US9574049B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9574049-B2 |
| Application number | US-54892904-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 19, 2004 |
| Priority date | Mar 20, 2003 |
| Publication date | Feb 21, 2017 |
| Grant date | Feb 21, 2017 |
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A polymer comprising a first repeat unit of formula (I), wherein each Ar is independently selected from optionally substituted aryl or heteroaryl and the group of formula (I) is present in a molar ratio of less than or equal to 10%, and, optionally, a second, optionally substituted repeat unit having a single nitrogen atom in its backbone of formula —Ar—N(Ar)—Ar— in a molar ratio of no greater than 5%.
Opening claim text (preview).
The invention claimed is: 1. An optical device comprising an anode, a cathode and a terpolymer located between the anode and cathode, the terpolymer comprising an optionally substituted repeat unit of formula (II): wherein each R is independently selected from hydrogen, alkyl, and alkoxy and the group of formula(II) is present in a molar ratio of 2.5% to 5%, and there are no repeat units comprising nitrogen atoms in the repeat unit backbone other than the repeat unit of formula (II), the terpolymer further comprising a first repeat unit selected from the group consisting of optionally substituted 9,9-dialkyl-2,7-fluorenyl and 9,9-dialkoxy-2,7-fluorenyl and less than 50 mol % of a second repeat unit selected from the group consisting of optionally substituted repeat units of formula (III): wherein each R 1 is aryl. 2. An optical device according to claim 1 wherein the cathode comprises a layer comprising barium. 3. An optical device according to claim 2 wherein the cathode comprises a layer comprising elemental barium. 4. An optical device according to claim 1 that is an electroluminescent device. 5. An optical device according to claim 1 that is capable of electroluminescence in the wavelength range 400-500 nm. 6. An optical device according to claim 1 wherein the terpolymer is not a component of a blend. 7. An optical device according to claim 1 that is a full color electroluminescent device comprising red, green and blue electroluminescent materials. 8. An optical device according to claim 7 wherein the blue electroluminescent material is said terpolymer. 9. An optical device according to claim 1 that is capable of electroluminescence in the wavelength range 430-500 nm.
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} · CPC title
Electricity · mapped topic
Macromolecular compounds containing only carbon atoms in the main chain of the macromolecule, e.g. polyxylylenes · CPC title
Electricity · mapped topic
bridged by heteroatoms, e.g. N, P, Si or B · CPC title
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