Patent ID: 7622231

Claim:
An imaging member consisting essentially of a supporting substrate; a photogenerating layer; at least one charge transport layer comprised of at least one charge transport component and a polymer binder; and a polymer layer in contact with the charge transport layer comprised of a polymer selected from the group consisting of at least one of polycarbonates, polystyrenes, polyarylates, polyesters, polyimides, polysiloxanes, polysulfones, polyphenyl sulfides, polyetherimides, and polyphenylene vinylenes, and wherein said charge transport layer comprises at least one component of the formula/structure wherein X represents alkyl; wherein said at least one charge transport layer is 1, 2, or 3 layers, and wherein said charge transport layer and said polymer layer are intermixed resulting in the presence of the charge transport component in a gradient concentration from the highest concentration in the bottom of the charge transport layer in a direction that the lowest concentration is on the surface of the polymer layer, and wherein said gradient comprises from about 5 to about 15 percent by weight of said charge transport component on the surface of said polymer layer; from about 25 to about 35 percent by weight of said charge transport component in an intermixed region between said polymer layer and said charge transport layer; and from about 40 to about 50 percent by weight of said charge transport component at the bottom of said charge transport layer; and wherein the concentration gradient is accomplished by diffusing of the charge transport component from the charge transport layer to the polymer layer.