# US 2016/0240785 A1 · Organic light-emitting polymerand device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2016/0240785 A1 - Document ID: US20160240785A1 - Status: Published application - Kind: A1 - Application number: 15/045,327 - Filed: 2016-02-17 - Published: 2016-08-18 - Earliest claimed: 2015-02-18 - Assignees: Cambridge Display Technology Limited; Sumitomo Chemical Company, Limited - Applicants: Cambridge Display Technology Limited; Sumitomo Chemical Company Limited - Inventors: Michael Cass; Matthew Roberts; Florence Bourcet; Andrey Nikolaenko - Web page: https://patentgrep.com/patent/US20160240785A1 ## CPC - H10K 85/111: {comprising aromatic, heteroaromatic, or aryl chains, e.g. polyaniline, polyphenylene or polyphenylene vinylene} - 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} - C09K 11/06: containing organic luminescent materials - H10K 85/151: {Copolymers} - C08G 2261/12: Copolymers - C08G 2261/1412: Saturated aliphatic units - C08G 2261/148: Side-chains having aromatic units - C08G 2261/312: Non-condensed aromatic systems, e.g. benzene - C08G 2261/3142: fluorene-based, e.g. fluorene, indenofluorene, or spirobifluorene - C08G 2261/3162: Arylamines - C08G 2261/3221: containing one or more nitrogen atoms as the only heteroatom, e.g. pyrrole, pyridine or triazole - C08G 2261/3245: containing nitrogen and oxygen as heteroatoms - C08G 2261/3424: non-conjugated, e.g. paracyclophanes or xylenes - C08G 2261/411: Suzuki reactions - C08G 2261/522: fluorescent - C08G 2261/524: phosphorescent - C08G 2261/95: Use in organic luminescent diodes - C09K 2211/1433: bridged by heteroatoms, e.g. N, P, Si or B - C09K 2211/1466: containing nitrogen as the only heteroatom - C09K 2211/1475: containing nitrogen and oxygen as heteroatoms - H10K 50/11: characterised by the electroluminescent [EL] layers - H10K 85/1135: {Polyethylene dioxythiophene [PEDOT]; Derivatives thereof} - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES - C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS - C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE ## Abstract A polymer comprising a fluorescent light-emitting repeating unit comprising a group of formula ED-EA wherein ED is an electron-donating unit; EA is an electron-accepting unit; and a band gap EgCT of a charge-transfer state formed from the electron-donating unit and the electron-accepting unit is smaller than the bandgap of either the electron-accepting unit EgEA or that of the electron-donating unit EgED. ## Claims ### Claim 1 A polymer comprising a fluorescent light-emitting repeating unit comprising a group of formula ED-EA wherein ED is an electron-donating unit; EA is an electron-accepting unit; and a band gap EgCT of a charge-transfer state formed from the electron-donating unit and the electron-accepting unit is smaller than the bandgap of either the electron-accepting unit EgEA or that of the electron-donating unit EgED. ### Claim 2 (depends on 1) A polymer according to claim 1 wherein the light-emitting repeating unit has formula EA-ED-EA. ### Claim 3 (depends on 1) A polymer according to claim 1 wherein ED has a HOMO value of no more than 6 eV from vacuum level. ### Claim 4 (depends on 1) A polymer according to claim 1 wherein ED has formula (V): wherein Ar7, Ar8 and Ar9 in each occurrence are independently selected from substituted or unsubstituted aryl or heteroaryl; g is 0 or a positive integer; and each R13 independently is a substituent. ### Claim 5 (depends on 4) A polymer according to claim 4 wherein R13 is Ar10 wherein Ar10 is a substituted or unsubstituted aryl or heteroaryl group. ### Claim 6 (depends on 4) A polymer according to claim 4 wherein any of Ar7, Ar8, Ar9 and Ar10 bound directly to a N atom in the repeat unit of formula (V) may be linked by a direct bond or a divalent linking atom or group to another of Ar7, Ar8, Ar9 and Ar10 bound directly to the same N atom. ### Claim 7 (depends on 1) A polymer according to claim 1 wherein EA has a LUMO value of at least 2.2 eV from vacuum level. ### Claim 8 (depends on 1) A polymer according to claim 1 wherein EA has formula (I): —(Ar1—Het-Ar1)— (I) wherein Ar1 in each occurrence is independently an aryl group, Het is a heteroaryl group containing at least one nitrogen atom and Ar1 and Het may each independently be unsubstituted or substituted with one or more substituents. ### Claim 9 (depends on 1) A polymer according to claim 1 wherein the light-emitting repeat unit is in the polymer backbone. ### Claim 10 (depends on 1) A polymer according to claim 1 wherein the polymer comprises one or more repeat units for limiting or breaking conjugation along the polymer backbone. ### Claim 11 (depends on 1) A polymer according to claim 1 wherein the polymer further comprises one or more arylene repeat units. ### Claim 12 (depends on 1) A polymer according to claim 1 wherein the polymer further comprises repeat units of formula EA that are not adjacent to units of formula ED, and/or repeat units of formula ED that are not adjacent to units of formula EA. ### Claim 13 (depends on 1) A method of forming a polymer according to claim 1 comprising the steps of polymerising a first monomer comprising the electron-donating unit ED and a second monomer comprising the electron-accepting unit EA. ### Claim 14 (depends on 13) A method according to claim 13 wherein one of the first and second monomers is substituted with two leaving groups selected from halogen, sulfonic acid and sulfonic acid esters, and the other of the first and second monomers is substituted with two leaving groups selected from boronic acid and esters thereof. ### Claim 15 (depends on 1) An organic light-emitting device comprising an anode, a cathode and a light-emitting layer comprising a polymer according to claim 1 between the anode and the cathode.