Patent ID: 11952521
Assignee: CURRENT LIGHTING SOLUTIONS, LLC
Field: Semiconductors (Electrical engineering)
Classification: CPC C  H  G  Y | IPC C  F  H

Claim 11:
12. A Mn+4 doped phosphor of formula I comprising a monodisperse population of particles having a particle size distribution comprising a D50 particle size of less than 1 μm;

Ax[MFy]:Mn+4  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 [MFy] ion; and
y is 5, 6 or 7;, wherein an aspect ratio of a plurality of particles of the population is less than or equal to 3/1,, wherein the phosphor has a quantum efficiency exceeding 85% under blue excitation,, wherein the phosphor comprises an amount of manganese ranging from about 1.82 wt % to about 5.1 wt % based on total phosphor weight, and, wherein the phosphor is coated with a manganese-free shell comprising KMgF3.