Composition comprising polymeric organic semiconducting compounds

A composition comprising one or more organic semiconducting compounds (OSC) having a molecular weight of at least 10,000 g/mol, and one or more organic solvents, wherein said organic solvent comprises a mono- or di(C1-C5-alkyl)anisole, wherein said semiconducting compound (OSC) having a molecular weight of at least 10,000 g/mol contains at least one structural unit selected from the group consisting of triarylamine, benzidine, tetraaryl-para-phenylenediamine, triarylphosphine, phenothiazine, phenoxazine, dihydrophenazine, thianthrene, dibenzo-para-dioxin, phenoxathiyne, carbazole, azulene, thiophene, pyrrole and furan derivatives and further O, S or N containing heterocycles having an HOMO in the polymer of greater than −5.8 eV, or wherein said semiconducting compound (OSC) having a molecular weight of at least 10,000 g/mol contains at least one structural unit selected from the group consisting of pyridine, pyrimidine, pyridazine, pyrazine, oxadiazole, quinoline, quinoxaline, anthracene, benzanthracene, pyrene, perylene, benzimidazole, triazine, ketone, phosphine oxide, phenazine derivatives, and triarylboranes and further O, S or N containing heterocycles having an LUMO of less than −1.9 eV, or wherein said semiconducting compound (OSC) having a molecular weight of at least 10,000 g/mol contains at least one structural unit selected from the group consisting of 4,5-dihydropyrene, 4,5,9,10-tetrahydropyrene, fluorene, 9,9′-spirobifluorene, phenanthrene, 9,10-dihydro-phenanthrene, 5,7-dihydrodibenzoxepine, cis- and trans-indenofluorene and derivatives thereof, and wherein the composition comprises a viscosity at 25° C. in the range of 1.0 to 100 mPas.