Silicate phosphor and white light emitting device including the same
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorsTae-gon Kim, Seoung-jae Im, Shunichi Kubota, Young-sic Kim
Life of this patent
Estimating the term…
Abstract
Disclosed is a silicate phosphor represented by Formula: Lia-xAxSrb-y-z-lByEuzClSic-mDmOd-nEn where A includes at least one ion selected from the group consisting of Na, K, Rb, and Cs. B includes at least one ion selected from the group consisting of Mg, Ca, Ba and Zn. C includes at least one ion selected from the group consisting of Sc, Y, La, Gd, Ce, Pr, Nd, Sm, Tb, Dy, Ho, Er, Tm, Yb, Lu and Bi. D includes at least one ion selected from the group consisting of B, Al, Ga, In and Tl. E includes at least one ion selected from the group consisting of F, Cl, Br, and I. Further disclosed is a white light emitting device including the silicate phosphor.
Claims16
A silicate phosphor represented by Formula 1:
- Lia-xAxSrb-y-z-lByEuzClSic-mDmOd-nEn (Formula 1)
- where A comprises at least one ion selected from the group consisting of Na, K, Rb, and Cs;
- B comprises at least one ion selected from the group consisting of Mg, Ca, Ba and Zn;
- C comprises at least one ion selected from the group consisting of Sc, Y, La, Gd, Ce, Pr, Nd, Sm, Tb, Dy, Ho, Er, Tm, Yb, Lu and Bi;
- D comprises at least one ion selected from the group consisting of B, Al, Ga, In and Tl;
- E comprises at least one ion selected from the group consisting of F, Cl, Br, and I;
- where 1.5≦a≦2.5;
- 1.5≦b≦2.5 or b=1;
- 1.5≦c≦2.5 or c=1;
- 3≦d≦5;
- 0≦x<2;
- 0≦y<1;
- 0<z≦0.1;
- 0<l≦0.1;
- and 0<m≦0.1 and 0≦n≦1.
A silicate phosphor represented by the Formula:
- Li2Srl-p-qEupCeqSil-qAlqO4 where 0<p+q≦0.05.
Dependencies are inferred from the claim text.