Abstract: A persistent phosphor of formula I is provided, along with methods for making and using the phosphor: AxAlyO4:Euj, REk, Bm, Znn, Coo, Scp ??I wherein: A is Ba, Sr, Ca, or a combination of these metals; x is greater than about 0.75 and less than about 1.3; y is greater than or equal to about 1.6 and less than or equal to 2; j is greater than about 0.0005 and less than about 0.1; k is greater than about 0.0005 and less than about 0.1; m is greater than or equal to 0 and less than about 0.30; n is greater than 0 and less than about 0.10; o is greater than 0 and less than about 0.01; p is greater than 0 and less than about 0.05; and RE is Dy, Nd, or a combination thereof. Applications for such phosphors include use in toys, emergency equipment, clothing, and instrument panels, among others.

Abstract: Embodiments of the present techniques provide a related family of phosphors that may be used in lighting systems to generate blue or blue-green light. The phosphors include systems having a general formula of: ((Sr1?zMz)1?(x+w)AwCex)3(Al1?ySiy)O4+y+3(x?w)F1?y?3(x?w) (I), wherein 0<x?0.10, 0?y?0.5, 0?z?0.5, 0?w?x, A is Li, Na, K, Rb, or Ag or any combinations thereof, and M is Ca, Ba, Mg, Zn, or Sn or any combinations thereof. Advantageously, phosphors made accordingly to these formulations maintain emission intensity across a wide range of temperatures. The phosphors may be used in lighting systems, such as LEDs and fluorescent tubes, among others, to produce blue and blue/green light. Further, the phosphors may be used in blends with other phosphors, or in combined lighting systems, to produce white light suitable for illumination.

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.

Abstract: The current invention provides a persistent phosphor blend, along with techniques for making and using the blend. The persistent phosphor blend is made of at least one persistent phosphor combined with at least one other phosphor, where the excitation spectra of the one or more other phosphors overlap the emission spectra of the one or more persistent phosphors. The choice of the phosphors used allows the decay time and emission colors to be tuned for the specific application. In another embodiment, the invention provides a method for making persistent phosphor blends with tunable colors. In yet another embodiment, applications for such a persistent phosphor blend are provided.

Abstract: A persistent phosphor of formula I is provided, along with methods for making and using the phosphor: AxAlyO4:Euj,REk,Bm,Znn,Coo,Scp ??I wherein: A is Ba, Sr, Ca, or a combination of these metals; x is greater than about 0.75 and less than about 1.3; y is greater than or equal to about 1.6 and less than or equal to 2; j is greater than about 0.0005 and less than about 0.1; k is greater than about 0.0005 and less than about 0.1; m is greater than or equal to 0 and less than about 0.30; n is greater than 0 and less than about 0.10; o is greater than 0 and less than about 0.01; p is greater than 0 and less than about 0.05; and RE is Dy, Nd, or a combination thereof. Applications for such phosphors include use in toys, emergency equipment, clothing, and instrument panels, among others.

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.

Abstract: Embodiments of the present techniques provide a related family of phosphors that may be used in lighting systems to generate blue or blue-green light. The phosphors include systems having a general formula of: ((Sr1?zMz)1?(x+w)AwCex)3(Al1?ySiy)O4+y+3(x?w)F1?y?3(x?w) (I), wherein 0<x?0.10, 0?y?0.5, 0?z?0.5, 0?w?x, A is Li, Na, K, Rb, or Ag or any combinations thereof, and M is Ca, Ba, Mg, Zn, or Sn or any combinations thereof. Advantageously, phosphors made accordingly to these formulations maintain emission intensity across a wide range of temperatures. The phosphors may be used in lighting systems, such as LEDs and fluorescent tubes, among others, to produce blue and blue/green light. Further, the phosphors may be used in blends with other phosphors, or in combined lighting systems, to produce white light suitable for illumination.

Abstract: The current invention provides a persistent phosphor blend, along with techniques for making and using the blend. The persistent phosphor blend is made of at least one persistent phosphor combined with at least one other phosphor, where the excitation spectra of the one or more other phosphors overlap the emission spectra of the one or more persistent phosphors. The choice of the phosphors used allows the decay time and emission colors to be tuned for the specific application. In another embodiment, the invention provides a method for making persistent phosphor blends with tunable colors. In yet another embodiment, applications for such a persistent phosphor blend are provided.