The invention relates to a photoactive component comprising organic layers, in particular, solar cells, comprising a layer which comprises an electrode and a counter-electrode in addition to a sequence of organic layers which is arranged between the electrode and the counter-electrode. Photoactive areas are formed in two adjacent layers, that is, an electron harvesting layer (EHL - 'Electron Harvesting Layer') and an electron separating layer (ESL - 'Electron Separating Layer') in one of the sequences of organic layers. The electron harvesting layer (EHL) is a mixed layer which contains an organic material (A) and at least one additional organic material (B), wherein: (i) the lowest singlet-excitation state for electrons(ESL).