US 7,358,542 B2Granted

Red emitting phosphor materials for use in LED and LCD applications

AssigneeLumination LLC

InventorsEmil Vergilov Radkov, Anant Achyut Setlur, Alok Mani Srivastava, Holly Ann Comanzo, Ljudmil Slavchev Grigorov, Thomas Francis McNulty, Daniel Darcy Doxsee, William Winder Beers

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Abstract

Phosphor compositions including those having the formulas A2-xEuxW1-yMoyO6, where A is selected from Y, Gd, Lu, La, and combinations thereof; and where 0.5≦x≦1.0, 0.01≦y≦1.0; MmOnX, wherein M is selected from the group of Sc, Y, a lanthanide, an alkali earth metal and mixtures thereof; X is a halogen; 1≦m≦3; and 1≦n≦4, and wherein the lanthanide doping level can range from 0.1 to 40% spectral weight; and Eu3+ activated phosphate or borate phosphors. Also disclosed are light emitting devices including a light source and at least one of the above phosphor compositions.

Claims15

Dependent claims

A lighting apparatus for emitting white light comprising:

a semiconductor light source;
and
a phosphor composition radiationally coupled to the light source, the phosphor composition comprising a phosphor composition including at least one of:
(A) A2-xEuxW1-yMoyO6, where A is selected from Y, Gd, Lu, La, and combinations thereof;
and where 0.5≦x≦1.0, 0.01≦y≦1.0;
(B) MmOnX, wherein M is selected from the group consisting of Sc, Y, La, a lanthanide, an alkali earth metal and mixtures thereof;
X is a halogen;
1≦m≦3;
and 1≦n≦4, and having a lanthanide doping level can range from 0.001% to 40% by weight;
or
(C) an Eu3+ activated a phosphate or borate phosphor selected from the group consisting of (Y,Gd,Lu,La)PO4;
(Y,Gd,Lu,La)P3O9;
(Y,Gd,Lu,La)P5O14;
(Sr,Ba,Ca)3(Lu,Gd,Y,La)P3O12;
Ca1.5Ba1.5(La,Y,Gd,Lu)P3O12;
(Y,La,Lu,Gd)BO3;
(Gd,Y,Lu,La)B3O6;
(La,Gd,Lu,Y)(Al,Ga)3B4O12;
(Y,Gd,Lu,La)MgB5O10;
(Sr,Ca,Ba)(Lu,Gd,Y,La)B7O13;
Ca0.5Ba0.5LaB7O13;
and blends thereof.

19 more elements

Dependencies are inferred from the claim text.