Compositions comprising at least one polymer and at least one salt, and electroluminescent devices containing said compositions

A composition comprising at least one polymer and at least one salt, wherein the polymer comprises at least one structural unit of formula (I):

• wherein
• Ar1, Ar2 and Ar3
• are the same or different in each instance and are a mono- or polycyclic, aromatic or heteroaromatic ring system optionally substituted by one or more R radicals;
• R is the same or different in each instance and is H, D, F, Cl, Br, I, N(R1)2, CN, NO2, Si(R1)3, B(OR1)2, C(═O)R1, P(═O)(R1)2, S(═O)R1, S(═O)2R1, OSO2R1, a straight-chain alkyl, alkoxy, or thioalkoxy group having 1 to 40 carbon atoms or an alkenyl or alkynyl group having 2 to 40 carbon atoms or a branched or cyclic alkyl, alkoxy or thioalkoxy group having 3 to 40 carbon atoms, each of which is optionally substituted by one or more R1 radicals, wherein one or more nonadjacent CH2 groups is optionally replaced by R1C═CR1, C≡C, Si(R1)2, C═O, C═S, C═NR1, P(═O)(R1), SO, SO2, NR1, O, S, or CONR1 and wherein one or more hydrogen atoms is optionally replaced by D, F, Cl, Br, I, or CN, an aromatic or heteroaromatic ring system which has 5 to 60 aromatic ring atoms and is optionally substituted in each case by one or more R1 radicals, an aryloxy or heteroaryloxy group which has 5 to 60 aromatic ring atoms and is optionally substituted by one or more R1 radicals, an aralkyl or heteroaralkyl group which has 5 to 60 aromatic ring atoms and is optionally substituted by one or more R1 radicals, or a diarylamino group, diheteroarylamino group, or arylheteroarylamino group which has 10 to 40 aromatic ring atoms and is optionally substituted by one or more R1 radicals;
• and wherein two or more R radicals together optionally define a mono- or polycyclic, aliphatic, aromatic and/or benzofused ring system;
• R1 is the same or different in each instance and is H, D, F, or an aliphatic, aromatic and/or heteroaromatic hydrocarbyl radical having 1 to 20 carbon atoms, wherein one or more hydrogen atoms is optionally replaced by F;
• and wherein two or more R1 substituents together optionally define a mono- or polycyclic, aliphatic, or aromatic ring system;
• and
• the dotted lines denote bonds to adjacent structural units in the polymer;
• the salt comprises at least one cation of formulae (K1), (K2), and/or (K3):
• wherein the A1 radical is an element of group 15 of the Periodic Table of the Elements, the A2 radical is an element of group 16 of the Periodic Table of the Elements;
• and A3 is an element of group 17 of the Periodic Table of the Elements;
• the R11, R21, and R31 radicals are any radical;
• the R12, R22, R23, R32, R33, and R34 radicals are each a carbon atom-containing group which binds via a carbon atom in each case to the A1, A2, or A3 radical;
• wherein one or more of the R11 to R34 radicals together optionally define a mono- or polycyclic, aliphatic, heteroaliphatic, heteroaromatic or aromatic ring system;
• and at least one anion of formula (A1):
• wherein the E4 radical is an element of group 13 of the Periodic Table of the Elements;
• and the R41, R42, R43, and R44 radicals are each an aromatic or heteroaromatic ring system which has 5 to 60 aromatic ring atoms and is optionally substituted in each case by one or more R radicals, wherein one or more of the R41, R42, R43, and R44 radicals together optionally define a mono- or polycyclic, aliphatic, heteroaliphatic, heteroaromatic or aromatic ring system.