Phosphor and manufacturing method of the same, and light emitting device using the phosphor
First Claim
1. A phosphor, which is given as a general composition formula expressed by MmAaBbOoNn:
- Z, (where element M is one or more kinds of elements having bivalent valency, element A is one or more kinds of elements having tervalent valency, element B is one or more kinds of elements having tetravalent valency, O is oxygen, N is nitrogen, and element Z is Ce acting as an activator.), satisfying 4.0<
(a+b)/m<
7.0,0.8≦
a/m≦
1.2, b/a>
2.5, n>
o, 4.0≦
b/m≦
6.0, 0<
o/m≦
3.0,n=2/3m+a+4/3b−
2/3o,wherein when the phosphor is irradiated with one or more kind of monochromatic light or continuous light having a wavelength range from 350 nm to 500 nm as an excitation light, a peak wavelength in an emission spectrum is in the range from 500 to 600 nm.
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Abstract
To provide a phosphor having an emission spectrum with a broad peak in a range from green color to yellow color, having a broad and flat excitation band capable of using lights of broad range from near ultraviolet/ultraviolet to blue lights as excitation lights, and having excellent emission efficiency and luminance. The problem is solved by providing the phosphor expressed by a general composition formula MmAaBbOoNn:Z (where element M is one or more kinds of elements having bivalent valency, element A is one or more kinds of elements having tervalent valency, element B is one or more kinds of elements having tetravalent valency, O is oxygen, N is nitrogen, and element Z is one or more kinds of elements acting as the activator.), satisfying 4.0<(a+b)/m<7.0, a/m≧0.5, b/a >2.5, n>o, n=2/3 m+a+4/3 b−2/3 o.
70 Citations
31 Claims
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1. A phosphor, which is given as a general composition formula expressed by MmAaBbOoNn:
- Z, (where element M is one or more kinds of elements having bivalent valency, element A is one or more kinds of elements having tervalent valency, element B is one or more kinds of elements having tetravalent valency, O is oxygen, N is nitrogen, and element Z is Ce acting as an activator.), satisfying 4.0<
(a+b)/m<
7.0,0.8≦
a/m≦
1.2, b/a>
2.5, n>
o, 4.0≦
b/m≦
6.0, 0<
o/m≦
3.0,n=2/3m+a+4/3b−
2/3o,wherein when the phosphor is irradiated with one or more kind of monochromatic light or continuous light having a wavelength range from 350 nm to 500 nm as an excitation light, a peak wavelength in an emission spectrum is in the range from 500 to 600 nm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
- Z, (where element M is one or more kinds of elements having bivalent valency, element A is one or more kinds of elements having tervalent valency, element B is one or more kinds of elements having tetravalent valency, O is oxygen, N is nitrogen, and element Z is Ce acting as an activator.), satisfying 4.0<
-
20. A phosphor, which is given as a general composition formula expressed by MmAaBbOoNn:
- Z, (where element M is one or more kinds of elements having bivalent valency, element A is one or more kinds of elements having tervalent valency, element B is one or more kinds of elements having tetravalent valency, O is oxygen, N is nitrogen, and element Z is Eu acting as an activator.), satisfying 4.0<
(a+b)/m<
7.0,0 8≦
a/m≦
1.2,b/a>
2.5,n>
o,4.0≦
b/m≦
6.0,0<
o/m≦
3.0,n=2/3m+a+4/3b−
2/3o,wherein when the phosphor is irradiated with one or more kind of monochromatic light or continuous light having a wavelength range from 350 nm to 500 nm as an excitation light, a peak wavelength of an emission spectrum is in the range from 550 to 650 nm. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
- Z, (where element M is one or more kinds of elements having bivalent valency, element A is one or more kinds of elements having tervalent valency, element B is one or more kinds of elements having tetravalent valency, O is oxygen, N is nitrogen, and element Z is Eu acting as an activator.), satisfying 4.0<
Specification