Tris and bis(enylaryl)arylamine mixtures containing photoconductors

A photoconductor comprising:

• a supporting substrate,
• a photogenerating layer,
• a bottom charge transport layer in contact with said photogenerating layer, and
• a top charge transport layer in contact with said bottom charge transport layer,
• wherein said top charge transport layer and said bottom charge transport layer each is comprised of from about 10 to about 75 percent by weight of a charge transport compound, a binder, and a mixture of a bis(enylaryl)arylamine and a tris(enylaryl)amine,
• said charge transport compound being an aryl amine selected from at least one of the group consisting of N,N′-diphenyl-N,N-bis(3-methylphenyl)-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-p-tolyl-[p-terphenyl]-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, NR-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,
• said mixture is comprised of from about 30 to about 70 weight percent of said tris(enylaryl)amine and from about 70 to about 30 weight percent of said bis(enylaryl)arylamine, and wherein the total thereof is about 100 percent, and wherein said bis(enylaryl)arylamine is selected from the group consisting of at least one of N,N-bis[4-[4,4-bis(4-methylphenyl)-1,3-butadienyl]phenyl]-4-methoxyphenylamine, [4-(2,2-diphenylethenyl)phenyl][4-(4,4-diphenyl-1,3-butadienyl)phenyl]phenylamine, N,N-bis[4-(2,2-diphenylethenyl)phenyl]-4-methylphenylamine, and N,N-bis[4-[2,2-bis(4-methylphenyl)ethenyl]phenyl]-4-methylphenylamine, and said tris(enylaryl)amine is 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.