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Garnet phosphor materials having enhanced spectral characteristics

  • US 20050093442A1
  • Filed: 10/29/2003
  • Published: 05/05/2005
  • Est. Priority Date: 10/29/2003
  • Status: Active Grant
First Claim
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1. A lighting apparatus for emitting white light comprising:

  • a light source emitting radiation at from about 250 nm to about 550 nm; and

    a phosphor composition radiationally coupled to the light source, the phosphor composition comprising (Tb1-x-y-z-wYxGdyLuzCew)3MrAls-rO12+δ

    , where M is selected from Sc, In, Ga, Zn, or Mg, and where 0<

    w≦

    0.3, 0≦

    x<

    1, 0≦

    y≦

    0.4, 0≦

    z<

    1, 0≦

    r≦

    4.5, 4.5≦

    s≦

    6, and −

    1.5≦

    δ



    1.5.

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