Composite layered imaging member for electrophotography
AssigneeXerox Corporation
InventorAnthony M. Horgan
Life of this patent
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Abstract
An imaging member comprising a first layer of electrically active charge transport material contained on a supporting substrate, a photoconductive layer overlying said active layer, and a second layer of electrically active charge transport material overlying said photoconductive layer, said photoconductive layer exhibiting the capability of photogeneration of charge carriers and injection of said charge carriers, one of said electrically active layers which comprises an electrically inactive resinous material made electrically active by the addition of certain activating compounds thereto exhibits the capability of facile hole injection and transport and the other electrically active layer exhibits the capability of facile electron injection and transport.
Claims32
An imaging member comprising a first layer of electrically active charge-transport material contained on a supporting substrate, a photoconductive layer overlying said active layer, and a second layer of electrically active charge transport material overlying said photoconductive layer, said photoconductive layer exhibiting the capability of photo-generation of charge carriers and injection of said charge carriers, one of said electrically active layers comprising electrically inactive resinous material having dispersed therein from about 10 to about 75 percent by weight of a material selected from the group consisting of N,N'-diphenyl-N,N'-bis(2-methylphenyl)-[1,1'-biphenyl]-4,4'-diamine;
- N,N'-bis(3-methylphenyl)-[1,1'-biphenyl]-4,4'-diamine;
- N,N'-diphenyl-N,N'-bis(4-methylphenyl)-[1,1'-biphenyl]-4,4'-diamine;
- N,N'-diphenyl-N,N'-bis(2-chlorophenyl)-[1,1'-biphenyl]-4,4'-diamine;
- N,N'-diphenyl-N,N'-bis(3-chlorophenyl)-[1,1'-biphenyl]-4,4'-diamine and N,N'-diphenyl-N,N'-bis(4-chlorophenyl)-[1,1'-biphenyl]-4,4'-diamine, and capable of supporting the injection of photogenerated holes from said photoconductive layer and transporting said holes through said electrically active layer and the other electrically active layer capable of supporting the injection of photogenerated electrons from said photoconductive layer and transporting said electrons through said electrically active layer.
A method of imaging which comprises:
- a. providing an imaging member comprising a first layer of electrically active charge-transport material contained on a supporting substrate, a photoconductive layer overlying said active layer, and a second layer of electrically active charge transport material overlying said photoconductive layer, said photoconductive layer exhibiting the capability of photo-generation of charge carriers and injection of said charge carriers, one of said electrically active layers comprising electrically inactive resinous material having dispersed therein from about 10 to about 75 percent by weight of a material selected from the group consisting of N,N'-diphenyl-N,N'-bis(2-methylphenyl)-[1,1'-biphenyl]-4,4'-diamine;
- N,N'-bis(3-methylphenyl)-[1,1'-biphenyl]-4,4'-diamine;
- N,N'-diphenyl-N,N'-bis(4-methylphenyl)-[1,1'-biphenyl]-4,4'-diamine;
- N,N'-diphenyl-N,N'-bis(2-chlorophenyl)-[1,1'-biphenyl]-4,4'-diamine;
- N,N'-diphenyl-N,N'-bis(3-chlorophenyl)-[1,1'-biphenyl]-4,4'-diamine and N,N'-diphenyl-N,N'-bis(4-chlorophenyl)-[1,1'-biphenyl]-4,4'-diamine, and capable of supporting the injection of photogenerated holes from said photoconductive layer and transporting said holes through said electrically active layer and the other electrically active layer capable of supporting the injection of photogenerated electrons from said photoconductive layer and transporting said electrons through said electrically active layer;
- b. uniformly electrostatically charging said member, followed by;
- c. imagewise exposing said charged member to a source of activating radiation which results in the generation of electron-hole pairs by the photoconductive layer, said holes being injected into and transported through said electrically active layer capable of supporting the injection of photogenerated holes from said photoconductive layer and transporting said holes through said electrically active layer, and said electrons being injected into and transported through said electrically active layer capable of supporting the injection of photogenerated electrons from said photoconductive layer and transporting said electrons through said electrically active layer, resulting in the formation of a latent electrostatic image on the surface of said member.
Dependencies are inferred from the claim text.