Organic light-emitting diodes comprising at least one disilyl compound selected from disilylcarbazoles, disilyldibenzofurans, disilyldibenzothiophenes, disilyldibenzopholes, disilyldibenzothiophene s-oxides and disilyldibenzothiophene s,s-dioxides

An organic light-emitting diode comprising an anode An and a cathode Ka and a light-emitting layer E and if appropriate at least one further layer, selected from the group consisting of:

• at least one blocking layer for electrons/excitons, at least one blocking layer for holes/excitons, at least one hole injection layer, at least one hole conductor layer, at least one electron injection layer and at least one electron conductor layer,
• wherein the organic light-emitting diode comprises at least one compound of the general formula I which is present in the light-emitting layer E and/or in the at least one further layer,
• in which:
• X is NR1, S, O, PR1, SO2 or SO
• R1 is substituted or unsubstituted C1-C20-alkyl, substituted or unsubstituted C6-C30-aryl, or substituted or unsubstituted heteroaryl having from 5 to 30 ring atoms;
• R2, R3, R4, R5, R6, R7
• are each independently substituted or unsubstituted C1-C20-alkyl, or substituted or unsubstituted C6-C30-aryl, or a structure of the general formula (c)
• Ra, Rb
• are each independently substituted or unsubstituted C1-C20-alkyl, substituted or unsubstituted C6-C30-aryl, or substituted or unsubstituted heteroaryl having from 5 to 30 ring atoms or a substituent with donor or acceptor action selected from the group consisting of:
• C1-C20-alkoxy, C6-C30-aryloxy, C1-C20-alkylthio, C6-C30-arylthio, SiR14R15R16, halogen radicals, halogenated C1-C20-alkyl radicals, carbonyl (—CO(R14)), carbonylthio (—C═O(SR14)), carbonyloxy (—C═O(OR14)), oxycarbonyl (—OC═O(R14)), thiocarbonyl (—SC ═O(R14)), amino (—NR14R15), OH, pseudohalogen radicals, amido (—C═O(NR14)), —NR14C═O(R15), phosphonate (—P(O) (OR14)2, phosphate (—OP(O) (OR14)2), phosphine (—PR14R15), phosphine oxide (—P(O)R142), sulfate (—OS(O)2OR14), sulfoxide (—S(O)R14), sulfonate (—S(O)2OR14), sulfonyl (—S(O)2R14), sulfonamide (—S(O)2NR14R15), NO2, boronic esters (—OB(OR14)2), imino (—C═NR14R15)) borane radicals, stannane radicals, hydrazine radicals, hydrazone radicals, oxime radicals, nitroso groups, diazo groups, vinyl groups, sulfoximines, alanes, germanes, boroximes and borazines.
• R14, R15, R16
• are each independently substituted or unsubstituted C1-C20-alkyl, or substituted or unsubstituted C6-C30-aryl;
• q,r are each independently 0, 1, 2 or 3;
• where, in the case when q or r is 0, all substitutable positions of the aryl radical are substituted by hydrogen,
• where the radicals and indices in the group of the formula (c) X″′, R5″′, R6″′, R7″′, Ra″′, Rb″′, q″′ and r″′ are each independently as defined for the radicals and indices of the compounds of the general formula (I) X, R5, R6, R7, Ra, Rb, q and r,
• where,
• in the case that the compound of the general formula (I) is present exclusively in the light-emitting layer or in the light-emitting layer and in the hole conductor layer and the group X is NR1, at least one of the R1 to R7, Ra or Rb radicals in the compounds of the formula (I) comprises at least one heteratom.