(i9) United States
(12) Patent Application Publication
Radkov et al.
(54) RED EMITTING PHOSPHOR MATERIALS FOR USE IN LED AND LCD APPLICATIONS
(75) Inventors: Emil Vergilov Radkov, Euclid, OH
(US); Anant Achyut Setlur, Niskayuna,
NY (US); Alok Mani Srivastava,
Niskayuna, NY (US); Holly Ann
Comanzo, Niskayuna, NY (US);
Ljudmil Slavchev Grigorov, Sofia
(BG); Thomas Francis McNulty,
Ballston Lake, NY (US); Daniel Darcy
Doxsee, Sagamore Hills, OH (US);
William Winder Beers, Chesterland,
FAY, SHARPE, FAGAN, MINNICH & MCKEE,
1100 SUPERIOR AVENUE, SEVENTH FLOOR
CLEVELAND, OH 44114 (US)
(73) Assignee: GELcore, LLC
(21) Appl. No.: 11/049,598
(22) Filed: Feb. 2, 2005
(51) Int. CI.
H01L 33/00 (2006.01)
(52) U.S. CI 257/79
Phosphor compositions including those having the formulas A2.IEii,W1.^lo Oft where Ais selected from Y, Gd, Lu, La, and combinations thereof; and where 0.5=x=1.0, 0.01 Sy£ 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.