Phosphor and manufacturing method for the same, and light emitting device using the phosphor
First Claim
1. A phosphor, which is given by a general composition formula expressed by MAaBbOoNn:
- Z,where element M is at least one alkaline earth metal,element A is Al, or Al and at least one Ga and In,element B is Si or, Si and Ge,element Z is a rare earth or transitional metal,O is oxygen,N is nitrogen, and0<
a<
2, 2<
b<
4, 0<
o<
1, n=2/3(1−
o)+a+4/3b2/3o,wherein the phosphor is irradiated at 25°
C. with a predetermined monochromatic light in a wavelength range from 300 nm to 550 nm as an excitation light, the value of the relative intensity of a maximum peak in an emission spectrum is defined as P25, and when the phosphor is irradiated at 100°
C. with the predetermined monochromatic light as the excitation light, the value of the relative intensity of the maximum peak is defined as P100, the relation of P25 and P100 is given satisfying (P25−
P100)/P25×
100≦
10.0.
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Accused Products
Abstract
To provide a phosphor having an emission spectrum with a broad peak in range from green color to red color, and having excellent emission efficiency and luminance. A phosphor is provided, which is given by a general composition formula expressed by MmAaBbOoNn:Z, (where element M is more than one kind of element having bivalent valency, element A is more than one kind of element having tervalent valency, element B is more than one kind of element having tetravalent valency, O is oxygen, N is nitrogen, and element Z is more than one kind of element acting as an activator.), satisfying 2.5<(a+b)/m<4.5, 0<a/m<2.0, 2.0<b/m<4.0, 0<o/m<1.0, o<n, n=2/3m+a+4/3b−2/3o.
-
Citations
15 Claims
-
1. A phosphor, which is given by a general composition formula expressed by MAaBbOoNn:
- Z,
where element M is at least one alkaline earth metal, element A is Al, or Al and at least one Ga and In, element B is Si or, Si and Ge, element Z is a rare earth or transitional metal, O is oxygen, N is nitrogen, and 0<
a<
2, 2<
b<
4, 0<
o<
1, n=2/3(1−
o)+a+4/3b2/3o,wherein the phosphor is irradiated at 25°
C. with a predetermined monochromatic light in a wavelength range from 300 nm to 550 nm as an excitation light, the value of the relative intensity of a maximum peak in an emission spectrum is defined as P25, and when the phosphor is irradiated at 100°
C. with the predetermined monochromatic light as the excitation light, the value of the relative intensity of the maximum peak is defined as P100, the relation of P25 and P100 is given satisfying (P25−
P100)/P25×
100≦
10.0. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12)
- Z,
-
2. A phosphor, which is given by a general composition formula expressed by MAaBbOoNn:
- Z,
where element M is at least one alkaline earth metal, element A is Al, or Al and at least one Ga and In, element B is Si or, Si and Ge, element Z is a rare earth or transitional metal, O is oxygen, N is nitrogen, and 0<
a<
2, 2<
b<
4, 0<
o<
1, n=2/3(1−
o)+a+4/3b2/3o, containing;not less than 33.0 wt % and not more than 40.0 wt % of Sr; not less than 1.0 wt % and not more than 6.0 wt % of Al; not less than 25.0 wt % and not more than 31.0 wt % of Si; not less than 0.5 wt % and not more than 6.0 wt % of O; not less than 20.0 wt % and not more than 26.0 wt % of N; and not less than 0.1 wt % and not more than 8.0 wt % of Eu, wherein when the phosphor is irradiated with more than one kind of monochromatic light or continuous light in the wavelength range from 300 nm to 550 nm as the excitation light, the phosphor has the emission spectrum with a maximum peak wavelength in a range from 630 to 660 nm. - View Dependent Claims (13)
- Z,
-
3. A phosphor, which is given by a general composition formula expressed by MAaBbOoNn:
- Z,
where element M is at least one alkaline earth metal, element A is Al, or Al and at least one Ga and In, element B is Si or, Si and Ge, element Z is a rare earth or transitional metal, O is oxygen, N is nitrogen, and 0<
a<
2, 2<
b<
4, 0<
o<
1, n=2/3(1−
o)+a4/3b2/3o,which has an orthorhombic crystal structure. - View Dependent Claims (14)
- Z,
-
4. A phosphor, which is given by a general composition formula expressed by MAaBbOoNn:
- Z,
where element M is at least one alkaline earth metal, element A is Al, or Al and at least one Ga and In, element B is Si or, Si and Ge, element Z is a rare earth or transitional metal, O is oxygen, N is nitrogen, and 0<
a<
2, 2<
b<
4, 0<
o<
1, n=2/3(1−
o)+a+4/3b2/3o,which has an x-ray powder diffraction pattern by CoKα
ray with two peaks from 42.0°
to 43.1°
of Bragg angle (2θ
) among the diffraction peaks with 30% or more relative intensity with respect to the relative intensity of the maximum peak,containing a primary particle with particle size of 20 μ
m or less and aggregates in which the primary particle agglutinates, wherein an average particle size (D50) of a powdery phosphor containing the primary particle and the aggregates is not less than 1.0 μ
m and not more than 20.9 μ
m,wherein the aggregates of the primary particle contains a columnar particle. - View Dependent Claims (15)
- Z,
Specification