Siloles substituted by fused ring systems and use thereof in organic electronics

A matrix material and/or hole/exciton blocker material comprising a compound represented by formula (I)

• in which:
• A has the following general formula Aa
• in which:
• X is S, O, NR5, SO, SO2 or PR6;
• Y is a bond or NR5, CR7R8, O, SO, SO2 or S;
• R5 is cycloalkyl, heterocycloalkyl, aryl or heteroaryl;
• R6 is alkyl, cycloalkyl, heterocycloalkyl, aryl or heteroaryl;
• R7, R8 are each independently hydrogen, alkyl, cycloalkyl, heterocycloalkyl, aryl or heteroaryl;
• and
• in each case independently is a fused ring which has 5 to 6 ring members and, in addition to the double bond already present, may have one or more double bonds and may be unsubstituted or substituted by one or more substituents, selected from alkyl, cycloalkyl, heterocycloalkyl, aryl, heteroaryl, SiR2R3R4 and groups with donor or acceptor action, wherein the fused ring having 5 or 6 ring atoms may additionally be annulated to one or more further fused rings having 5 or 6 ring atoms;
• is an Si-containing ring which has 4 to 10 ring members, where the ring may be saturated or mono- or polyunsaturated and, in addition to the silicon atom, may have one or more further heteroatoms, and may be unsubstituted or substituted by one or more substituents selected from alkyl, cycloalkyl, heterocycloalkyl, aryl, heteroaryl and substituents with donor or acceptor action, wherein the Si-containing ring may additionally be part of a fused ring system formed from at least two rings, wherein the further rings in the fused ring system may each independently be saturated or mono- or polyunsaturated and unsubstituted or substituted by one or more substituents selected from alkyl, cycloalkyl, heterocycloalkyl, aryl, heteroaryl, and substituents with donor or acceptor action, and may have one or more heteroatoms;
• R1 is a fused ring system formed from at least 3 fused rings which each independently have 4 to 10 ring members and may be saturated or mono- or polyunsaturated and unsubstituted or substituted by one or more substituents selected from alkyl, cycloalkyl, heterocycloalkyl, aryl, heteroaryl, SiR2R3R4 and groups with donor or acceptor action, wherein
• the fused ring system has at least one heteroatom in the fused ring system itself or in at least one substituent or alkyl, cycloalkyl, heterocycloalkyl, aryl or heteroaryl;
• R2, R3, R4
• are each independently alkyl, cycloalkyl, heterocycloalkyl, aryl, heteroaryl, where the R2, R3 and R4 moieties or two of the R2, R3 and R4 moieties may additionally together form a fused ring system composed of 2 to 6 rings, each of which may be saturated or mono- or polyunsaturated and may be unsubstituted or substituted by one or more substituents selected from alkyl, cycloalkyl, heterocycloalkyl, aryl, heteroaryl and a group with donor or acceptor action.