Photoconductive imaging member with a charge transport layer comprising a biphenyl diamine and a polysilylane

An imaging member consisting essentially of a supporting substrate, a photogenerating layer, and a charge transport layer comprised of a mixture of biphenyl diamine and a polysilylene ##STR8## wherein the biphenyl diamine is N,N'-bis(4-methylphenyl)-N,N'-bis(4-ethylphenyl)-[1,1'-(3,3'-dimethyl)biph enyl]-4,4'-diamine, and wherein the polysilyene is selected from the group consisting of poly(methylphenyl) silylene, poly(cyclohexyl methyl) silylene, poly(betaphenethylmethyl silylene), poly(n-propylmethyl-co-methylphenyl silylene), poly(n-propylmethyl silylene), poly(methylphenyl-co-cyclohexylmethyl) silylene, and poly(methylphenyl-co-p-methoxyphenyl) silylene.