Indium-substituted aluminate phosphor and method for making the same
AssigneeUSR Optonix Inc.
InventorsTakashi Hase, Sawsan Aziz
Life of this patent
Estimating the term…
Abstract
A phosphor containing O, Al, In, at least one element M selected from a group consisting of Sr, Ca and Ba, and Eu, as an activator, where the M, the Al, the In and the Eu are present in an atomic ratio M:Al:In:Eu of m:2n(1−y):2n(y):a, 0.3<m/n≦2, 0≦y≦0.2, and 1×10−5≦a≦1×10−1, exhibits excellent luminance, afterglow and durability. Also a phosphor containing O, Al, In, B, at least one element M selected from a group consisting of Sr, Ca and Ba, and Eu2+ as an activator, where the M, the Al, the In, the B and the Eu are present in an atomic ratio M:Al:In:B:Eu of m:2n(1−y−z):2n(y−z):2n(z):a, 0.3≦m/n≦2, 0<y≦0.2, 0<z≦0.05, and 1×10−5≦a≦1×10−1 exhibits excellent luminance, afterglow and durability.
Claims36
A phosphor, comprising:
- a composition having a formula (I)
- m(M1−xM′x)O n(Al1−y Iny)2O3:aEu2+, bLn, cX (I)
- wherein M is at least one element selected from a group consisting of Sr, Ca and Ba,
- M′ is at least one element selected from a group consisting of Mg, Zn and Cd,
- Ln is at least one element selected from a group consisting of Sc, Y, La, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, B, Ga, Tl, Sb, Bi, As, P, Sn, Si, Ge, Pb, Ti, Zr, Hf, V, Nb, Ta, Mo, W, Cr and Mn,
- X is at least one halogen,
- 0.3≦m/n≦2,
- 0≦x≦0.2,
- 0<y≦0.2,
- 1×10−5≦a≦1×10−1,
- 0≦b≦1×10−1, and
- 0≦c≦1×10−1.
A phosphor, comprising:
- a composition having a formula (II)
- m(M1−xM′x)O n(A1−y−z InyBz)2O3:aEu2+, bLn, cX (II)
- wherein M is at least one element selected from a group consisting of Sr, Ca and Ba,
- M′ is at least one element selected from a group consisting of Mg, Zn and Cd,
- Ln is at least one element selected from a group consisting of Sc, Y, La, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Ga, Ti, Sb, Bi, As, P, Sn, Si, Ge, Pb, Ti, Zr, Hf, V, Nb, Ta, Mo, W, Cr and Mn,
- X is at least one halogen,
- 0.3≦m/n≦2,
- 0≦x≦0.2,
- 0<y≦0.2,
- 0<z≦0.05,
- 1×10−5≦a≦1×10−1,
- 0≦b≦1×10−1, and
- 0≦c≦1×10−1.
A phosphor comprising:
- a composition having a formula (III)
- m(M1−xM′x)O n(A1−y−z InyBz)2O3:aEu2+ (III)
- wherein M is at least one element selected from a group consisting of Sr, Ca and Ba,
- M′ is at least one element selected from a group consisting of Mg, Zn and Cd,
- 0.3≦m/n≦2,
- 0≦x≦0.2,
- 0<y≦0.2,
- 0<z≦0.05, and
- 1×10−5≦a≦1×10−1.
Dependencies are inferred from the claim text.