WO2009025469A3 - Non stoichiometric tetragonal copper alkaline earth silicate phosphors and method of preparing the same - Google Patents

Non stoichiometric tetragonal copper alkaline earth silicate phosphors and method of preparing the same Download PDF

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Publication number
WO2009025469A3
WO2009025469A3 PCT/KR2008/004733 KR2008004733W WO2009025469A3 WO 2009025469 A3 WO2009025469 A3 WO 2009025469A3 KR 2008004733 W KR2008004733 W KR 2008004733W WO 2009025469 A3 WO2009025469 A3 WO 2009025469A3
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WO
WIPO (PCT)
Prior art keywords
alkaline earth
copper alkaline
preparing
non stoichiometric
same
Prior art date
Application number
PCT/KR2008/004733
Other languages
French (fr)
Other versions
WO2009025469A2 (en
Inventor
Walter Tews
Gundula Roth
Chung Hoon Lee
Stefan Tews
Original Assignee
Seoul Semiconductor Co Ltd
Walter Tews
Gundula Roth
Chung Hoon Lee
Stefan Tews
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020080074241A external-priority patent/KR101106175B1/en
Application filed by Seoul Semiconductor Co Ltd, Walter Tews, Gundula Roth, Chung Hoon Lee, Stefan Tews filed Critical Seoul Semiconductor Co Ltd
Priority to CN2008801037966A priority Critical patent/CN101784636B/en
Priority to BRPI0815272-1A priority patent/BRPI0815272B1/en
Publication of WO2009025469A2 publication Critical patent/WO2009025469A2/en
Publication of WO2009025469A3 publication Critical patent/WO2009025469A3/en

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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
    • C09K11/7728—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing europium
    • C09K11/77342—Silicates
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps

Abstract

Disclosed are non stoichiometric Copper Alkaline Earth Silicate phosphors activated by divalent europium for using them as high temperature stable luminescent materials for ultraviolet or daylight excitation. The phosphors are represented as the formula (BauSrvCawCux)3.y (Zn,Mg,Mn)zSii+b05+2b:Eua. The nonstoichiometric tetragonal silicate is prepared in a high temperature solid state reaction with a surplus of silica in the starting mixture. Furthermore, luminescent tetragonal Copper Alkaline Earth Silicates are provided for LED applications, which have a high color temperature range from about 2,00OK to 8,000K or 10,000K showing a CRI with Ra=80~95, when mixed with other luminescent materials.
PCT/KR2008/004733 2007-08-22 2008-08-14 Non stoichiometric tetragonal copper alkaline earth silicate phosphors and method of preparing the same WO2009025469A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN2008801037966A CN101784636B (en) 2007-08-22 2008-08-14 Non stoichiometric tetragonal copper alkaline earth silicate phosphors and method of preparing the same
BRPI0815272-1A BRPI0815272B1 (en) 2007-08-22 2008-08-14 NON-ESTEQUIOMETRIC LUMINESCENT MATERIAL FOR LIGHTING DEVICE

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR20070084659 2007-08-22
KR10-2007-0084659 2007-08-22
KR10-2008-0074241 2008-07-29
KR1020080074241A KR101106175B1 (en) 2007-08-22 2008-07-29 Non stoichiometric tetragonal copper alkaline earth silicate phosphors and method of preparing the same

Publications (2)

Publication Number Publication Date
WO2009025469A2 WO2009025469A2 (en) 2009-02-26
WO2009025469A3 true WO2009025469A3 (en) 2009-04-16

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Country Status (7)

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US (2) US8137589B2 (en)
EP (2) EP2031038B1 (en)
JP (1) JP5362288B2 (en)
CN (1) CN101784636B (en)
RU (1) RU2467051C2 (en)
TW (1) TWI466985B (en)
WO (1) WO2009025469A2 (en)

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