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Borate phosphor materials for use in lighting applications

  • US 7,274,045 B2
  • Filed: 03/17/2005
  • Issued: 09/25/2007
  • Est. Priority Date: 03/17/2005
  • Status: Expired due to Fees
First Claim
Patent Images

1. A lighting apparatus for emitting white light comprising:

  • a semiconductor light source; and

    a phosphor composition radiationally coupled to the light source, the phosphor composition comprising a phosphor composition including at least one of;

    (A) M3Ln2(BO3)4 doped with at least one activator selected from the group of Eu2+, Mn2+, Pb2+, Ce3+, Eu3+, Tb3+, and Bi3+ where M is at least one of Mg, Ca, Sr, Ba, or Zn, and Ln is at least one of Sc, Y, La, Gd, or Lu;

    (B) M′

    2−

    x
    M′

    x(Al, Ga)2−

    y
    (Si, Ge)yB2O7−

    z
    Nz;

    Eu2+, Mn2+, Pb2+ where M′

    is one or more of alkali metals Na and/or K, M″

    is one or more of alkaline earth Mg, Ca, Sr, Ba or Zn, 0≦

    x≦

    2, 0≦

    y≦

    2, 0≦

    z≦

    4; and

    z=x+y;

    (C) M′

    2−

    x+y′

    M″

    x−

    y′

    (Al, Ga)2−

    y
    (Si, Ge)yB2O7−

    z−

    y′

    NzXy;

    Eu2+, Mn2+, Pb2+, where M′

    is one or more of alkali metals Na and/or K, M″

    is one or more of alkaline earth metals Mg, Ca, Sr, Ba and/or Zn, 0≦

    x≦

    2, 0≦

    y≦

    2, 0≦

    z≦

    4;

    z=x+y, X═

    F and/or Cl, and 0≦

    y′



    2;

    (D) M′

    2−

    x
    M″

    xAl2−

    y+y′

    Siy−

    y′

    B2O7−

    z−

    y′

    NzXy;

    Eu2+, Mn2+, Pb2+, where M′ and

    M″

    are defined above, 0≦

    x≦

    2, 0≦

    y≦

    2, 0≦

    z≦

    4;

    z=x+y, X═

    F and/or Cl, and 0≦

    y′



    2;

    (E) M′

    2−

    x+x′

    M″

    x−

    x″

    Al2−

    y+y′

    Siy−

    y′

    B2O7−

    z−

    x′



    y′

    NzX(x′

    +y′

    )
    ;

    Eu2+, Mn2+, Pb2+, where M′ and

    M″

    are defined above, 0≦

    x≦

    2, 0≦

    y≦

    2, 0≦

    z≦

    4;

    z=x+y, X═

    F and/or Cl, and 0≦

    y′



    2;

    (F) MAl2B2O7;

    Eu2+, Mn2+, Pb2+ where M═

    Mg, Ca, Sr, Ba and/or Zn;

    (G) MAl2−

    x
    SixB2O7−

    x
    Nx;

    Eu2+, Mn2+, Pb2+, where M═

    Mg, Ca, Sr, Ba and/or Zn, and 0≦

    x≦

    2;

    or(H), MAl2B2−

    x
    SixO7−

    x
    Nx;

    Eu2+, Mn2+, Pb2+, where M═

    Mg, Ca, Sr, Ba and/or Zn, and 0≦

    x≦

    2.

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