The use of mixtures comprising, as components, K1) one or more compounds of the general formula as an electron donor or electron acceptor, in which A is a bridge consisting of two or three sp 3 -hybridized carbon atoms, in which each carbon atom may additionally be substituted by one R 101 substituent each and which may additionally be benzofused, W is C 2 L is a divalent, optionally singly or multiply fused carbo- or heterocycle, n is 1, X 100 is CH X 200 is C(R 111) 2, R 100 is H, alkyl, C 1 -C 6 -alkylene-COO-alkyl, C 1 -C 6 -alkylene-O-CO-alkyl, C 1 -C 6 - alkylene-O-CO-O-alkyl, cycloalkyl, arylalkyl, aryl, OR 110, SR 110, hetaryl, halogen, NO 2 or CN, R 101 is alkyl, C 1 -C 6,-alkylene-COO-alkyl, C 1 -C 6 -alkylene-O-CO-alkyl, C 1 -C 6 - alkylene-O-CO-O-alkyl, cycloalkyl, arylalkyl, aryl or hetaryl, R 110 is H, alkyl, C 1 -C 6 -alkylene-COO-alkyl, C 1 -C 6 -alkylene-O-CO-alkyl, C 1 -C 6 - alkylene-O-CO-O-alkyl, cycloalkyl, arylalkyl or aryl, R 111 is H, alkyl, C 1 -C 6 -alkylene-COO-alkyl, C 1 -C 6 -alkylene-O-CO-alkyl, C 1 -C 6 - alkylene-O-CO-O-alkyl, cycloalkyl, arylalkyl, aryl or hetaryl, where the carbon chains of the alkyl and cycloalkyl radicals may be interrupted by one or two nonadjacent oxygen atoms and the aforementioned variables, where they occur more than once, may be the same or different, and K2) one or more compounds which, with respect to component K1), act correspondingly as an electron acceptor or electron donor for producing photoactive layers for organic solar cells and organic photodetectors. K1) one or more compounds of the general formula as an electron donor or electron acceptor, in which A is a bridge consisting of two or three sp 3 -hybridized carbon atoms, in which each carbon atom may additionally be substituted by one R 101 substituent each and which may additionally be benzofused, W is C 2 L is a divalent, optionally singly or multiply fused carbo- or heterocycle, n is 1, X 100 is CH X 200 is C(R 111) 2, R 100 is H, alkyl, C 1 -C 6 -alkylene-COO-alkyl, C 1 -C 6 -alkylene-O-CO-alkyl, C 1 -C 6 - alkylene-O-CO-O-alkyl, cycloalkyl, arylalkyl, aryl, OR 110, SR 110, hetaryl, halogen, NO 2 or CN, R 101 is alkyl, C 1 -C 6,-alkylene-COO-alkyl, C 1 -C 6 -alkylene-O-CO-alkyl, C 1 -C 6 - alkylene-O-CO-O-alkyl, cycloalkyl, arylalkyl, aryl or hetaryl, R 110 is H, alkyl, C 1 -C 6 -alkylene-COO-alkyl, C 1 -C 6 -alkylene-O-CO-alkyl, C 1 -C 6 - alkylene-O-CO-O-alkyl, cycloalkyl, arylalkyl or aryl, R 111 is H, alkyl, C 1 -C 6 -alkylene-COO-alkyl, C 1 -C 6 -alkylene-O-CO-alkyl, C 1 -C 6 - alkylene-O-CO-O-alkyl, cycloalkyl, arylalkyl, aryl or hetaryl, where the carbon chains of the alkyl and cycloalkyl radicals may be interrupted by one or two nonadjacent oxygen atoms and the aforementioned variables, where they occur more than once, may be the same or different, and A is a bridge consisting of two or three sp 3 -hybridized carbon atoms, in which each carbon atom may additionally be substituted by one R 101 substituent each and which may additionally be benzofused, W is C 2 L is a divalent, optionally singly or multiply fused carbo- or heterocycle, n is 1, X 100 is CH X 200 is C(R 111) 2, R 100 is H, alkyl, C 1 -C 6 -alkylene-COO-alkyl, C 1 -C 6 -alkylene-O-CO-alkyl, C 1 -C 6 - alkylene-O-CO-O-alkyl, cycloalkyl, arylalkyl, aryl, OR 110, SR 110, hetaryl, halogen, NO 2 or CN, R 101 is alkyl, C 1 -C 6,-alkylene-COO-alkyl, C 1 -C 6 -alkylene-O-CO-alkyl, C 1 -C 6 - alkylene-O-CO-O-alkyl, cycloalkyl, arylalkyl, aryl or hetaryl, R 110 is H, alkyl, C 1 -C 6 -alkylene-COO-alkyl, C 1 -C 6 -alkylene-O-CO-alkyl, C 1 -C 6 - alkylene-O-CO-O-alkyl, cycloalkyl, arylalkyl or aryl, R 111 is H, alkyl, C 1 -C 6 -alkylene-COO-alkyl, C 1 -C 6 -alkylene-O-CO-alkyl, C 1 -C 6 - alkylene-O-CO-O-alkyl, cycloalkyl, arylalkyl, aryl or hetaryl, where the carbon chains of the alkyl and cycloalkyl radicals may be interrupted by one or two nonadjacent oxygen atoms and the aforementioned variables, where they occur more than once, may be the same or different, K2) one or more compounds which, with respect to component K1), act correspondingly as an electron acceptor or electron donor for producing photoactive layers for organic solar cells and organic photodetectors.