Orange-red persistent phosphors
AssigneeGeneral Electric Company
InventorsAlok Mani Srivastava, Holly Ann Comanzo, Claire Susan Henderson
Life of this patent
Estimating the term…
Abstract
Orange-red phosphors activated by europium and rare earth ions of formula I and formula II are long persistent, stable, and non-toxic M1F2-M1S: Eu2+, Ln3+ (I) M23M32O5X2: inside or outside Eu2+, Ln3+ (II) wherein M1 is Ba, Sr, Ca, Zn, Mg, or a combination thereof; M2 is Ba, Sr, Ca, Mg, Zn, or a combination thereof; M3 is Al, Ga, B, In, or a combination thereof; X is F, Cl, Br, I, or a combination thereof; and Ln is Dy, Yb, Tm, Er, Ho, Sm, Nd, or a combination thereof.
Claims26
A phosphor activated by europium and rare earth ions, said phosphor selected from phosphors of formula I and phosphors of formula II;
- M1F2-M1S:
- Eu2+, Ln3+ (I)
- M23M32O5X2:
- Eu2+, Ln3+ (II)
- wherein
- M1 is Ba, Sr, Ca, Zn, Mg, or a combination thereof;
- M2 is Ba, Sr, Ca, Mg, Zn, or a combination thereof;
- M3 is Al, Ga, B, In, or a combination thereof;
- X is F, Cl, Br, I, or a combination thereof;
- and
- Ln is Dy, Yb, Tm, Er, Ho, Sm, Nd, or a combination thereof.
A composition comprising a phosphor of formula I or II, dispersed in a polymer matrix;
- M1F2-M1S:
- Eu2+, Ln3+ (I)
- M23M32O5X2:
- Eu2+, Ln3+ (II)
- wherein
- M1 is Ba, Sr, Ca, Zn, Mg, or a combination thereof;
- M2 is Ba, Sr, Ca, Mg, Zn, or a combination thereof;
- M3 is Al, Ga, B, In, or a combination thereof;
- X is F, Cl, Br, I, or a combination thereof;
- and
- Ln is Dy, Yb, Tm, Er, Ho, Sm, Nd, or a combination thereof.
A lighting apparatus comprising a light source and a phosphor of formula I or II radiationally coupled to the light source
- M1F2-M1S:
- Eu2+, Ln3+ (I)
- M23M32O5X2:
- Eu2+, Ln3+ (II)
- wherein
- M1 is Ba, Sr, Ca, Zn, Mg, or a combination thereof;
- M2 is Ba, Sr, Ca, Mg, Zn, or a combination thereof;
- M3 is Al, Ga, B, In, or a combination thereof;
- X is F, Cl, Br, I, or a combination thereof;
- and
- Ln is Dy, Yb, Tm, Er, Ho, Sm, Nd, or a combination thereof.
A phosphor blend comprising a phosphor of formula I or II, dispersed in a polymer matrix;
- M1F2-M1S:
- Eu2+, Ln3+ (I)
- M23M32O5X2:
- Eu2+, Ln3+ (II)
- wherein
- M1 is Ba, Sr, Ca, Zn, Mg, or a combination thereof;
- M2 is Ba, Sr, Ca, Mg, Zn, or a combination thereof;
- M3 is Al, Ga, B, In, or a combination thereof;
- X is F, Cl, Br, I, or a combination thereof;
- and
- Ln is Dy, Yb, Tm, Er, Ho, Sm, Nd, or a combination thereof.
Dependencies are inferred from the claim text.