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Phosphor and manufacturing method of the same, and light emitting device using the phosphor

  • US 7,524,437 B2
  • Filed: 03/02/2006
  • Issued: 04/28/2009
  • Est. Priority Date: 03/04/2005
  • Status: Expired due to Fees
First Claim
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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.

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