepresents a cyano group, at least one of Rto Rrepresents a 9-carbazolyl group, a 1,2,3,4-tetrahydro-9-carbazolyl group, a 1-indolyl group or a diarylamino group, and the balance of Rto Rrepresents a hydrogen atom or a substituent. 

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Fukuoka, Japan

Ryosuke Kondo