Dual layer electrophotographic recording material

This invention relates to: an electrophotographic recording material consisting of an electroconductive support material and a photoconductive double layer of organic materials which consists of a homogeneous, opaque, charge carrier producing dyestuff layer of a compound corresponding to the general formula WHEREIN M IS 0 OR 1, N IS 1 OR 2, X is oxygen or imino nitrogen (=N-), R1 and R3 which may be the same or different, are hydrogen, an alkyl group with 1 to 4 carbon atoms, an anthra-quinone or benzanthrone group, or -CO-NH-R5, with R5 being an anthraquinone group, R2 and R4, which may be the same or different, are hydrogen or a single bond directed to the position of a radical in R1 or R3, or a single bond which, together with the imino nitrogen, forms part of a pyrazole or pyrimidine ring, and R1 and R3 may also form a single C-C bond with one of the rings I or II of the general formula, thus resulting in a pyrrole structure, a dimeric compound with a ring-C-C-bond being formed when n = 2, and wherein ONE OR MORE RINGS MAY BE SUBSTITUTED BY THE SAME OR DIFFERENT ALKYL GROUPS WITH 1 TO 4 CARBON ATOMS, ALKOXY GROUPS WITH 1 TO 4 CARBON ATOMS, OR HALOGEN GROUPS, AND OF A TRANSPARENT TOP LAYER OF INSULATING MATERIALS CONTAINING AT LEAST ONE CHARGE TRANSPORTING COMPOUND.