| 摘要 |
The present invention relates to the use of compounds of the general formula I in which A1, A2, A3 are each independently divalent organic units which may comprise one, two or three optionally substituted aromatic or heteroaromatic groups, where, in the case of two or three aromatic or heteroaromatic groups, two of these groups in each case are joined to one another by a chemical bond and/or via a divalent alkyl radical, R1, R2, R3 are each independently R, OR, NR2, A3-OR or A3-NR2 substituents, R is alkyl, aryl or a monovalent organic radical which may comprise one, two or three optionally substituted aromatic or heteroaromatic groups, where, in the case of two or three aromatic or heteroaromatic groups, two of these groups in each case are joined to one another by a chemical bond and/or via a divalent alkyl or NR′radical, R′is alkyl, aryl or a monovalent organic radical which may comprise one, two or three optionally substituted aromatic or heteroaromatic groups, where, in the case of two or three aromatic or heteroaromatic groups, two of these groups in each case are joined to one another by a chemical bond and/or via a divalent alkyl radical, and n at each instance in formula I is independently 0, 1, 2 or 3, with the proviso that the sum of the individual values n is at least 2 and at least two of the R1, R2 and R3 radicals are OR and/or NR2 substituents, as hole-conducting materials in organic solar cells. The present invention further relates to organic solar cells which comprise these compounds.
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