Composition comprising one or more organic semiconducting compounds having a molecular weight of at most 5000 g/mol, and one or more organic solvents, wherein said organic solvent comprises at least 60 % by weight 3,4-dimethylanisole, characterized in that at least one of said organic semiconducting compounds is a compound of the general formula wherein A is a functional structure element, B is a solubilising structure element and k is a integer in the range of 1 to 20, and said solubilising structure element B has the general formula (L-II) wherein Ar b, Ar c each independently are the same or different and each independently represents aryl or heteroaryl group which has from 4 to 60 carbon atoms and may be substituted by one or more arbitrary residues R, X each independently represents N or CR b, preferably CH, R a, R b each independently are the same or different represents hydrogen, a straight chain alkyl, alkoxy or thioalkoxy group having 1 to 40 carbon atoms or a branched or cyclic alkyl, alkoxy or thioalkoxy group having 3 to 40 carbon atoms, especially an optionally substituted C 7 -C 40 alkylaryloxy group; an optionally substituted C 2 -C 40 alkoxycarbonyl group; an optionally substituted C 7 -C 40 aryloxycarbonyl group; a cyano group (-CN); a carbamoyl group (-C(=O)NH 2); a haloformyl group (-C(=O)-X, wherein X represents a halogen atom); a formyl group (-C(=O)-H); an isocyano group; an isocyanate group; a thiocyanate group or a thioisocyanate group; an optionally substituted amino group; a hydroxy group; a nitro group; a CF 3 group; a halo group (Cl, Br, F); or an optionally substituted silyl or alkynylsilyl group; or a curable group or a substituted or unsubstituted aromatic or hetero aromatic ring system having 5 to 60 ring atoms, or a aryloxy or heteroaryloxy group having 5 to 60 ring atoms, or a combination thereof, wherein one or more of these groups R a and/or R b may form a mono or polycyclic aliphatic or aromatic ring system together and/or the ring to which the group R a is bound;and I is 0, 1, 2, 3 or 4; wherein the dotted bond represents the bond to the functional structural element A. A is a functional structure element, B is a solubilising structure element and k is a integer in the range of 1 to 20, Ar b, Ar c each independently are the same or different and each independently represents aryl or heteroaryl group which has from 4 to 60 carbon atoms and may be substituted by one or more arbitrary residues R, X each independently represents N or CR b, preferably CH, R a, R b each independently are the same or different represents hydrogen, a straight chain alkyl, alkoxy or thioalkoxy group having 1 to 40 carbon atoms or a branched or cyclic alkyl, alkoxy or thioalkoxy group having 3 to 40 carbon atoms, especially an optionally substituted C 7 -C 40 alkylaryloxy group; an optionally substituted C 2 -C 40 alkoxycarbonyl group; an optionally substituted C 7 -C 40 aryloxycarbonyl group; a cyano group (-CN); a carbamoyl group (-C(=O)NH 2); a haloformyl group (-C(=O)-X, wherein X represents a halogen atom); a formyl group (-C(=O)-H); an isocyano group; an isocyanate group; a thiocyanate group or a thioisocyanate group; an optionally substituted amino group; a hydroxy group; a nitro group; a CF 3 group; a halo group (Cl, Br, F); or an optionally substituted silyl or alkynylsilyl group; or a curable group or a substituted or unsubstituted aromatic or hetero aromatic ring system having 5 to 60 ring atoms, or a aryloxy or heteroaryloxy group having 5 to 60 ring atoms, or a combination thereof, wherein one or more of these groups R a and/or R b may form a mono or polycyclic aliphatic or aromatic ring system together and/or the ring to which the group R a is bound;and I is 0, 1, 2, 3 or 4;