Manganese-doped phosphor materials for high power density applications
A lighting apparatus is presented. The lighting apparatus includes a semiconductor light source capable of producing blue light of high power density, the semiconductor light source radiationally coupled to a phosphor of formula I in a monolithic form selected from single crystal and ceramic, Ax (M, Mn)Fy (I) where 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 an [MFy] ion; and y is 5, 6, or 7.
1. A lighting apparatus comprising:
a semiconductor light source capable of producing blue light of high power density, the semiconductor light source radiationally coupled to a phosphor of formula I in a monolithic single crystal form;
A x (M,Mn)F y (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 an [MF y ] ion; and y is 5, 6, or 7.
2. The lighting apparatus according to claim 1 , wherein
A is Na, K, Rb, Cs, or a combination thereof;
M is Si, Ge, Ti, or a combination thereof; and y is 6.
3. The lighting apparatus according to claim 1 , wherein A is K and M is Si.
4. The lighting apparatus according to claim 1 , wherein the phosphor of formula I in the monolithic single crystal form is disposed on a phosphor wheel.
5. The lighting apparatus according to claim 1 , comprising an automotive headlamp.
6. A backlight apparatus comprising:
a semiconductor light source capable of producing blue light of high power density, the semiconductor light source radiationally coupled to a phosphor of formula I in a monolithic single crystal form;
A x (M,Mn)F y (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 an [MF y ] ion; and y is 5, 6, or 7.
7. The backlight apparatus according to claim 6 , comprising a television.