# US 10,483,441 B2 · Phosphor containing particle, and light emitting device and phosphor containing sheet 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 10,483,441 B2 - Document ID: US10483441B2 - Status: Granted - Kind: B2 - Application number: 15/981,941 - Filed: 2018-05-17 - Published: 2018-12-13 - Granted: 2019-11-19 - Earliest claimed: 2017-06-09 - Assignees: Sharp Kabushiki Kaisha - Applicants: Sharp Kabushiki Kaisha - Inventors: Tatsuya Ryohwa; Kanako Nakata; Hiroshi Fukunaga; Makoto Izumi - Web page: https://patentgrep.com/patent/US10483441B2 ## CPC - H10H 20/8513: {having two or more wavelength conversion materials} - C09K 11/08: containing inorganic luminescent materials - H10H 20/8512: {Wavelength conversion materials} - H10H 20/8514: {characterised by their shape, e.g. plate or foil} - H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS - C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE ## Abstract A phosphor containing particle including a core portion which is a particulate matter of resin including a constitutional unit derived from an ionic liquid with a semiconductor nanoparticle phosphor dispersed therein and a shell portion which is a matter in a form of a layer of resin which includes a constitutional unit derived from an ionic liquid and coats at least a portion of the core portion, and a phosphor containing particle including a particulate matter of resin including a constitutional unit derived from an ionic liquid with a semiconductor nanoparticle phosphor dispersed therein and a metal oxide layer coating at least a portion of the particulate matter of resin. A light emitting device including a light source and a wavelength converter in which phosphor containing particles are dispersed in a translucent medium, and a phosphor containing sheet in which phosphor containing particles are dispersed in a sheet-shaped translucent medium. ## Claims ### Claim 1 A phosphor containing particle comprising: a core portion which is a particulate matter of resin including a constitutional unit derived from an ionic liquid with a semiconductor nanoparticle phosphor dispersed therein; and a shell portion which is a matter in a form of a layer of resin which includes a constitutional unit derived from an ionic liquid and coats at least a portion of the core portion, wherein the ionic liquids included in the core portion and the shell portion are selected from a group consisting of 2-(methacryloyloxy)-ethyltrimethyl ammonium bis(trifluoromethane sulfonyl) imide, 1-(3-acryloyloxy-propyl)-3-methylimidazolium bis(trifluoromethanesulfonyl)imide, N,N,N-trimethyl-N-propylammonium bis(trifluoromethanesulfonyl) imide, and N,N-dimethyl-N-methyl-2-(2-methoxy ethyl) ammonium bis(trifluoromethanesulfonyl) imide. ### Claim 2 (depends on 1) The phosphor containing particle according to claim 1, wherein the shell portion does not include the semiconductor nanoparticle phosphor. ### Claim 3 (depends on 1) The phosphor containing particle according to claim 1, wherein the shell portion covers an entire surface of the core portion. ### Claim 4 (depends on 1) The phosphor containing particle according to claim 1, wherein the resin in the core portion and the resin in the shell portion are identical in type. ### Claim 5 (depends on 1) The phosphor containing particle according to claim 1, wherein the resin in the core portion and the resin in the shell portion are different in type. ### Claim 6 (depends on 1) The phosphor containing particle according to claim 1, wherein at least one of the resin in the core portion and the resin in the shell portion is a resin including a constitutional unit derived from an ionic liquid having a polymerizable functional group. ### Claim 7 (depends on 6) The phosphor containing particle according to claim 6, wherein the resin in the core portion and the resin in the shell portion are both a resin including a constitutional unit derived from an ionic liquid having a (meth)acrylic acid ester group as the polymerizable functional group. ### Claim 8 (depends on 6) The phosphor containing particle according to claim 6, wherein the resin in the shell portion contains a cross-linking agent at a mixing ratio larger than that of the cross-linking agent contained by the resin in the core portion. ### Claim 9 (depends on 8) The phosphor containing particle according to claim 8, wherein the cross-linking agent contained by the resin in the shell portion has a weight ratio of more than 50% with respect to the entire resin, and the cross-linking agent contained by the resin in the core portion has a weight ratio of 50% or less with respect to the entire resin. ### Claim 10 (depends on 1) The phosphor containing particle according to claim 1, having a particle size of about 100 nm or more and about 30 μm or less. ### Claim 11 (depends on 1) The phosphor containing particle according to claim 1, wherein the shell portion has a thickness of about 0.1 μm or more and about 5 μm or less. ### Claim 12 (depends on 1) A light emitting device comprising a light source and a wavelength converter in which phosphor containing particles according to claim 1 are dispersed in a translucent medium. ### Claim 13 (depends on 12) The light emitting device according to claim 12, including a phosphor containing particle in which in the core portion a red fluorescent light emitting semiconductor nanoparticle phosphor is dispersed in a resin including a constitutional unit derived from an ionic liquid and a phosphor containing particle in which in the core portion a green fluorescent light emitting semiconductor nanoparticle phosphor is dispersed in a resin including a constitutional unit derived from an ionic liquid. ### Claim 14 (depends on 1) A phosphor containing sheet in which phosphor containing particles according to claim 1 are dispersed in a sheet-shaped translucent medium.