Luminescent substance and illuminating device
A luminophore may have the general empirical formula X 3 A 7 Z 3 O 11 :E, where: X=Mg, Ca, Sr, Ba, and/or Zn; A=Li, Na, K, Rb, Cs, Cu, and/or Ag; Z=Al, Ga, and/or B; and E=Eu, Ce, Yb, and/or Mn.
1. A phosphor having the general empirical formula X 3 A 7 Z 3 O 11 :E, wherein:
X=Mg, Ca, Sr, Ba, Zn, or combinations thereof;
A=Li, Na, K, Rb, Cs, Cu, Ag, or combinations thereof;
Z=Al, Ga, B, or combinations thereof; and
E=Eu, Ce, Yb, Mn, or combinations thereof.
2. The phosphor as claimed in claim 1 , wherein:
X=Mg, Ca, Sr, and/or Ba;
A=Li, Na, K, Rb, Cs, Cu, Ag, or combinations thereof;
Z=Al, Ga, B, or combinations thereof; and
E=Eu, Ce, Yb, Mn, or combinations thereof.
3. The phosphor as claimed in claim 1 , wherein the general empirical formula is (Ba 1-x X* x ) 3 A 7 Z 3 O 11 :E, wherein:
X*=Mg, Ca, Sr, or combinations thereof;
A=Li, Na, K, Rb, Cs, Cu, Ag, or combinations thereof;
Z=Al, Ga, B, or combinations thereof;
E=Eu, Ce, Yb, Mn, or combinations thereof; and
0≤x≤1.
4. The phosphor as claimed in claim 3 , wherein:
X*=Mg, Ca, Sr, or combinations thereof;
A=Li, Na, K, Rb, Cs, or combinations thereof;
Z=Al, Ga, B, or combinations thereof; and
E=Eu, Ce, Yb, Mn, or combinations thereof and
0≤x=0.25.
5. The phosphor as claimed in claim 3 , wherein the general empirical formula is (Ba 1-x X* x ) 3 A 7 (Al 1-y Ga y ) 3 O 11 :E, wherein:
X*=Mg, Ca, Sr, or combinations thereof;
A=Li, Na, K, Rb, Cs, or combinations thereof;
E=Eu, Ce, Yb, Mn, or combinations thereof;
0≤y≤1 and
0≤x≤1.
6. The phosphor as claimed in claim 1 ; wherein the general empirical formula is Ba 3 A 7 Al 3 O 11 :E, wherein:
A=Li, Na, K, Rb, Cs, or combinations thereof; and
E=Eu, Ce, Yb, Mn, or combinations thereof.
7. The phosphor as claimed in claim 1 wherein the general empirical formula is Ba 3 Li 7 Al 3 O 11 :E, wherein:
E=Eu, Ce, Yb, Mn, or combinations thereof.
8. The phosphor as claimed in claim 1 , wherein E=Eu.
9. The phosphor as claimed in claim 1 , wherein the phosphor crystallizes in a cubic crystal system.
10. The phosphor as claimed in claim 1 , wherein the phosphor crystallizes in a in the cubic space group Fm 3 m.
11. An illumination device comprising a phosphor as claimed in claim 1 .
12. The illumination device as claimed in claim 11 , wherein:
a semiconductor layer sequence configured to emit electromagnetic primary radiation; and
a conversion element comprising the phosphor; and wherein the conversion element at least partly converts the electromagnetic primary radiation into electromagnetic secondary radiation.
13. The illumination device as claimed in claim 12 , wherein the conversion element further comprises:
a second phosphor configured to emit radiation in the green region of the spectrum; and
a third phosphor configured to emit radiation in the orange-red region of the spectrum.