US 11,746,288 B2
Method to enhance phosphor robustness and dispersability and resulting phosphors
Matthew David Butts, Rexford, NY (US); James Edward Murphy, Niskayuna, NY (US); and Mark Daniel Doherty, Niskayuna, NY (US)
Assigned to General Electric Company, Schenectady, NY (US)
Filed by General Electric Company, Schenectady, NY (US)
Filed on Jan. 18, 2022, as Appl. No. 17/578,335.
Application 17/578,335 is a continuation of application No. 16/419,206, filed on May 22, 2019, granted, now 11,261,375.
Prior Publication US 2022/0135876 A1, May 5, 2022
Int. Cl. C09K 11/61 (2006.01); C09K 11/02 (2006.01); F21V 8/00 (2006.01); H01L 33/50 (2010.01)
CPC C09K 11/617 (2013.01) [C09K 11/02 (2013.01); G02B 6/005 (2013.01); G02B 6/0026 (2013.01); H01L 33/502 (2013.01); H01L 33/507 (2013.01)] 29 Claims
OG exemplary drawing
 
1. A phosphor composition comprising phosphor particles and comprising, on surfaces of the phosphor particles, at least one surface composition selected from the group consisting of: 1) a composition comprising a phosphorus-containing moiety and a carbon-containing moiety; 2) a composition comprising the phosphorus-containing moiety and a metal fluoride; 3) a composition comprising the phosphorus-containing moiety and the carbon-containing moiety and the metal fluoride; and 4) a composition comprising the phosphorus-containing moiety free of an alkyl phosphate compound, wherein the phosphor particles comprise a Mn4+ doped phosphor of formula I;
Ax[MFy]:Mn4+  I
wherein
A is Li, Na, K, Rb, Cs, or a combination thereof;
M is Si, Ge, Sn, Ti, Zr, Al, Ga, In, Sc, Y, La, Nb, Ta, Bi, Gd, or a combination thereof;
x is the absolute value of the charge of the [MF3] ion;
y is 5, 6 or 7, and
wherein a D50 particle size of the phosphor particles is from about 3.9 μm to about 10.0 μm.