Organic solar cell of the bulk heterojunction type comprising an imide based conjugated backbone compound as photoactive material

摘要

The invention relates to a solar cell comprising at least a substrate (10), a cathode (11), a hole conductive layer (12), a bulk heterojunction photoactive layer (13) of a blend of a donor material and an acceptor material, an electron conductive layer (14) and an anode (15), wherein the blend comprises at least one photoactive material comprising a conjugated backbone system having: i) the general formula R2-imide-Ar-L-Ar-imide-R3, wherein Ar-L-Ar is a conjugated chromophore, imide is imide -OCNCO-, R2 and R3 are organic groups, bonded to the N atom of the respective imide and forming a conjugated bond with the respective imide; or. ii) repeating units (R4-imide-Ar-L-Ar-imide)n, wherein Ar-L-Ar is a conjugated chromophore, imide is imide -OCNCO-, R4 is an organic group bonded to the N atom of the respective imide and forming a conjugated bond with the respective imide and n is the number of repeating units.