Materials for organic electroluminescent devices

An organic electroluminescent device comprising a cathode, an anode, one or more hole-injection layers, one or more hole-transport layers, one or more exciton-blocking layers and at least one emitting layer, where the compound of formula (1A-1) is employed as a hole-transport material in an exciton-blocking layer, which is directly adjacent to an emitting layer on the anode side;

• wherein
• E1, E2 are identically or differently on each occurrence, selected from C(R0)2,
• R, R0 stand on each occurrence, identically or differently, for H, D, F, Cl, Br, I, CHO, CN, C(═O)Ar3, P(═O)(Ar3)2, S(═O)Ar3, S(═O)2Ar3, N(Ar3)2, NO2, Si(R1)3, B(OR1)2, OSO2R1, a straight-chain alkyl, alkoxy or thioalkyl groups having 1 to 40 C atoms or branched or a cyclic alkyl, alkoxy or thioalkyl groups having 3 to 40 C atoms, each of which may be substituted by one or more radicals R1, where in each case one or more non-adjacent CH2 groups may be replaced by R1C═CR1, C═C, Si(R1)2, Ge(R1)2, Sn(R1)2, C═O, C═S, C═Se, P(═O)(R1), SO, SO2, O, S or CONR1 and where one or more H atoms may be replaced by D, F, Cl, Br, I, CN or NO2, an aromatic or heteroaromatic ring systems having 5 to 60 aromatic ring atoms, which may in each case be substituted by one or more radicals R1, or an aryloxy groups having 5 to 40 aromatic ring atoms, which may be substituted by one or more radicals R1 where two adjacent substituents R do not form a mono- or polycyclic, aliphatic ring system or aromatic ring system, which may be substituted by one or more radicals R1 and two adjacent substituents R0 do not form a mono- or polycyclic, aliphatic ring system or aromatic ring system, which may be substituted by one or more radicals R1,
• R1 stands on each occurrence, identically or differently, for H, D, F, Cl, Br, I, CHO, CN, C(═O)Ar3, P(═O)(Ar3)2, S(═O)Ar3, S(═O)2Ar3, N(Ar3)2, NO2, Si(R2)3, B(OR2)2, OSO2R2, a straight-chain alkyl, alkoxy or thioalkyl groups having 1 to 40 C atoms or branched or cyclic alkyl, alkoxy or thioalkyl groups having 3 to 40 C atoms, each of which may be substituted by one or more radicals R2, where in each case one or more non-adjacent CH2 groups may be replaced by R2C═CR2, C═C, Si(R2)2, Ge(R2)2, Sn(R2)2, C═O, C═S, C═Se, P(═O)(R2), SO, SO2, O, S or CONR2 and where one or more H atoms may be replaced by D, F, Cl, Br, I, CN or NO2, an aromatic or heteroaromatic ring systems having 5 to 60 aromatic ring atoms, which may in each case be substituted by one or more radicals R2, or an aryloxy group having 5 to 60 aromatic ring atoms, which may be substituted by one or more radicals R2,
• R2 stands on each occurrence, identically or differently, for H, D, F, Cl, Br, I, CN, a straight-chain alkyl, alkoxy or thioalkyl groups having 1 to 20 C atoms or branched or cyclic alkyl, alkoxy or thioalkyl groups having 3 to 20 C atoms, where in each case one or more non-adjacent CH2 groups may be replaced by SO, SO2, O, S and where one or more H atoms may be replaced by D, F, Cl, Br or I, or an aromatic or heteroaromatic ring system having 5 to 24 C atoms;
• Ar3 is an aromatic or heteroaromatic ring system having 5 to 24 aromatic ring atoms, which may in each case also be substituted by one or more radicals R3;
• n is 0;
• m is on each occurrence, identically or differently, 0, 1, 2, 3 or 4;
• p is on each occurrence, identically or differently, 0, 1, 2 or 3;
• q=1 and s=1;
• r is on each occurrence, identically or differently, 0, 1 or 2.