Phosphor and production method of the same, method of shifting emission wavelength of phosphor, and light source and LED
First Claim
1. A phosphor comprising a main production phase of a phosphor expressed by a composition formula of MmAaBbOoNn:
- Zz (where an element M is one or more bivalent elements, an element A is one or more trivalent elements, an element B is one or more tetravalent elements, O is oxygen, N is nitrogen, an element Z is an activator, n=2/3m+a+4/3b−
2/3o, m/(a+b)≧
1/2, (o+n)/(a+b)>
4/3, and each of m, a, b, o and n is not
0).
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Accused Products
Abstract
A phosphor of which emission wavelength can be optionally set in a region with high human visual sensitivity to make it possible to enhance lumlinance in the region, and which has an excitation band for light in a wavelength region emitted from the aforesaid light emitting portion, a production method of the same, illumination and an LED using the aforesaid phosphor are provided. As raw materials, for example, Ca3N2, CaO, Al2O3, AlN, Si3N4, and SiO2 an Eu2O3 are prepared, and each of the raw material is weighed so that a mole ratio of each element is, for example, (Ca, Eu): Al: Si=1:1:1, mixed and prepared under a nitrogen atmosphere, fired at 1500° C. under the nitrogen atmosphere to obtain a main production phase of a phosphor expressed by CaAlSiN3:Eu, and by controlling a compounding amount of each raw material at the time of raw material preparation, the oxygen concentration in the constitution of the production phase and mol concentration of Eu doping are controlled to optionally set the emission wavelength of the production phase.
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Citations
19 Claims
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1. A phosphor comprising a main production phase of a phosphor expressed by a composition formula of MmAaBbOoNn:
- Zz (where an element M is one or more bivalent elements, an element A is one or more trivalent elements, an element B is one or more tetravalent elements, O is oxygen, N is nitrogen, an element Z is an activator, n=2/3m+a+4/3b−
2/3o, m/(a+b)≧
1/2, (o+n)/(a+b)>
4/3, and each of m, a, b, o and n is not
0). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
- Zz (where an element M is one or more bivalent elements, an element A is one or more trivalent elements, an element B is one or more tetravalent elements, O is oxygen, N is nitrogen, an element Z is an activator, n=2/3m+a+4/3b−
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9. A phosphor comprising 24 wt % to 30 wt % of Ca (calcium), 17 wt % to 21 wt % of Al (aluminum), 18 wt % to 22 wt % of Si (silicon), 1 wt % to 15 wt % of oxygen, 15 wt % to 33 wt % of nitrogen and 0.01 wt % to 10 wt % of Eu (europium),
wherein an emission maximum in an emission spectrum is in a range of 600 nm to 660 nm; - and
wherein color chromaticity x of light emission is in a range of 0.5 to 0.7, and color chromaticity y of the light emission is in a range of 0.3 to 0.5.
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Specification