Halosilicate phosphor and white light emitting device including the same
AssigneesSamsung Electronics Co., Ltd., Samsung Electro-Mechanics Co., Ltd.
InventorsTae-gon Kim, Shunichi Kubota, Young-sic Kim, Seoung-jae Im
Life of this patent
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Abstract
A halosilicate phosphor represented by Formula 1 p(Ca1-xM1x)O.qM2O2.rM3A2:sM4 wherein M1 includes at least one selected from a group consisting of Sr2+ and Ba2+; M2 includes at least one selected from a group consisting of Si4+ and Ge4+; M3 includes at least one selected from a group consisting of Ca2+, Sr2+ and Ba2+; M4 includes at least one selected from a group consisting of Eu2+, Mn2+, Sb2+, Ce3+, Pr3+, Nd3+, Sm3+, Tb3+, Dy3+, Ho3+, Er3+, Yb3+ and Bi3+; A includes at least one selected from a group consisting of F−, Cl−, Br− and I−; and wherein 0≦x<1, 1.8≦p≦2.2, 0.8≦q≦1.2, 1<r/q<3 and 0<s<0.5.
Claims9
A halosilicate phosphor represented by Formula 1:
- p(Ca1-xM1x)O.qM2O2.rM3A2:sM4 Formula 1
- wherein
- M1 comprises at least one selected from a group consisting of Sr2+ and Ba2+;
- M2 comprises at least one selected from a group consisting of Si4+ and Ge4+;
- M3 comprises at least one selected from a group consisting of Ca2+, Sr2+ and Ba2+;
- M4 comprises at least one selected from a group consisting of Eu2+, Mn2+, Sb2+, Ce3+, Pr3+, Nd3+, Sm3+, Tb3+, Dy3+, Ho3+, Er3+, Yb3+ and Bi3+;
- and
- A comprises at least one selected from a group consisting of F−, Cl−, Br− and I−,
- wherein 0≦x<1, 1.8≦p≦2.2, 0.8≦q≦1.2, 1<r/q<3 and 0<s<0.5, and
- wherein the halosilicate phosphor has a full width at half maximum of about 125 nm to about 220 nm in an emission spectra.
A white light emitting device comprising a light emitting diode and a halosilicate phosphor represented by Formula 1:
- p(Ca1-xM1x)O.qM2O2.rM3A2:sM4 Formula 1
- wherein
- M1 comprises at least one selected from a group consisting of Sr2+ and Ba2+;
- M2 comprises at least one selected from a group consisting of Si4+ and Ge4+;
- M3 comprises at least one selected from a group consisting of Ca2+, Sr2+ and Ba2+;
- M4 comprises at least one selected from a group consisting of Eu2+, Mn2+, Sb2+, Ce3+, Pr3+, Nd3+, Sm3+, Tb3+, Dy3+, Ho3+, Er3+;
- Yb3+ and Bi3+;
- A comprises at least one selected from a group consisting of F−, Cl−, Br− and I−;
- 0≦x<1, 1.8≦p≦2.2, 0.8≦q≦1.2, 1<r/q<3 and 0<s<0.5 and wherein the halosilicate phosphor has a full width at half maximum of about 125 nm to about 220 nm in an emission spectra.
Dependencies are inferred from the claim text.