Abstract: Disclosed is a light-sensitive member for electrophotography, having a charge generating phase formed by coating a dispersion comprising a charge generating substance, which contains in said charge generating phase an amine in an amount of 20-fold moles or less per mole of said charge generating substance and the solvent. Also disclosed are useful methods for the preparation of such a light-sensitive member.

Abstract: There is disclosed an electrophotographic photosensitive member comprising a photosensitive layer comprising a combination of a carrier generating layer and a carrier transporting layer provided on an electroconductive support, the carrier generating layer containing a bisazo compound and the carrier transporting layer containing a styryl compound and/or an amine derivative, a hydrazone compound or a carbazole derivative.The electrophotographic photosensitive member according to the present invention has a high sensitivity and can form constantly good visible images.

Abstract: A highly sensitive photoreceptor for electrophotography that forms a sharp image during repeated use is disclosed. It comprises an electrically conductive support having successively formed thereon a photoconductive photosensitive layer and a protective layer for that photosensitive layer, said photosensitive layer comprising an organic photoconductive material and said protective layer comprising an amorphous silicon carbide or amorphous silicon nitride containing a hydrogen atom and/or a fluorine atom. A method of forming a latent electrostatic image and an electrophotographic process using such photoreceptor are also disclosed.

Abstract: An electrophotographic element having a carrier generating layer and a carrier transport layer, which carrier transport layer contains an arylamine derivative and an amine substituted styryl compound, is disclosed.

Abstract: Disclosed is a photosensitive element for electrophotography comprised of a layered structure having a polycyclic quinone pigment dispersed in an organic resin binder as a charge generating layer and an organic charge transport layer mixed with a resin binder.

Abstract: An electrophotographic photosensitive element having a conductive support provided thereon with a photosensitive layer comprising (i) a carrier-generating phase layer containing a carrier-generating material selected from the group consisting of perylene dyes, polycyclic quinones and azo dyes and (ii) a carrier-transporting phase layer containing a carrier-transporting material wherein said carrier-transporting phase comprises a hydrazone compound represented by the formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each represent an aryl group which may have a substituent or substituents, and Ar represents an arylene group which may have a substituent or substituents.

Abstract: An electrophotographic light-sensitive element comprising a conductive support which supports a light-sensitive layer containing a carbazole derivative of the formula: ##STR1## wherein R.sub.1 is an aryl group, R.sub.2 is hydrogen, a halogen, an alkyl, an alkoxy, an amino or hydroxy group, and R.sub.3 is an aryl, or a heterocyclic group.

Abstract: Electrophotographic light-sensitive elements containing substituted or unsubstituted fluorenone hydrazones as charge generating or charge transport materials are described.

Abstract: An electrophotographic photosensitive element having a conductive support provided thereon with a photosensitive layer comprising a carrier-generating phase and a carrier-transporting phase. The carrier-transporting phase comprises a hydrazone compound to improve carrier-transporting ability having the formula ##STR1## wherein, X and Y each represent a hydrogen or a halogen, R.sub.1 and R.sub.2 each represent an aryl group which may have a substituent or substituents, and Ar represents an arylene group which may have a substituent or substituents.

Abstract: The present invention relates to a photosensitive element for electrophotography comprising on an electrically conductive support a charge carrier generating phase and a charge carrier transport phase containing a P-type organic semiconductor, a poly-N-vinylcarbazole and/or its derivative, a Lewis Acid and a Bronsted acid.

Abstract: A photosensitive element for electrophotography which comprises a conductive support, a charge generating layer containing a charge generating substance, and a charge transporting layer. The element comprises a polymeric binder containing a charge transporting substance represented by the formula (I). ##STR1## wherein n represents 0 or 1, R.sub.1, R.sub.2 and R.sub.3 each represent an aryl group, and R.sub.4 and R.sub.5 each represent a hydrogen, an alkyl group having 1-4 carbon atoms, an aryl group or an aralkyl group, provided that R.sub.4 and R.sub.5 are not simultaneously a hydrogen, and when n is 0, R.sub.4 is not hydrogen.

Abstract: The conductive substrate is formed so that the pore openings therein gradually expand in size from one side to the other side of the substrate. When the subtrate is operated with an insulating material from the side having the larger openings, the insulating material adheres to the inclined internal circumferential surface of the pores. When a conductive layer is formed by vacuum evaporation deposition on the insulating layer, there is no short-circuit formed between the conductive layer and the substrate due to the complete insulation of the substrate without diminishing the size of the pore openings. The ratio of the smaller width of the openings to the larger width and the ratio of the depth of the inclined portion of each micro-opening to the thickness of the substrate are respectively within the range of from 1/5 to 4/5.

Abstract: A photo-sensitive screen for producing an electrostatic latent image of an original to be copied is of multi-layer structure having an apertured region in which fine apertures are formed in uniform distribution and including a photo-conductive insulative layer, an electrically conductive substrate, an insulating layer and an electrically conductive layer superposed upon one another in this order, wherein a solid region having no apertures is formed outside of the apertured region for allowing an electrode to be secured thereon in electrical contact with the electrically conductive layer. The electrode serves for applying a bias voltage to the electrically conductive layer for establishing electric field of a predetermined profile between the conductive substrate and the conductive layer across the interposed insulating layer.