Nitride phosphor, reaction mixture and method production and light emitting device comprising such a phosphor

Provided are a method for preparing a rare-earth doped alkaline-earth silicon nitride phosphor powder having the composition of Me2-xRxSi5N8-yF3y (0<x<1.0, 0=y<0.5) within seconds at ambient temperature; the nitride phosphor prepared therefrom; and a light emitting device comprising the pho...

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Bibliographic Details
Main Authors WON HYUNG SUK, WON CHANG WHAN, NERSISYAN HAYK, WON HYUNG II
Format Patent
LanguageChinese
English
Published 25.12.2013
Subjects
ADHESIVES
BASIC ELECTRIC ELEMENTS
CHEMISTRY
DYES
ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
NATURAL RESINS
PAINTS
POLISHES
SEMICONDUCTOR DEVICES
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Summary:Provided are a method for preparing a rare-earth doped alkaline-earth silicon nitride phosphor powder having the composition of Me2-xRxSi5N8-yF3y (0<x<1.0, 0=y<0.5) within seconds at ambient temperature; the nitride phosphor prepared therefrom; and a light emitting device comprising the phosphor. Such silicon nitride based phosphors having small particle size, large surface area and improved chemical properties can strongly absorb UV and blue light and efficiently convert it into orange-red light, so that they can be used as an effective phosphor to form a smooth layer without sedimentation in a LED package, and as light sources and displays. Especially for applying the fine particles to a LED package, cost reduction can be achieved with respect to the weight ratio.
Bibliography:Application Number: CN201310373532