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US 2006/0033070 A1Published application
Quantum-splitting fluoride-based phosphors, method of producing, and devices incorporating the same
AssigneeGeneral Electric Company
InventorsVenkatesan Manivannan, Alok Srivastava, Holly Comanzo
Life of this patent
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Abstract
A quantum-splitting phosphor has a formula of ADF5:Pr3+, wherein A is at least one alkaline-earth metal and D is at least one Group-IIIB metal. The phosphor is made in a solid-state method without using hazardous HF gas. The phosphor can be used alone or in conjunction with other phosphors in light sources and displays wherein it can be excited by VUV radiation, and increase the efficiency of these devices.
Claims21
A phosphor comprising a material having a formula of ADF5:Pr3+;
- wherein A is selected from the group consisting of Ba;
- Mg;
- Sr and Ca;
- Sr and Mg;
- Ba and Ca;
- Ba and Mg;
- Ca and Mg;
- Sr, Ba, and Ca;
- Sr, Ba, and Mg;
- Ba, Ca, and Mg;
- and Sr, Ba, Ca, and Mg;
- and wherein D is selected from the group consisting of Al, Ga, In, and combinations thereof.
9 more elements
A phosphor blend comprising:
- (a) a first phosphor having a formula of ADF5:Pr3+;
- wherein A is selected from the group consisting of Mg, Ca, Sr, Ba, and combinations thereof;
- and wherein D is selected from the group consisting of Al, Ga, In, and combinations thereof;
- (b) at least a second phosphor selected from the group consisting of LaPO4:Ce3+,Tb3+;
- GdMgB5O10:Ce3+,Tb3+;
- CeMgAl11O19:Ce3+, Tb3+;
- Ca5(PO4)3(Cl,F,OH):Sb3+,Mn2+,Eu2+;
- Sr4Al14O25:Eu2+;
- and BaAl8O13:Eu2+;
- (Ba,Sr,Ca)5(PO4)3(Cl,F,OH):Eu2+;
- (Ba,Sr,Ca)MgAl10O17:Eu2+;
- (Ba,Sr,Ca)BPO5:Eu2+;
- BaAl8O13:Eu2+;
- 2SrO.0.84P2O5.0.16B2O3:Eu2+;
- MgWO4;
- BaTiP2O8;
- (Ba,Sr,Ca)MgAl10O17:Eu2+,Mn2+;
- (Ba,Sr,Ca)5(PO4)3(Cl,F,OH):Sb3+;
- (Y,Gd,La,Lu,Sc)2O3:Eu3+;
- (Y,Gd,La,In,Lu,Sc)BO3:Eu3+;
- (Y,Gd,La)(Al,Ga)03:Eu3+;
- (Ba,Sr,Ca)(Y,Gd,La,Lu)2O4:Eu3+;
- (Y,Gd)Al3B4O12:Eu3+;
- monoclinic Gd2O3:Eu3+;
- (Gd,Y)4(Al,Ga)2O9:Eu3+;
- (Ca,Sr)(Gd,Y)3(Ge,Si)AlO9:Eu3+;
- (Sr,Mg)3(PO4)2:Sn2+;
- GdMgB5O10:Ce3+,Mn2+;
- and 3.5MgO.0.5MgF2.GeO2:Mn4+:
- and Y2O3:Eu3+.
27 more elements
A phosphor blend comprising:
- (a) LaPO4:Ce3+,Tb3+;
- (b) Y2O3:Eu3+;
- and (c) another phosphor having a formula of ADF5:Pr3+;
- wherein A is selected from the group consisting of Mg, Ca, Sr, Ba, and combinations thereof;
- and wherein D is selected from the group consisting of Al, Ga, In, and combinations thereof.
2 more elements
A method for producing a phosphor comprises:
- (a) providing in sealed container a mixture of fluoride compounds of each of:
- (1) praseodymium;
- (2) at least an alkaline-earth metal;
- and (3) at least a Group-IIIB metal;
- the sealed container containing an atmosphere consisting essentially of inert gas;
- and (b) heating the mixture in the sealed container to a temperature for a time sufficient to convert the mixture to a single-phase solid fluoride of said at least an alkaline-earth metal and said at least a Group-IIIB metal, the single-phase solid fluoride being doped with praseodymium ions.
3 more elements
A light source comprising:
- (a) a source of UV radiation that is located in a sealed housing, said UV radiation including a portion in a VUV range;
- and
- (b) a phosphor material disposed within the sealed housing and adapted to be excited by the UV radiation and to emit visible light, wherein the phosphor material comprises a first phosphor having a formula of ADF5:Pr3+;
- wherein A is selected from the group consisting of Mg, Ca, Sr, Ba, and combinations thereof;
- and wherein D is selected from the group consisting of Al, Ga, In, and combinations thereof.
2 more elements
A display comprising:
- (a) a source of electrons;
- and
- (b) a phosphor material disposed within the sealed housing and adapted to be excited by the electrons and to emit visible light, wherein the phosphor material comprises a first phosphor having a formula of ADF5:Pr3+;
- wherein A is selected from the group consisting of Mg, Ca, Sr, Ba, and combinations thereof;
- and wherein D is selected from the group consisting of Al, Ga, In, and combinations thereof.
2 more elements
Dependencies are inferred from the claim text.