YELLOW LIGHT-EMITTING HALOPHOSPHATE PHOSPHORS AND LIGHT SOURCES INCORPORATING THE SAME
First Claim
1. A luminescent material being activated by both europium and manganese and having a composition represent by (Ca1-x-y-p-qSrxBayMgzEupMnq)a(PO4)3(F,Cl,OH), wherein 0≦
- x≦
1, 0≦
y≦
1, 0≦
z≦
1, 0<
p≦
0.3, 0<
q≦
0.3, 0<
x+y+z+p+q≦
1 and 4.5≦
a≦
5;
said luminescent material being capable of absorbing electromagnetic radiation that has wavelengths in a range from about 315 nm to about 450 nm and being capable of emitting visible light.
8 Assignments
0 Petitions
Accused Products
Abstract
Halophosphate luminescent materials co-activated with europium and manganese ions and having the general formula of (Ca,Sr,Ba,Mg)5(PO4)3:Eu2+, Mn2+ are disclosed. The inclusion of manganese shifts the peak emission to longer wavelengths and, thus, is beneficial in generating a bright yellow-to-orange light. White-light sources are produced by disposing a halophosphate luminescent material, optionally with a blue light-emitting phosphor, in the vicinity of a near UV/blue LED. Blue light-emitting phosphors that may be used in embodiments of the present inventions are Sr4Al14O25:Eu2+, Sr6P6BO20:Eu2+, BaAl8O13:Eu2+, (Sr,Mg,Ca,Ba)5(PO4)3Cl:Eu2+, and Sr2Si3O6.2SrCl2:Eu2+.
97 Citations
25 Claims
-
1. A luminescent material being activated by both europium and manganese and having a composition represent by
(Ca1-x-y-p-qSrxBayMgzEupMnq)a(PO4)3(F,Cl,OH), wherein 0≦ - x≦
1, 0≦
y≦
1, 0≦
z≦
1, 0<
p≦
0.3, 0<
q≦
0.3,0<
x+y+z+p+q≦
1 and 4.5≦
a≦
5;
said luminescent material being capable of absorbing electromagnetic radiation that has wavelengths in a range from about 315 nm to about 450 nm and being capable of emitting visible light. - View Dependent Claims (2, 3)
- x≦
-
4. A luminescent material being activated by both europium and manganese and having a composition represent by
(Ca1-p-qEupMnq)a(PO4)3F, wherein 0< - p≦
0.3, 0<
q≦
0.3, and 4.5≦
a≦
5;
said luminescent material being capable of absorbing electromagnetic radiation that has wavelengths in a range from about 315 nm to about 450 nm and being capable of emitting visible light. - View Dependent Claims (5, 6)
- p≦
-
7. A luminescent material being activated by both europium and manganese and having a composition represent by
(Ca1-p-qEupMnq)(PO4)3Cl, wherein 0< - p≦
0.3, 0<
q≦
0.3, and 4.5≦
a≦
5;
said luminescent material being capable of absorbing electromagnetic radiation that has wavelengths in a range from about 315 nm to about 450 nm and being capable of emitting visible light. - View Dependent Claims (8, 9)
- p≦
-
10. A light source comprising:
-
at least one LED that is capable of emitting electromagnetic radiation having wavelengths in a range from near UV to blue; and
at least one luminescent material selected from the group of luminescent materials having a general formula of (Ca1-x-y-p-qSrxBayMgzEupMnq)a(PO4)3(F,Cl,OH), wherein 0≦
x≦
1, 0≦
y≦
1, 0≦
z≦
1, 0<
p≦
0.3, 0<
q≦
0.3, 0<
x+y+z+p+q≦
1, and 4.5≦
a≦
5;
said luminescent material being capable of absorbing said electromagnetic radiation emitted by said LED and emitting light having wavelengths in the visible spectrum. - View Dependent Claims (11, 12, 13)
-
-
14. A light source comprising:
-
at least one LED that is capable of emitting electromagnetic radiation having wavelengths in a range from near UV to blue; and
a luminescent material having a formula of (Ca1-p-qEupMnq)a(PO4)3F, wherein 0<
p≦
0.3, 0<
q≦
0.3, and 4.5≦
a≦
5;
said luminescent material being capable of absorbing said electromagnetic radiation emitted by said LED and emitting light having wavelengths in the visible spectrum. - View Dependent Claims (15)
-
-
16. A light source comprising:
-
at least one LED that is capable of emitting electromagnetic radiation having wavelengths in a range from near UV to blue; and
a luminescent material having a formula of (Ca1-p-qEupMnq)a(PO4)3Cl, wherein 0<
p≦
0.3, 0<
q≦
0.3, and 4.5≦
a≦
5;
said luminescent material being capable of absorbing said electromagnetic radiation emitted by said LED and emitting light having wavelengths in the visible spectrum. - View Dependent Claims (17)
-
-
18. A light source comprising:
-
a plurality of LEDs, each being capable of emitting electromagnetic radiation having wavelengths in a range from near UV to blue; and
at least one luminescent material selected from the group of luminescent materials having a general formula of (Ca1-x-y-p-qSrxBayMgzEupMnq)a(PO4)3(F,Cl,OH), wherein 0≦
x≦
1, 0≦
y≦
1, 0≦
z≦
1, 0<
p≦
0.3, 0<
q≦
0.3, 0<
x+y+z+p+q≦
1, and 4.5≦
a≦
5;
said luminescent material being capable of absorbing said electromagnetic radiation emitted by said LED and emitting light having wavelengths in the visible spectrum. - View Dependent Claims (19, 20, 21)
-
-
22. A light source comprising:
-
a plurality of LEDs, each being capable of emitting electromagnetic radiation having wavelengths in a range from near UV to blue; and
a luminescent material having a formula of (Ca1-p-qEupMnq)a(PO4)3F, wherein 0<
p≦
0.3, 0<
q≦
0.3, and 4.5≦
a≦
5;
said luminescent material being capable of absorbing said electromagnetic radiation emitted by said LED and emitting light having wavelengths in the visible spectrum. - View Dependent Claims (23)
-
-
24. A light source comprising:
-
a plurality of LEDs, each being capable of emitting electromagnetic radiation having wavelengths in a range from near UV to blue; and
a luminescent material having a formula of (Ca1-p-qEupMnq)5(PO4)3Cl, wherein 0<
p≦
0.3, 0<
q≦
0.3, and 4.5≦
a≦
5;
said luminescent material being capable of absorbing said electromagnetic radiation emitted by said LED and emitting light having wavelengths in the visible spectrum. - View Dependent Claims (25)
-
Specification