# US 2010/0165604 A1 · White organic electroluminescent device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2010/0165604 A1 - Document ID: US20100165604A1 - Status: Published application - Kind: A1 - Application number: 12/095,337 - Filed: 2006-11-29 - Published: 2010-07-01 - Earliest claimed: 2005-11-30 - Assignees: Sumitomo Chemical Company, Limited - Inventors: Yasunori Uetani - Web page: https://patentgrep.com/patent/US20100165604A1 ## CPC - C09K 11/06: containing organic luminescent materials - C08G 61/02: Macromolecular compounds containing only carbon atoms in the main chain of the macromolecule, e.g. polyxylylenes - C08G 61/12: Macromolecular compounds containing atoms other than carbon in the main chain of the macromolecule - C08G 61/122: {derived from five- or six-membered heterocyclic compounds, other than imides} - C08G 61/123: {derived from five-membered heterocyclic compounds} - H05B 33/14: characterised by the chemical or physical composition or the arrangement of the electroluminescent material {, or by the simultaneous addition of the electroluminescent material in or onto the light source} - H10K 50/125: specially adapted for multicolour light emission, e.g. for emitting white light - H10K 85/151: {Copolymers} - C09K 2211/1416: Condensed systems - C09K 2211/145: containing oxygen as the only heteroatom - C09K 2211/1458: containing sulfur as the only heteroatom - C09K 2211/1466: containing nitrogen as the only heteroatom - C09K 2211/1483: containing nitrogen and sulfur as heteroatoms - C09K 2211/1491: containing other combinations of heteroatoms - H10K 85/113: {Heteroaromatic compounds comprising sulfur or selene, e.g. polythiophene} - H10K 85/115: {Polyfluorene; Derivatives thereof} - H10K 85/342: {comprising iridium} - H10K 85/346: {comprising platinum} - H10K 85/351: {Metal complexes comprising lanthanides or actinides, e.g. comprising europium} - Y02B 20/00: Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps - C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE - C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES - Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS ## Abstract Disclosed is a white polymer organic electroluminescent device having excellent device characteristics such as efficiency. Specifically disclosed is a white organic electroluminescent device containing a polymer material as an electron-transporting material or a light-emitting material, wherein at least two light-emitting layers emitting light of different colors are laminated and at least one of the light-emitting layers is a crosslinked light-emitting layer. The white organic electroluminescent device is further characterized by emitting a white light as a whole. Preferably, at least one of the crosslinked light-emitting layers and at least one of the non-crosslinked light-emitting layers are in contact with each other in the white organic electroluminescent device. ## Claims ### Claim 1 A white organic electroluminescent device which comprises a laminate of at least two light-emitting layers emitting light of different colors and containing a polymer material as a charge-transporting material or a light-emitting material, at least one of the light-emitting layers being a crosslinked light-emitting layer, and which emits a white light as a whole. ### Claim 2 (depends on 1) A white organic electroluminescent device according to claim 1, wherein at least one of the crosslinked light-emitting layers and at least one of the non-crosslinked light-emitting layers are in contact with each other. ### Claim 3 (depends on 1) A device according to claim 1 which is obtained by a method including steps of forming a crosslinkable light-emitting layer by coating, crosslinking the light-emitting layer, and then laminating other light-emitting layer on the crosslinked light-emitting layer. ### Claim 4 (depends on 1) A device according to claim 1, wherein the crosslinking is carried out with a crosslinking agent and the crosslinking agent contains no aromatic ring. ### Claim 5 (depends on 1) A device according to claim 1, wherein the crosslinking agent has a group selected from a group consisting of vinyl group, acetylene group, butenyl group, acryl group, acrylate group, acrylamide group, methacryl group, methacrylate group, methacrylamide group, vinyl ether group, vinylamino group, silanol group, cyclopropyl group, cyclobutyl group, epoxy group, oxetane group, diketene group, episulfide group, lactone group and lactam group. ### Claim 6 (depends on 1) A device according claim 1, wherein the crosslinking agent is a (meth)acrylate. ### Claim 7 (depends on 6) A device according to claim 6, wherein the crosslinking agent is a (meth)acrylate of an aliphatic alcohol. ### Claim 8 (depends on 6) A device according to claim 6, wherein the crosslinking agent is a bi- or higher-functional (meth)acrylate. ### Claim 9 (depends on 8) A device according to claim 8, wherein the crosslinking agent is dipentaerythritol penta- or hexa-acrylate. ### Claim 10 (depends on 1) A device according claim 1, wherein the polymer material is a conjugated polymer compound. ### Claim 11 (depends on 1) A device according claim 1, wherein the polymer material has a repeating unit derived from an aromatic amine. ### Claim 12 (depends on 1) A device according claim 1, wherein the colors of lights emitted from at least two light-emitting layers are red and blue. ### Claim 13 (depends on 1) A planar light source using the device of claim 1. ### Claim 14 (depends on 1) A segment display apparatus using the device of claim 1. ### Claim 15 (depends on 1) A dot matrix display apparatus using the device of claim 1 as a back light. ### Claim 16 (depends on 1) A liquid crystal display apparatus using the device of claim 1 as a back light. ### Claim 17 Use of at least two polymer materials as a charge-transporting material or a light-emitting material which emit light of different colors, at least one of which is crosslinkable, and which emit a white light as a whole in a white organic electroluminescent device.