TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation: No preparation method is given. Preferred Composition: The photoelectric conversion element further includes a hole-transport layer, and at least one electron-transport layer, where the hole transport layer is arranged between the anode and photoactive layer and the electron-transport layer is arranged between the cathode and the photoactive layer. Preferred Components: The photoactive layer includes an electron donor and an electron acceptor, where the electron donor comprises (I). The electron acceptor includes fullerene or its derivative, basocuproin, a semiconductive element, a semiconductive compound or an inorganic material. The mass ratio of the electron donor and electron acceptor is 1:10-10:1. (I) absorb light at a wavelength of 300-800 nm, and has a number average molecular weight of 500-10000. SPECIFIC COMPOUNDS - 6 Compounds (I) are specifically claimed e.g. 3,6-bis-(5-(9,10-di-naphthalen-2-yl-anthracen-2-yl)-thiophen-2-yl)-2,5-bis-(2-ethyl-hexyl)-2,5-dihydro-pyrrolo(3,4-c)pyrrole-1,4-dione of formula (Ia), 3,6-bis-(5-(9,10-di-naphthalen-2-yl-anthracen-2-yl)-thiophen-2-yl)-2-(2-heptyl-decyl)-5-(2-hexyl-decyl)-2,5-dihydro-pyrrolo(3,4-c)pyrrole-1,4-dione, 1,4-bis(5-(9,10-bis(2-naphthyl)-2-anthryl)-2-thienyl)-2,5-bis(2-octylundecyl)pyrrolo(3,4-c)pyrrole-3,6-dione, 1,4-bis(5-(5-(9,10-bis(2-naphthyl)-2-anthryl)-2-thienyl)-2-thienyl)-2,5-bis(2-hexyldecyl)pyrrolo(3,4-c)pyrrole-3,6-dione and 3,6-bis-(5'-(9,10-di-naphthalen-2-yl-anthracen-2-yl)-(2,2')bithiophenyl-5-yl)-2,5-bis-(2-ethyl-hexyl)-2,5-dihydro-pyrrolo(3,4-c)pyrrole-1,4-dione.    EXAMPLE - 4-(4-Bromocyclopenta-1,3-dien-1-yl)-1-(5-bromo-2-thienyl)-2,5-bis(2-octyldodecyl)pyrrolo(3,4-c)pyrrole-3,6-dione was reacted with 2-(5-(9,10-di-naphthalen-2-yl-anthracen-2-yl)-thiophen-2-yl)-4,4,5,5-tetramethyl-(1,3,2)dioxaborolane in tetrahydrofuran and in the presence of palladium(0) and potassium carbonate to obtain 1,4-bis(5-(5-(9,10-bis(2-naphthyl)-2-anthryl)-2-thienyl)-2-thienyl)-2,5-bis(2-hexyldecyl)pyrrolo(3,4-c)pyrrole-3,6-dione.