Films with narrow band emission phosphor materials
AssigneeGeneral Electric Company
InventorsMark D. Doherty, Yangang Liang, Jie Jerry Liu, Samuel Joseph Camardello, James Edward Murphy
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Abstract
A color conversion film is provided. The film includes at least one narrow band emission phosphor dispersed within a binder matrix, wherein the narrow band emission phosphor has a D50 particle size from about 0.1 μm to about 15 μm and is selected from the group consisting of a green-emitting U6+-containing phosphor, a green-emitting Mn2+-containing phosphor, a red-emitting phosphor based on complex fluoride materials activated by Mn4+, and a mixture thereof. A device is also provided.
Claims32
A film comprising at least one phosphor dispersed within a binder matrix, wherein the phosphor has a D50 particle size from about 0.1 μm to about 15 μm and is selected from the group consisting of a green-emitting U6+-containing phosphor, a green-emitting Mn2+-containing phosphor, a red-emitting phosphor based on complex fluoride materials activated by Mn4+, and a mixture thereof, wherein the film is a single layer or has multiple layers.
A film comprising a red-emitting phosphor dispersed within a binder matrix, wherein the red-emitting phosphor has a D50 particle size from about 0.1 μm to about 3 μm or from about 3 μm to about 8.5 μm, wherein the red-emitting phosphor comprises formula I and is at least partially coated with a surface coating comprising a metal fluoride, silica or organic coating, and wherein the film is a single layer or has multiple layers,
- Ax MF y:
- 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, Hf, Y, La, Nb, Ta, Bi, Gd, or a combination thereof;
- x is an absolute value of a charge of the MFy ion;
- and
- y is 5, 6 or 7.
A device comprising an LED light source optically coupled and/or radiationally connected to a film comprising at least one phosphor dispersed within a binder matrix, wherein the phosphor has a D50 particle size from about 0.1 μm to about 15 μm and is selected from the group consisting of a green-emitting U6+-containing phosphor, a green-emitting Mn2+-containing phosphor, a red-emitting phosphor based on complex fluoride materials activated by Mn4+, and a mixture thereof, wherein the film is a single layer or has multiple layers.
A film prepared by depositing a composition on a substrate and drying or curing the composition, wherein the composition comprises a binder material and at least one phosphor being uniformly dispersed throughout the composition, the narrow band emission phosphor having a D50 particle size from about 0.1 μm to about 15 μm and is selected from the group consisting of a green-emitting U6+-containing phosphor, a green-emitting Mn2+-containing phosphor, a red-emitting phosphor based on complex fluoride materials activated by Me, and a mixture thereof.
Dependencies are inferred from the claim text.