摘要:
The present invention provides a method for producing a zinc sulfide based phosphor by firing a zinc sulfide based phosphor precursor, comprising at least: a first firing step of firing a mixture containing a zinc sulfide based phosphor precursor, sulfur, and a chlorine-containing flux; and a second firing step of further firing the fired product obtained from the first firing step, wherein the first firing step comprises: heating the mixture in an atmosphere wherein an air stream is introduced so that a temperature of the mixture is increased from normal temperature to a transformation temperature at which a crystal system of the phosphor precursor is transformed; when a temperature of the mixture is increased above the transformation temperature, switching the atmosphere to a nitrogen atmosphere and continuing the heating of the mixture; and when the temperature of the mixture reaches a temperature in a range of 1000° C. to 1200° C., inclusive, maintaining the temperature of the mixture at a constant level and thereafter rapidly quenching the mixture and washing the mixture to obtain a fired product; and wherein the second firing step comprises heating in the nitrogen atmosphere the fired product obtained from the first firing step so that the temperature of the fired product is increased from normal temperature to a temperature in a range of 650° C. to 1000° C., inclusive; and when a temperature of the fired product reaches the temperature in the range of 650° C. to 1000° C., inclusive, introducing oxygen while maintaining the temperature of the fired product and thereafter rapidly quenching the fired product and washing the fired product to obtain a zinc sulfide based phosphor. Use of the method of the present invention makes it possible to provide a zinc sulfide based phosphor material suitable for use in the production of an EL device that shows high brightness.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
The process of the invention is provided to achieve uniform doping of an activator metal into phosphor particles and to improve efficiency of utlization of a metal element to be used in the production of a Group II metal sulfide phosphor and a precursor thereof. Specifically, the object of the invention is achieved by 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 the water from the reaction mixture to produce a desired Group II metal sulfide in the reaction mixture, wherein the removal of the water from the reaction mixture is carried out by recovering only the water condensed from a vapor produced by the azeotropic distillation.
摘要:
An M-C—N—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%
摘要:
The present invention provides an Al—C—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 %
摘要:
The present invention provides an Al—C—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 %
摘要:
M-C—N—O based phosphors having high emission intensity are provided without using heavy metals, rare metals, and special activator agents. Colors of the M-C—N—O based phosphors 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—N—O based phosphors.The M-C—N—O based phosphors of the present invention comprise a group IIIB element (M), carbon (C), nitrogen (N), and oxygen (O). Colors are changed by changing an amount of carbon (C) contained in the M-C—N—O based phosphors. The polymer dispersions, inorganic EL devices, light emitting devices, and fluorescent tubes are produced using the M-C—N—O based phosphors.