Materials for electronic devices

A compound of a formula (I)

• where:
• Cbz is a carbazole group, which is optionally substituted by one or more radicals R1, and which is bonded via the carbazole nitrogen atom;
• Ar1 is on each occurrence, identically or differently, an aryl or heteroaryl group having 6 to 14 aromatic ring atoms, which is optionally substituted by one or more radicals R2, where individual groups Ar1 is optionally connected to one another via radicals R2;
• Ar2 is on each occurrence, identically or differently, an aromatic or heteroaromatic ring system having 6 to 30 aromatic ring atoms, which is optionally substituted by one or more radicals R2;
• R1 and R2 is on each occurrence, identically or differently, H, D, F, Cl, Br, I, C(═O)R3, CN, Si(R3)3, P(═O)(R3)2, S(═O)R3, S(═O)2R3, a straight-chain alkyl or alkoxy group having 1 to 20 C atoms or a branched or cyclic alkyl or alkoxy group having 3 to 20 C atoms or an alkenyl or alkynyl group having 2 to 20 C atoms, where the above-mentioned groups may each be substituted by one or more radicals R3 and where one or more CH2 groups in the above-mentioned groups is optionally replaced by —R3C═CR3—, —C≡C—, Si(R3)2, C═O, C═S, C═NR3, —C(═O)O—, —C(═O)NR3—, NR3, P(═O)(R3), —O—, —S—, SO or SO2 and where one or more H atoms in the above-mentioned groups is optionally replaced by D, F, Cl, Br, I or CN, or an aromatic or heteroaromatic ring system having 5 to 30 aromatic ring atoms, which may in each case be substituted by one or more radicals R3, or an aryloxy or heteroaryloxy group having 5 to 30 aromatic ring atoms, which is optionally substituted by one or more radicals R3, where two or more radicals R1 or R2 is optionally linked to one another and may form a ring;
• R3 is on each occurrence, identically or differently, H, D, F, Cl, Br, I, C(═O)R4, CN, Si(R4)3, N(R4)2, P(═O)(R4)2, S(═O)R4, S(═O)2R4, a straight-chain alkyl or alkoxy group having 1 to 20 C atoms or a branched or cyclic alkyl or alkoxy group having 3 to 20 C atoms or an alkenyl or alkynyl group having 2 to 20 C atoms, where the above-mentioned groups may each be substituted by one or more radicals R4 and where one or more CH2 groups in the above-mentioned groups is optionally replaced by —R4C—CR4—, —C≡C—, Si(R4)2, C═O, C═NR4, —C(═O)O—, —C(═O)NR4—, NR4, P(═O)(R4), —O—, —S—, SO or SO2 and where one or more H atoms in the above-mentioned groups is optionally replaced by D, F, Cl, Br, I or CN, or an aromatic or heteroaromatic ring system having 5 to 30 aromatic ring atoms, which may in each case be substituted by one or more radicals R4, or an aryloxy or heteroaryloxy group having 5 to 30 aromatic ring atoms, which is optionally substituted by one or more radicals R4, where two or more radicals R3 is optionally linked to one another and may form a ring;
• R4 is on each occurrence, identically or differently, H, D, F or an aliphatic, aromatic or heteroaromatic organic radical having 1 to 20 C atoms, in which, in addition, one or more H atoms is optionally replaced by D or F;
• two or more substituents R4 here is optionally linked to one another and may form a ring;
• n is 3, 4, 5 or 6;
• where the compound of the formula (I) contains no further carbazole group besides the group Cbz.