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AssigneeDowa Electronics Materials Co., Ltd.
InventorsAkira Nagatomi, Kenji Sakane, Tomoya Yamada
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To provide a phosphor for manufacturing an one chip type LED illumination, etc, by combining a near ultraviolet/ultraviolet LED and a blue LED, and having an excellent emission efficiency including luminance. The phosphor 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 one or more kinds of elements acting as an activator.), satisfying a=(1+x)×m, b=(4−x)×m, o=x×m, n=(7−x)×m, 0≦x≦1, wherein when excited by light in a wavelength range from 300 nm to 500 nm, the phosphor has an emission spectrum with a peak wavelength in a range from 500 nm to 620 nm.
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 one or more kinds of elements acting as an activator.), satisfying a=(1+x)×m, b=(4−x)×m, o=x×m, n=(7−x)×m, 0≦x≦1, wherein when excited by light in a wavelength range from 300 nm to 500 nm, the phosphor has an emission spectrum with a peak wavelength in a range from 500 nm to 620 nm.
A phosphor, which is given as a general composition formula expressed by (M(1)m(1)M(2)m(2)Zz)AaBbOoNn, (where element M(1) is one or more kinds of elements having monovalent valency, element M(2) 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 the element acting as the activator.), satisfying 0.5≦a≦2.0, 3.0≦b≦7.0 μm(1)>0, m(2)>0, z>0, 4.0≦(a+b)≦7.0, m(1)+m(2)+z=1, 0<o≦4.0, n=1/3m(1)+2/3m(2)+z+a+4/3b−2/3o, and when the phosphor is irradiated with light with a wavelength range form 300 nm to 500 nm, a peak wavelength in an emission spectrum is in a range from 500 nm to 600 nm.
Dependencies are inferred from the claim text.