×

Metal silicate halide phosphors and LED lighting devices using the same

  • US 20070125982A1
  • Filed: 09/27/2006
  • Published: 06/07/2007
  • Est. Priority Date: 12/02/2005
  • Status: Active Grant
First Claim
Patent Images

1. ) A phosphor having a formula selected from:

  • a) (M1xM21-x)2LiSiO4X;

    A;

    b) (M1xM21-x)5SiO4X6;

    A;

    c) (M1xM21-x)3SiO4X2;

    A;

    d) (M1xM21-x)5(SiO4)2X2;

    A;

    e) (M1xM21-x)5Si2O7X4;

    A;

    f) (M1xM21-x)10(Si2O7)3X2;

    A;

    g) (M1xM21-x)4Si2O7X2;

    A;

    h) M16M24(Si2O7)3X2;

    A;

    i) (M1xM21-x)7Si2O7X8;

    A;

    j) (M1xM21-x)4Si3O8X2;

    A;

    k) (M1xM21-x)4Si3O8X4;

    A;

    l) (M1xM21-x)8Si4O12X8;

    A;

    m) (M1xM21-x)5Si2O6X6;

    A;

    n) (M1xM21-x)15Si6O18X8;

    A;

    o) (M1xM21-x)5Si4O10X5;

    A;

    p) (M1xM21-x)10(SiO4)3(SO4)3X2;

    A;

    q) (M1xM21-x)4(SiO4)(SO4)X2;

    A; and

    r) (M1xM21-x)8Mg(SiO4)4X2;

    A, wherein;

    M1 and M2 are each independently at least one metal ion selected from the group consisting of Mg2+, Ca2+, Sr2+, Ba2+, Zn2+ and Cd2+;

    x is a value from about 0.001 to about 1;

    X is at least one halide ion in ionic form;

    A is at least one activator ion selected from the group consisting of Eu2+, Yb2+, Mn2+, Bi3+, Pb2+, Ce3+, Nd3+, Pr3+, Sm3+, Eu3+, Gd3+, Tb3+, Dy3+, Ho3+, Er3+, Tm3+ and Yb3+;

    if the phosphor has the formula (M1xM21-x)2LiSiO4X;

    A, and M1 is Sr2+, x is 1 and X is fluoride or M2 is Sr2+, x is 0 and X is fluoride, then A is not Eu2+; and

    if the phosphor has the formula (M1xM21-x)3SiO4X2;

    A, and M1 is Ca2+, x is 1 and X is chloride or M2 is Ca2+, x is 0 and X is chloride, then A is not Eu2+; and

    if the phosphor has the formula (M1xM21-x)8Mg(SiO4)4X2;

    A, and M1 is Ca2+, x is 1 and X is chloride or M2 is Ca2+, x is 0 and X is chloride, then A is not Eu2+.

View all claims
  • 7 Assignments
Timeline View
Assignment View
    ×
    ×