Organic semiconductors

Organic semiconductors

An optoelectronic device comprising a charge transfer layer including a first semiconductive polymer comprising one or more zwitterions.

Organic semiconductor comprising zwitterions

An optoelectronic device (10 figure 2) comprising a charge transfer layer (14 figure 2) including a first semiconductive polymer comprising one or more zwitterions. The zwitterionic substituent may comprise a quaternary amine group and/or a sulfonate group. The polymer may also comprise a fluorene group repeat unit. Also claimed is a semiconductive polymer having an anionic charge centre separated from a cationic centre by more than two atomic (e.g. carbon) centres. Also claimed is a method of manufacturing a semiconductive polymer comprising reacting a conjugated monomer with a zwitterion. The method may comprise a Suzuki, Yamamoto or Stille polymerisation.

ORGANIC SEMICONDUCTORS

An optoelectronic device comprising a charge transfer layer including a first semiconductive polymer comprising one or more zwitterions. 1. An optoelectronic device comprising a charge transfer layer including a first semiconductive polymer comprising one or more zwitterions.2. An optoelectronic device according to claim 1 , wherein the first semiconductive polymer comprises a first repeat unit having at least one zwitterionic substituent.3. An optoelectronic device according to claim 2 , wherein the zwitterionic substituent comprises at least one quaternary amine group.4. An optoelectronic device according to claim 2 , wherein the zwitterionic substituent comprises a sulfonate group.5. An optoelectronic device according to claim 2 , wherein the zwitterionic substituent comprises a cationic center centre and an anionic center separated by at least 1 claim 2 , atomic center.6. An optoelectronic device according to claim 2 , wherein the first repeat unit comprises a fluorene residue.8. An optoelectronic device according to claim 7 , wherein Rcomprises a second zwitterionic substituent claim 7 , H claim 7 , a Cto Cstraight alkyl chain claim 7 , a Cto Cbranched alkyl chain claim 7 , a Cto Calkenyl chain claim 7 , or a Cto Calkynyl chain.9. An optoelectronic device according to claim 7 , wherein Rand Rcomprise the same zwitterionic substituents.10. An optoelectronic device according claim 2 , wherein the first semiconductive polymer comprises a second repeat unit.11. An optoelectronic device according to claim 10 , wherein the second repeat unit comprises a fluorene residue.12. An optoelectronic device according to claim 10 , wherein the first semiconductive polymer comprises an alternating copolymer of the first repeat unit and the second repeat unit.13. An optoelectronic device according to claim 1 , wherein the charge transfer layer is positioned between a light emissive layer and a cathode.14. An optoelectronic device according to claim 1 , wherein the charge ...

Organic semiconductors

An optoelectronic device comprising a charge transfer layer including a first semiconductive polymer comprising one or more zwitterions.