Layered electrophotographic photoconductor

In a layered electrophotographic photoconductor comprising an electroconductive support material and a photoconductive double layer which consists of a charge generation layer and a charge transport layer, the improvement comprising:

• a. said charge generation layer comprises a disazo pigment selected from the group consisting of disazo pigments of the formula ##STR21## where A represents ##STR22## and X represents an aromatic ring, or a heterocyclic ring, or their substituted rings;
• Ar.sub.1 represents an aromatic ring, or a heterocyclic ring, or their substituted rings;
• Ar.sub.2 and Ar.sub.3 each represent an aromatic ring, R.sub.1 and R.sub.1 each represent hydrogen, a lower alkyl group, a phenyl group or their substituted groups;
• and R.sub.2 represents a lower alkyl group, a carboxyl group or its ester group, and
• b. said charge transport layer comprises a charge transport material capable of forming a charge-transfer complex by reaction with 2,4,7-trinitro-9-fluorenone, the light energy value corresponding to the wavelength of the maximum visible spectral absorption of said charge-transfer complex being in the range of 1.6 to 2.1 eV, and being selected from the group consisting of:
• 9-methyl-3-formylcarbazole-1'-methyl-1' phenylhydrazone,
• 9-(4-diethylaminostyryl-1)-anthracene,
• 9-(4-dibenzylaminobenzylidene-1)-fluorene,
• 9-{4-di-(4-methylbenzyl)aminobenzylidene}-fluorene,
• 4-methoxy-1-formylnaphthalene-1'-methyl-1'-phenylhydrazone, and
• 4-dibenzylaminobenzaldehyde-1'-methyl-1'-phenylhydrazone.