Luminescent particles, methods and light emitting devices including the same
AssigneeCree, Inc.
InventorsBrian Thomas Collins, Jesse Colin Reiherzer, Florin A. Tudorica
Life of this patent
Estimating the term…
Abstract
A luminescent particle includes an interior portion of the luminescent particle comprising a luminescent compound that reacts with atmospherically present components and a passivating layer on an outer surface of the luminescent particle that is operable to inhibit the reaction between the luminescent compound and the atmospherically present components.
Claims12
A method of providing a luminescent particle, the method comprising:
- providing a luminescent particle comprising a nitride;
- and
- heating the luminescent particle in boiling water to reduce a reactive characteristic of an outer surface of the luminescent particle.
A method of providing a luminescent particle, the method comprising:
- providing a luminescent particle comprising a nitride;
- and
- heating the luminescent particle in a boiling nitric acid solution having a concentration of less than about 0.1 mol/Liter to reduce a reactive characteristic of an outer surface of the luminescent particle.
A method of stabilizing a luminescent particle, the method comprising:
- providing a luminescent particle comprising a host compound selected from the group consisting of Ca1-xSrxAlSiN3, Ca2Si5N8, Sr2Si5N8, Ba2Si5N8, BaSi7N10, BaYSi4N7, Y5(SiO4)3N, Y4Si2O7N2, YSiO2N, Y2Si3O3N4, Ca1.5Si9Al3N16, Y0.5Si9Al3O1.5N14.5, CaSiN2, Y2Si4N6C, and/or Y6S11N20O, and at least one activator comprising Ce, Eu, Sm, Yb, Gd and/or Tb, and, wherein 0≦x<1;
- and
- heating the luminescent particle in boiling water to reduce a reactive characteristic of an outer surface of the luminescent particle.
A method of stabilizing a luminescent particle, the method comprising:
- providing a luminescent particle comprising a host compound selected from the group consisting of Ca1-xSrxAlSiN3, Ca2Si5N8, Sr2Si5N8, Ba2Si5N8, BaSi7N10BaYSi4N7, Y5(SiO4)3N, Y4Si2O7N2, YSiO2N, Y2Si3O3N4, Ca1.5Si9Al3N16Y0.5Si9Al3O1.5N14.5, CaSiN2, Y2Si4N6C, and/or Y6S11N20O, and at least one activator comprising Ce, Eu, Sm, Yb, Gd and/or Tb, and, wherein 1≦x<1;
- and
- heating the luminescent particle in a boiling nitric acid solution having a concentration of less than about 0.1 mol/Liter to reduce a reactive characteristic of an outer surface of the luminescent particle.
Dependencies are inferred from the claim text.