TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The third material has an energy level, in which the amount of the lowest unoccupied molecular orbital (LUMO) is less than or equal to the amount of LUMO of the acceptor, and the amount of the highest unoccupied molecular orbital (HOMO) is greater than or equal to HOMO of the donor. The amount of the LUMO of the third material is 0.3 eV less than the amount of the LUMO of the acceptor material of the photoactive layer, and/or the amount of the HOMO of the third material is 0.3 eV greater than the amount of the energy level of the HOMOs of the donor material of the photoactive layer. A portion of the third material in the photoactive layer is 0.1-30 wt.%, preferably 0.1-10 wt.%. The donor material of the photoactive layer and the third material are an oligomer. The third material is formed so that the third material minimizes a crystallization of the donor- and/or acceptor-phase due to its molecular structure. The crystallization of donor and/or acceptor is avoided. The molecular structure of the third material is formed such that the third material causes a lattice defect in the donor- and/or acceptor-material. The third material is selected so that the third material has a minimum distance between the acceptor and the donor, where the third material simultaneously contributes to the phase separation of the acceptor and donor. The third material carries the crystallization of the donor- and/or acceptor phase due to its molecular structure. The first and second regions are spatially separated. The third material has first and second regions in its molecular structure, and comprises crown ether, triphenyl, sorbitols, quinacridones, bis(4-(tert-butyl)benzoato-O) hydroxyaluminum. The crown ether is of formula (I)-(IX).Ar1 = phenyl, biphenyl, triphenyl, naphthyl, binaphthyl, 3-6 fused phenyl rings, anthracenyl, phenanthrenyl, pyrenyl;HetAr = thiophene, pyrrole, furan, oxazole, thiazole, oxadiazole, thiadiazole, triazole, pyridine, pyrimidine, pyrazine, benzopyrrole, benzofuran, benzothiophene, benzopyrrole, benzofuran, benzoxazole, benzothiophene, benzopyrrole, benzofuran, benzoxazole, benzothiazole, thienothiophenes, thienopyrrol, thienofuran, 3-6 fused heterocycles, dithienothiophene, dithienopyrrol, dithienobenzene, dithieno cyclopentadiene, dipyrrolobenzol, ether bridges in 1,2-, 1,3- and 1,4-linkage to the each phenyl ring (ortho, meta and para position), naphthyl ring, fused phenyl ring, heteroaryl ring or fused heteroaryl ring;R1-R12 = H, CH3, C2H5, C3H7, C4H9, C5H11, C6H13, Isobutyl, CF3, C2F5, C3F7, C4F9, C5F11, C6F13, OH, O-CH3, CH2-O-CH3, CH2-O-CH2-CH3, CN, phenyl, or thiophene;m, n = 1-6;o, p, q = 0-6; andn, m = 3-5.