Fluorene containing copolymer used in light emitting devices
US9676900B2 · kind B2 · utility
2Cited by
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11Claims
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Key dates
| Filing date | Jan 31, 2012 |
| Grant date | Jun 13, 2017 |
| Priority date | — |
| Expiry date | May 30, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K50/15
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A polymer comprising a repeat unit of formula (I): (I) wherein Ar6 and Ar7 each independently represent a substituted or unsubstituted aryl or heteroaryl group; Sp represents a spacer group comprising a chain of at least 2 aliphatic carbon atoms spacing Ar6 from Ar7; m is at least 1; and if m is greater than 1 then —(Ar7)m forms a linear or branched chain of Ar7 groups in which Ar7 in each occurrence may be the same or different.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.