Patent ID: 8007971

Claim:
A photoconductor comprising a supporting substrate, a photogenerating layer, and two charge transport layers comprised of a top charge transport layer and a bottom charge transport layer, and wherein said top charge transport layer is in contact with said bottom charge transport layer and said bottom charge transport layer is in contact with said photogenerating layer, and wherein each of said top charge transport layer and said bottom charge transport layer contains from about 10 to about 75 percent by weight of a charge transport compound selected from the group consisting of N,N′-diphenyl-N,N-bis(3-methylpheny)-1,1′-biphenyl -4,4′-diamine, tetra-p-tolyl-biphenyl-4,4′-diamine, N,N′-diphenyl-N,N′-bis(4-methoxyphenyl)-1,1-biphenyl-4,4′-diamine, N,N′-bis(4-butylphenyl)-N,N′-di-m -tolyl-[p-terphenyl]-4,4′-diamine, N,N′-bis(4-butylphenyl)-N,N′-di-o-tolyl-[p -terphenyl]-4,4′-diamine, N,N′-bis(4-butylphenyl)-N,N′-bis-(4-isopropylphenyl) -[p-terphenyl]-4,4′-diamine, N,N′-bis(4-butylphenyl)-N,N′-bis-(2-ethyl-6-methylphenyl)-[p-terphenyl]-4,4′-diamine, N,N′-bis(4-butylphenyl)-N,N′-bis -(2,5-dimethylphenyl)-[p-terphenyl]-4,4′-diamine, and N,N′-diphenyl-N,N′-bis(3-chlorophenyl)[p-terphenyl]-4,4′-diamine; and a tris(butadienylary)amine selected from the group consisting of at least one of tris[4-(4,4-diphenyl-1,3-butadienyl)phenyl]amine, tris[4-(4,4-dimethylphenyl-1 ,3-butadienyl)phenyl]amine, [4-(4,4-diphenyl-1,3-butadienyl)phenyl]bis[4-(2,2-diphenylethenyl)phenyl]amine, [4-(2,2-diphenylethenyl)phenyl]bis[4-(4,4-diphenyl-1,3-butadienyl)phenyl]amine, and tris[4-(2,2-diphenylethenyl)phenyl]amine present in an amount of from about 1 to about 20 weight percent.