Phosphor, method for producing a phosphor and use of a phosphor
First Claim
1. A lighting device comprising:
- a primary radiation source configured to emit primary radiation in a wavelength range between 300 nm and 570 nm; and
a first phosphor disposed in a beam path of the primary radiation source, the first phosphor configured to convert at least a portion of the primary radiation to secondary radiation within an orange to red wavelength range from 570 nm to 800 nm,wherein the first phosphor has the formula;
Sr(SraM1−
a)Si2Al2(N,X)6;
D,A,B,E,G,L,wherein element M is selected from the group consisting of Ca, Ba, Mg and combinations thereof,wherein element D is one or more elements selected from the group consisting of Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm, alkali metals and Yb,wherein element A is selected from divalent metals different than those of the elements M and D,wherein element B is selected from trivalent metals,wherein element E is selected from monovalent metals,wherein element G is selected from tetravalent elements,wherein element L is selected from trivalent elements,wherein element X is selected from 0 or halogen,wherein a parameter a is between 0.6 and 1.0, andwherein the first phosphor crystallizes in space groups P1, P2, P1 or P21.
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Abstract
A phosphor and a lighting device are disclosed. In an embodiment a lighting device includes a first phosphor disposed in a beam path of the primary radiation source, wherein the first phosphor has the formula Sr(SraM1−a)Si2Al2(N,X)6:D,A,B,E,G,L, wherein element M is selected from Ca, Ba, Mg or combinations thereof, wherein element D is one or more elements selected from Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm, alkali metals or Yb, wherein element A is selected from divalent metals different than those of the elements M and D, wherein element B is selected from trivalent metals, wherein element E is selected from monovalent metals, wherein element G is selected from tetravalent elements, wherein element L is selected from trivalent elements, wherein element X is selected from O or halogen, and wherein a parameter a is between 0.6 and 1.0.
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Citations
18 Claims
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1. A lighting device comprising:
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a primary radiation source configured to emit primary radiation in a wavelength range between 300 nm and 570 nm; and a first phosphor disposed in a beam path of the primary radiation source, the first phosphor configured to convert at least a portion of the primary radiation to secondary radiation within an orange to red wavelength range from 570 nm to 800 nm, wherein the first phosphor has the formula;
Sr(SraM1−
a)Si2Al2(N,X)6;
D,A,B,E,G,L,wherein element M is selected from the group consisting of Ca, Ba, Mg and combinations thereof, wherein element D is one or more elements selected from the group consisting of Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm, alkali metals and Yb, wherein element A is selected from divalent metals different than those of the elements M and D, wherein element B is selected from trivalent metals, wherein element E is selected from monovalent metals, wherein element G is selected from tetravalent elements, wherein element L is selected from trivalent elements, wherein element X is selected from 0 or halogen, wherein a parameter a is between 0.6 and 1.0, and wherein the first phosphor crystallizes in space groups P1, P2, P 1 or P21. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A light-emitting diode comprising:
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at least one semiconductor chip configured to emit blue light; and a phosphor arranged downstream of the semiconductor chip along a beam path, wherein the phosphor is capable for emission of red light and has the formula;
SrxCa1-xAlSiN3;
Eu,wherein x is 0.8<
x≤
1, wherein between 0.1% and 5% inclusive of Sr, Ca and/or Sr/Ca lattice sites have been replaced by Eu,wherein a full-width at half maximum is between at least 70 nm and at most 90 nm, and wherein, if an x-ray structure analysis were to be performed, the phosphor in orthorhombic description exhibits a reflection (R) having the Miller indices 1 2 1.
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18. A phosphor configured to emit red light,
wherein the phosphor has the formula: - SrxCa1-xAlSiN3;
Eu,wherein x is;
0.8<
x≤
1,wherein between 0.1% and 5% inclusive of Sr, Ca and/or Sr/Ca lattice sites are replaced by Eu, wherein a full-width at half maximum is between 70 nm and 90 nm, and wherein, if an a x-ray structure analysis were to be performed, the phosphor in orthorhombic description exhibits a reflection (R) having the Miller indices 1 2 1.
- SrxCa1-xAlSiN3;
Specification