# US 7,608,202 B2 · Phosphor and light emitting device using the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,608,202 B2 - Document ID: US7608202B2 - Status: Granted - Kind: B2 - Application number: 11/700,763 - Filed: 2007-02-01 - Published: 2007-08-30 - Granted: 2009-10-27 - Earliest claimed: 2006-02-02 - Assignees: Nichia Corporation - Inventors: Yoshinori Murazaki - Web page: https://patentgrep.com/patent/US7608202B2 ## CPC - C09K 11/77342: {Silicates} - C09K 11/7758: {Aluminates; Silicates} - C09K 11/7764: {Aluminates; Silicates} - C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE ## Abstract There is provided a phosphor emitting light of high brightness and having high weatherability, which has a composition represented by the following general formula: (M11−yRy)aMgM2bM3cOa+2b+(3/2)cX2 wherein M1 is at least one element selected from the group consisting of Ca, Sr, Ba, Zn and Mn, M2 is at least one element selected from the group consisting of Si, Ge and Sn, M3 is at least one element selected from the group consisting of B, Al, Ga and In, X is at least one element selected from the group consisting of F, Cl, Br and I, R is at least one element selected from the group consisting of rare earth elements with Eu being an inevitable element, and y, a, b and c satisfy the following relationships of 0.0001≦y≦0.3, 7.0≦a<10.0, 3.0≦b<5.0 and 0≦c<1.0. ## Claims ### Claim 1 A phosphor having a composition represented by the following general formula: (M11−yRy)aMgM2bM3cOa+2b+(3/2)cX2 wherein M1 is at least one element selected from the group consisting of Ca, Sr, Ba, Zn and Mn, M2 is at least one element selected from the group consisting of Si, Ge and Sn, M3 is at least one element selected from the group consisting of B, Al, Ga and In, X is at least one element selected from the group consisting of F, Cl, Br and I, R is at least one element selected from the group consisting of rare earth elements with Eu being inevitable element, and y, a, b and c satisfy the following relationships of 0.0001≦y≦0.3, 8.5≦a<9.5, 3.0≦b<5.0 and 0≦c<1.0. ### Claim 2 A light emitting device comprising a light source and a phosphor which is excited by light emitted from the light source and has a composition represented by the following general formula: (M11−yRy)aMgM2bM3cOa+2b+(3/2)cX2 wherein M1 is at least one element selected from the group consisting of Ca, Sr, Ba, Zn and Mn, M2 is at least one element selected from the group consisting of Si, Ge and Sn, M3 is at least one element selected from the group consisting of B, Al, Ga and In, X is at least one element selected from the group consisting of F, Cl, Br and I, R is at least one element selected from the group consisting of rare earth elements with Eu being inevitable element, and y, a, b and c satisfy the following relationships of 0.0001≦y≦0.3, 8.5≦a<9.5, 3.0≦b<5.0 and 0≦c<1.0. ### Claim 3 (depends on 1) The phosphor as recited in claim 1, wherein the phosphor includes Si and a portion of Si is substituted with Ge and/or Sn. ### Claim 4 (depends on 1) The phosphor as recited in claim 1, wherein the phosphor includes Cl and a portion of Cl is substituted with at least one of F, Br and I. ### Claim 5 (depends on 1) The phosphor as recited in claim 1, wherein the phosphor includes Eu and a portion of Eu is substituted with at least one element selected from the group consisting of Pr, Nd, Sm, Tb, Dy, Ho, Er, Tm and/or Yb. ### Claim 6 (depends on 1) The phosphor as recited in claim 1, wherein the phosphor includes Ca and proportions of Ca:Eu of 8.425:0.075 to 8.10:0.40 in molar ratio are employed. ### Claim 7 (depends on 1) The phosphor as recited in claim 1, wherein the phosphor includes Ca and Mn as essential elements. ### Claim 8 (depends on 7) The phosphor as recited in claim 7, wherein the amount of Mn is in a range of 0.30 to 0.50 in molar ratio. ### Claim 9 (depends on 7) The phosphor as recited in claim 7, wherein emission of the phosphor has a chromaticity coordinate in a pentagonal area defined by following five chromaticity coordinates x/y=0.377/0.583, x/y=0.383/0.589, x/y=0.389/0.586, x/y=0.400/0.577 and x/y=0.395/0.575. ### Claim 10 (depends on 2) The light emitting device as recited in claim 2, wherein the light emitting device has a peak of emission at a wavelength in a range from 240 nm to 520 nm. ### Claim 11 (depends on 2) The light emitting device as recited in claim 2, wherein the light emitting device has a peak of emission at a wavelength in a range from 320 nm to 480 nm. ### Claim 12 (depends on 2) The light emitting device as recited in claim 2, wherein the phosphor includes Si and a portion of Si is substituted with Ge and/or Sn. ### Claim 13 (depends on 2) The light emitting device as recited in claim 2, wherein the phosphor includes Cl and a portion of Cl is substituted with at least one of F, Br and I. ### Claim 14 (depends on 2) The light emitting device as recited in claim 2, wherein the phosphor includes Eu and a portion of Eu is substituted with at least one element selected from the group consisting of Pr, Nd, Sm, Tb, Dy, Ho, Er, Tm and/or Yb. ### Claim 15 (depends on 2) The light emitting device as recited in claim 2, wherein the phosphor includes Ca and proportions of Ca:Eu of 8.425:0.075 to 8.10:0.40 in molar ratio are employed. ### Claim 16 (depends on 2) The light emitting device as recited in claim 2, wherein the phosphor includes Ca and Mn as essential elements. ### Claim 17 (depends on 16) The light emitting device as recited in claim 16, wherein the amount of Mn is in a range of 0.30 to 0.50 in molar ratio. ### Claim 18 (depends on 17) The light emitting device as recited in claim 17, wherein emission of the phosphor has a chromaticity coordinate in a pentagonal area defined by following five chromaticity coordinates x/y=0.377/0.583, x/y=0.383/0.589, x/y=0.389/0.586, x/y=0.400/0.577 and x/y=0.395/0.575. ### Claim 19 A phosphor having a composition represented by the following general formula: (M11−yRy)aMgM2bM3cOa+2b+(3/2)cX2 wherein M1 is at least one element selected from the group consisting of Ca, Sr, Ba, Zn and Mn, M2 is at least one element selected from the group consisting of Si, Ge and Sn, M3 is at least one element selected from the group consisting of B, Al, Ga and In, X is at least one element selected from the group consisting of rare earth elements with Eu being inevitable element, and y, a, b and c satisfy the following relationships of 0.0001≦y≦0.3, a=7.5, 3.0