Garnet phosphor materials having enhanced spectral characteristics
First Claim
1. A lighting apparatus for emitting white light comprising:
- a light source emitting radiation at from about 250 nm to about 550 nm; and
a phosphor composition radiationally coupled to the light source, the phosphor composition comprising (Tb1-x-y-z-wYxGdyLuzCew)3MrAls-rO12+δ
, where M is selected from Sc, In, Ga, Zn, or Mg, and where 0<
w≦
0.3, 0≦
x<
1, 0≦
y≦
0.4, 0≦
z<
1, 0≦
r≦
4.5, 4.5≦
s≦
6, and −
1.5≦
δ
≦
1.5.
11 Assignments
0 Petitions
Accused Products
Abstract
Phosphor compositions having the formulas (Tb1-x-y-z-wYxGdyLuzCew)3MrAls-rO12+δ, where M is selected from Sc, In, Ga, Zn, or Mg, and where 0<w≦0.3, 0≦x≦1, 0≦y≦0.4, 0≦z<1, 0≦r≦4.5, 4.5≦s≦6, and −1.5≦δ≦1.5; (RE1-xScxCey)2A3-pBpSiz-qGeqO12+δ, where RE is selected from a lanthanide ion or Y3+, A is selected from Mg, Ca, Sr, or Ba, B is selected from Mg and Zn, and where 0≦p≦3, 0≦q≦3, 2.5≦z≦3.5, 0≦x≦1, 0≦y≦0.3, −1.5≦δ≦1.5; and (Ca1-x-y-zSrxBayCez)3(Sc1-a-bLuaDc)2Sin-wGewO12+δ, where D is either Mg or Zn, 0≦x≦1, 0≦y<1, 0<z≦0.3, 0≦a<1, 0≦c≦1, 0≦w≦3, 2.5≦n≦3.5, and −1.5≦δ≦1.5. Also disclosed are light emitting devices including a light source and at least one of the above phosphor compositions.
-
Citations
73 Claims
-
1. A lighting apparatus for emitting white light comprising:
-
a light source emitting radiation at from about 250 nm to about 550 nm; and
a phosphor composition radiationally coupled to the light source, the phosphor composition comprising (Tb1-x-y-z-wYxGdyLuzCew)3MrAls-rO12+δ
, where M is selected from Sc, In, Ga, Zn, or Mg, and where 0<
w≦
0.3, 0≦
x<
1, 0≦
y≦
0.4, 0≦
z<
1, 0≦
r≦
4.5, 4.5≦
s≦
6, and −
1.5≦
δ
≦
1.5. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
-
15. A lighting apparatus for emitting white light comprising:
-
a light source emitting radiation at from about 250 to about 550 nm; and
a phosphor composition radiationally coupled to the light source, the phosphor composition comprising (RE1-xScxCey)2A3-pBpSiz-qGeqO12+δ
, where RE is selected from a lanthanide ion or Y3+, A is selected from Mg, Ca, Sr, or Ba, B is selected from Mg and Zn, and where 0≦
p≦
3, 0≦
q≦
3, 2.5≦
z≦
3.5, 0≦
x<
1, 0<
y≦
0.3, −
1.5≦
δ
≦
1.5. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
-
-
36. A phosphor composition comprising (Tb1-x-y-z-wYxGdyLuzCew)3MrAls-rO12+δ
- , where M is selected from Sc, In, Ga, Zn, or Mg, and where 0≦
w≦
0.3, 0≦
x<
1, 0≦
y≦
0.4, 0≦
z<
1, 0≦
r≦
4.5, 4.5≦
s≦
6, and −
1.5≦
δ
≦
1.5. - View Dependent Claims (37, 38)
- , where M is selected from Sc, In, Ga, Zn, or Mg, and where 0≦
-
39. A phosphor composition comprising (RE1-xScxCey)2A3-pBpSiz-qGeqO12+δ
- , where RE is selected from a lanthanide ion or Y3+, A is selected from Mg, Ca, Sr, or Ba, B is selected from Mg and Zn, and where 0≦
p≦
3, 0≦
q≦
3, 2.5≦
z≦
3.5, 0≦
x<
1, 0<
y≦
0.3, −
1.5≦
δ
≦
1.5. - View Dependent Claims (40, 41, 42, 43, 44, 45, 46, 47)
- , where RE is selected from a lanthanide ion or Y3+, A is selected from Mg, Ca, Sr, or Ba, B is selected from Mg and Zn, and where 0≦
-
48. A phosphor blend including a first phosphor selected from the group consisting of (Tb,Y)3Al4.9O12−
- δ
;
Ce3+ wherein −
1≦
δ
≦
1 and (Tb1-x-y-z-wYxGdyLuzCew)3MrAls-rO12+δ
, where M is selected from Sc, In, Ga, Zn, or Mg, and where 0<
w≦
0.3, 0≦
x<
1, 0≦
y≦
0.4, 0≦
z<
1, 0≦
r≦
4.5, 4.5≦
s≦
6, and −
1.5≦
δ
≦
1.5, and a second phosphor having the formula (RE1-xScxCey)2A3-pBpSiz-qGeqO12+δ
, where RE is selected from a lanthanide ion or Y3+, A is selected from Mg, Ca, Sr, or Ba, B is selected from Mg and Zn, and where 0≦
p≦
3, 0≦
q≦
3, 2.5≦
z≦
3.5, 0≦
x<
1, 0<
y≦
0.3, −
1.5≦
δ
≦
1.5.
- δ
-
49. A phosphor composition comprising (Ca1-x-y-zSrxBayCez)3(Sc1-a-bLuaDc)2Sin-wGewO12+δ
- , where D is either Mg or Zn, 0≦
x<
1, 0≦
y<
1, 0≦
z≦
0.3, 0≦
a<
1, 0≦
c≦
1, 0≦
w≦
3, 2.5≦
n≦
3.5, and −
1.5≦
δ
≦
1.5. - View Dependent Claims (50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63)
- , where D is either Mg or Zn, 0≦
-
64. A lighting apparatus comprising a light source emitting radiation having an emission wavelength of from about 250 to about 500 nm and a phosphor composition comprising (Ca1-x-y-zSrxBayCez)3(Sc1-a-bLuaDc)2Sin-wGewO12+δ
- , where D is either Mg or Zn, 0≦
x<
1, 0≦
y<
1, 0<
z≦
0.3, 0≦
a≦
1, 0≦
c≦
1, 0≦
w≦
3, 2.5≦
n≦
3.5, and −
1.5≦
δ
≦
1.5. - View Dependent Claims (65, 66, 67, 68, 69, 70, 71, 72, 73)
- , where D is either Mg or Zn, 0≦
Specification