Phosphor compositions and devices thereof
OwnerSamuel Joseph Camardello, James E. Murphyinventors
Life of this patent
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Abstract
A phosphor composition includes a red phosphor material having a red decay rate and a green phosphor material having a green decay rate. The red phosphor material includes a Mn4+ doped phosphor of Formula I and a Eu3+ doped uranium phosphor, and a difference between the red decay rate and the green decay rate is no more than 7 ms, AxMFy: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 is also provided.
Claims29
A phosphor composition comprises a red phosphor material having a red decay rate and a green phosphor material having a green decay rate, wherein the red phosphor material comprises a Mn4+ doped phosphor of formula I
- AxMFy:Mn4+ (I),
- and a Eu3+ doped uranium phosphor, wherein a difference between the red decay rate and the green decay rate is no more than 7 ms, and 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.
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A device comprising an LED light source optically coupled and/or radiationally connected to a phosphor composition, wherein the phosphor composition includes a red phosphor material having a red decay rate and a green phosphor material having a green decay rate, wherein the red phosphor material includes a Mn4+ doped phosphor of formula I,
- AxMFy:Mn4+ (I),
- and a Eu3+ doped uranium phosphor, wherein a difference between the red decay rate and the green decay rate is no more than 7 ms, and 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.
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Dependencies are inferred from the claim text.