Patent ID: 7105633

Claim:
A method for preparing an electroluminescent device, said method comprising: (i) providing a conjugated polymer comprising at least about 20 repeat units, which may independently be the same or different, the repeat units represented by formula: wherein Arom is a moiety selected from Formulae (1) and (2): wherein each Ary, which may independently be the same or different, is selected from an aromatic hydrocarbon ring and a C 2+ aromatic heterocyclic ring, wherein the aromatic hydrocarbon ring is selected from fluorenyl, terphenyl, tetraphenyl, pyrenyl, and phenanthryl, and the C 2+ heterocyclic ring is selected from pyrrolyl, furanyl, imidazolyl, triazolyl, isoxazolyl, oxadiazolyl, furazanyl, pyridazinyl, pyrimidyl, pyrazinyl, triazinyl, tetrazinyl, benzofuranyl, benzothiophenyl, indolyl, isoindazolyl, benzimidazolyl, benzotriazolyl, benzoxazolyl, quinolyl, isoquinolyl, cinnolyl, quinazolyl, naphthyridyl, phthalazyl, phentriazyl, benzotetrazyl, carbazolyl, dibenzofuranyl, dibenzothiophenyl, acridyl, and phenazyl; wherein L is selected from an ethynyl group and a substituted or unsubstituted ethenyl group; wherein each R, which may independently be the same or different and which may be unsubstituted or substituted by a substituent selected from cyano, nitro, and halogen, is selected from the group consisting of hydrogen, aryl, alkylaryl, arylalkyl, and alkyl, wherein none or one or more —CH 2 — units of the alkyl are replaced by a moiety selected from —O—, —S—, C 2-14 aryl, and —NR′— wherein each R′, which may independently be the same or different, comprises a C 1-100 saturated acyclic hydrocarbyl group; and wherein each x is the number of hydrogen atoms of Ary capable of substitution by R; (ii) preparing a solution of the polymer in an organic solvent; and (iii) casting the solution onto a substrate, thereby forming a polymer layer on the substrate.