Abstract: An organic photoconductor, comprises a conductive base, a charge generating lager and a charge transport layer, wherein the charge generating lager and the charge transport layer are provided in this order on the conductive base, wherein when a curve is drawn by plotting integrated-values of a detected current in terms of time in measurement of transient photocurrent by TOF (time of flight) measurement with an electric field intensity of 10V/?m , crossing angle ? of two tangent lines tangent to the curve is 15° to 45°; and the charge transport lager has a film thickness of 20 to 35 ?m.

Abstract: An imaging member with a surface-grafted material having an inorganic material, a linking group, and a charge transport moiety capable of transporting holes or electrons, and the charge transport moiety is grafted to a surface of the inorganic material via the linking group, and further, an image forming apparatus having the imaging member.

Abstract: An electrophotographic photoreceptor having an intermediate layer in which the intermediate layer contains a compound formed from a composition containing the following components X, Y and Z.

Abstract: A photoconductive imaging member comprised of an optional supporting substrate, a hole blocking layer thereover, a photogenerating layer, and a charge transport layer, and wherein the hole blocking layer is comprised of a pyrolyzed polyacrylonitrile.

Abstract: The present invention discloses a hole transport layer of an organic EL display, comprising: a material including one of a PEDOT which is a mixture of a poly (3,4)-ethylenedioxythiophene and a polystyrenesulfonate, a PANI which is a mixture of a polyaniline and a polystyrenesulfonate, and an aromatic amine derivative; and an organic compound derivative having the general structure, R1R2MR3R4, where “M” denotes one metal selected from a group consisting of Ti, Pt and one metal among elements belonging to groups 3A and 4A of periods 3 to 5.

Abstract: An electrophotographic photoreceptor having an interlayer and a photosensitive layer on an electroconductive substrate, wherein the interlayer comprises any one of 1) an N-type semiconductive particle containing at least one of transition metals having an atomic number of 21 to 30, 39, 41 to 48 and 57 to 80, the total amount of the transition metals having an atomic number of 21 to 30, 39, 41 to 48 and 57 to 80 being from 100 ppm to 2.0% by mass, or 2) a metal oxide particle containing a silicon atom in a bond energy spectrum by the X-ray photoelectron spectroscopy at a ratio represented by the following Formula (1): Formula (1) 0.02?Si/M?0.55 Si: a peak intensity of a silicon atom among the bond energy spectrum, and M: a peak intensity of a metal atom among the bond energy spectrum.

Abstract: An undercoat composition and resulting layer formed therefrom, is disclosed which finds particular application in multilayered photoreceptors, such as are used in xerographic printing systems. The undercoat composition comprises an n-type pigment and a binary binder comprising an isocyanate and a phenolic resin.

Abstract: A charge transport layer for an imaging member comprising a first and second charge transport layer wherein the second charge transport layer comprises a charge transport component, a hindered phenol covalently bonded to a polymer, and an additional polymer binder other than the polymer containing the hindered phenol. The charge transport layer exhibits excellent wear resistance, excellent electrical performance, and excellent print quality.

Abstract: A photoconductive imaging member comprised of an optional supporting substrate, a hole blocking layer thereover, a photogenerating layer, and a charge transport layer, and wherein the hole blocking layer is comprised of a pyrolyzed polyacrylonitrile.

Abstract: A photoconductive imaging member including a supporting substrate, a hole blocking layer thereover, a crosslinked photogenerating layer and a charge transport layer, and wherein the photogenerating layer includes a photogenerating component and a vinyl chloride, allyl glycidyl ether, hydroxy containing polymer.

Abstract: A coating liquid for an electrophotographic photoconductor intermediate layer comprising a titanium oxide and a polycarboxylic acid polymer in a solvent is provided. The content of the polycarboxylic acid polymer is 0.3 to 10 parts by weight in respect to 100 parts by weight of the titanium oxide, and an acid value of the polycarboxylic acid polymer is 30 to 400 mgKOH/g.

Abstract: A photoconductive imaging member including a hole blocking layer, a photogenerating layer, and a charge transport layer, and wherein the hole blocking layer contains, for example, a metal oxide; and a mixture of a phenolic compound and a phenolic resin, and wherein the phenolic compound can contain at least two phenolic groups.

Abstract: A photoconductive imaging member including a hole blocking layer, a photogenerating layer, and a charge transport layer, and wherein the hole blocking layer contains, for example, a metal oxide dispersed in an in situ formed inorganic/organic network wherein the inorganic component is silica, titania or zirconia, and the organic component is a mixture of a phenolic compound and a phenolic resin, and wherein the phenolic compound can contain, for example, at least two phenolic groups.

Abstract: A photoconductive imaging member comprised of a supporting substrate, a hole blocking layer thereover, a photogenerating layer, and a charge transport layer, and wherein the hole blocking layer is comprised of particles chemically attached on the surface of an electron transport component.

Abstract: A photoconductive imaging member including a hole blocking layer, a photogenerating layer, and a charge transport layer, and wherein the hole blocking layer contains, for example, a metal oxide; and a mixture of a phenolic compound and a phenolic resin, and wherein the phenolic compound can contain at least two phenolic groups.

Abstract: An electrophotographic photoreceptor having an interlayer between an electroconductive support and a photoreceptive layer, wherein the interlayer contains an N-type semiconductive particle and a binder and a Benard cell is formed in the interlayer.

Abstract: A photoreceptor including an electroconductive substrate; an undercoat layer located overlying the electroconductive substrate and including titanium oxide which has an average particle diameter greater than 0.05 ?m and less than 0.20 ?m and which includes rutile titanium oxide in an amount of from 10 to 100% by weight based on total weight of the titanium oxide; and a photosensitive layer located overlying the undercoat layer.

Abstract: A photoconductive imaging member comprised of a supporting substrate, a hole blocking layer thereover, a photogenerating layer, and a charge transport layer, and wherein the hole blocking layer is comprised of a metallic component and an electron transport component.

Abstract: A photoconductive imaging member containing a hole blocking layer, a photogenerating layer, a charge transport layer, and thereover an overcoat layer comprised of a polymer with a low dielectric constant and charge transport molecules.

Abstract: A photoconductive imaging member containing a photogenerating layer, a charge transport layer, or a plurality of charge transport layers, and which charge transport, especially the top charge transport layer contains a vinyl containing organic compound.

Abstract: A photoconductive imaging member including a hole blocking layer, a photogenerating layer, and a charge transport layer, and wherein the hole blocking layer contains, for example, a metal oxide dispersed in an in situ formed inorganic/organic network wherein the inorganic component is silica, titania or zirconia, and the organic component is a mixture of a phenolic compound and a phenolic resin, and wherein the phenolic compound can contain, for example, at least two phenolic groups.

Abstract: A photoconductive imaging member comprised of a supporting substrate, a hole blocking layer thereover, a photogenerating layer, and a charge transport layer, and wherein the hole blocking layer is comprised of a metallic component and an electron transport component.

Abstract: A photoconductive imaging member comprised of a substrate, a photogenerating layer, and a charge transport layer containing a binder and a compound containing at least two (methyl)acrylates.

Abstract: A flexible electrophotographic imaging member comprising a supporting substrate, at least one imaging layer on one side of the supporting substrate, a charge blocking layer, an optional adhesive layer, a charge-generating layer, a charge transporting layer, a seam overcoat layer comprising a coating solution of a co-polyester resin and having a thickness of from about 2 to about 4 micrometers and having a width of from about 2 to about 10 millimeters and wherein said co-polyester resin is present in an amount of from about 2 to about 40 percent by weight based on the total weight of said overcoat layer, and a binder. The imaging member exhibits an excellent life cycle; excellent wear resistance, excellent electrical performance, and outstanding print quality.

Abstract: A charge transport layer for an imaging member comprising a photogenerating layer, (1) a first charge transport layer comprised of a charge transport component and a resin binder, and thereover and in contact with the first layer (2) a second top charge transport layer comprised of a charge transport component, and a polymer of a styrene containing hindered phenol. The charge transport layer exhibits excellent wear resistance, excellent electrical performance, and outstanding print quality.

Abstract: A photoconductive imaging member containing a hole blocking layer, a photogenerating layer, a charge transport layer, and thereover an overcoat layer comprised of a polymer With a low dielectric constant and charge transport molecules.

Abstract: A photoconductive imaging member including a supporting substrate, a hole blocking layer thereover, a crosslinked photogenerating layer and a charge transport layer, and wherein the photogenerating layer includes a photogenerating component and a vinyl chloride, allyl glycidyl ether, hydroxy containing polymer.

Abstract: A photoconductive imaging member including a hole blocking layer, a photogenerating layer, and a charge transport layer, and wherein the hole blocking layer contains, for example, a metal oxide; and a mixture of a phenolic compound and a phenolic resin, and wherein the phenolic compound can contain at least two phenolic groups.

Abstract: A photoconductive imaging member comprised of a substrate, a photogenerating layer, and a charge transport layer containing a binder and a compound containing at least two (methyl)acrylates.

Abstract: A coating liquid for an electrophotographic photoconductor intermediate layer comprising a titanium oxide and a polycarboxylic acid polymer in a solvent is provided. The content of the polycarboxylic acid polymer is 0.3 to 10 parts by weight in respect to 100 parts by weight of the titanium oxide, and an acid value of the polycarboxylic acid polymer is 30 to 400 mgKOH/g.

Abstract: An image forming apparatus including at least an image irradiator configured to irradiate a photoreceptor with a coherent light beam while scanning to form pixel light spots thereon for forming an electrostatic latent image thereon, wherein the light spots overlap with adjacent light spots; and an image developer configured to develop the electrostatic latent image with a developer, wherein the photoreceptor comprises an intermediate layer located overlying an electroconductive substrate, a charge generation layer located overlying the intermediate layer and a charge transport layer located overlying the charge generation layer, wherein the charge generation layer satisfies the following relationship: T1≦3.5% wherein T1 represents a relative mirror reflectance of the charge generation layer against the coherent light beam when the coherent light beam irradiates the charge generation layer at an incident angle of 5°.

Abstract: An electrophotographic photoreceptor having, between an electroconductive substrate and a photosensitive layer, an interlayer which contains fine metal oxide particles and a binder resin and which, when an electric field of 106 V/m is applied thereto at 28° C. and 85% RH, has a volume resistivity of from 108 to 1013 &OHgr;·cm and, when an electric field of 106 V/m is applied thereto at 15° C. and 15% RH, has a volume resistivity which is up to 500 times the volume resistivity thereof as measured when an electric field of 106 V/m is applied thereto at 28° C. and 85% RH.

Abstract: A charge transport layer for an imaging member comprising a charge transport layer wherein the charge transport layer is coated in two passes and wherein the second pass comprises the application of a charge transport component and a hindered phenol covalently bonded to a polymer. The charge transport layer exhibits excellent wear resistance, excellent electrical performance, and excellent print quality.

Abstract: A charge transport layer for an imaging member comprising a charge transport layer wherein the charge transport layer comprises the application of charge transport molecules and a poly(fluoroacrylate)-graft-poly(methyl methacrylate) surfactant. The charge transport layer exhibits excellent wear resistance, excellent electrical performance, excellent print quality and decreased crystallization of the charge transport component.

Abstract: A polymer has stilbenquinone structures as a repetitive unit and an electrophotographic photoreceptor containing the polymer. More particularly, the polymer has an improved electro-transporting capacity in that precipitation does not occur even when the polymer is used as an electron transporter for an electrophotographic photoreceptor in a high concentration.

Abstract: An imaging member including, for example, a substrate, a charge blocking layer, an optional adhesive layer, a charge generating layer, a charge transporting layer comprising, and a film forming polymer binder substantially free of low molecular weight fractions.

Abstract: The object of the present invention is to provide an electrophotography photosensitive body substrate, photosensitive body, and electrophotography device used in a contact charging process that can prevent the occurrence of minor insulation damage of around diameter 0.1-0.5 mm. In an electrophotography photosensitive body substrate having a sealed aluminum anodic oxidation film on its surface, the anodic oxidation film is sealed by a sealing agent in which an anion surface active agent is beneficially added.

Abstract: An electrophotographic photoconductor, including an electrically conductive substrate, an undercoat layer containing a filler and a binder resin and provided on the substrate, and a photoconductive layer provided on the undercoat layer and containing a binder resin. At least one compound selected from crown ethers, polyalkyleneglycol ethers, polyethyleneglycol monocarboxylic acid esters, polyethyleneglycol dicarboxylic acid esters, and hydroxy-terminated random or block copolymers containing oxypropylene and oxyethylene groups is incorporated into (a) the undercoat layer or (b) into a charge generating layer of the photoconductive layer. In the case of (a), the photoconductive layer is a dried coating of a composition containing at least one solvent selected from cyclic ethers, ketones and aromatic hydrocarbons.

Abstract: A negative-charging electrophotographic photosensitive member comprising an aluminum-based substrate and a silicate film and a light-receiving layer in this order. The silicate film has a layer thickness of 0.5 nm to 15 nm and comprises at least aluminum atoms, silicon atoms and oxygen atoms. The light-receiving layer has at least a lower-part charge injection blocking layer formed of a non-single crystal silicon film comprising at least silicon atoms, nitrogen atoms and oxygen atoms, not doped with any impurities, a photoconductive layer formed of a non-single crystal silicon film comprising at least silicon atoms, an upper-part charge injection blocking layer formed of a non-single crystal silicon film comprising at least silicon atoms, carbon atoms and atoms belonging to the Group 13 of the periodic table, and a surface protective layer formed of a non-single crystal silicon film comprising at least silicon atoms and containing carbon atoms.

Abstract: An electrophotographic photoreceptor is disclosed.

Abstract: An electrophotographic photosensitive member exhibiting good potential characteristic and image forming characteristic fee from difficulties, such as lower image density, black spots and fog or interference fringes in halftone images, over wide temperature and humidity environment condition, is provided by inserting a specific intermediate layer between a support and a photosensitive layer. The intermediate layer comprises at at least 0.5 &mgr;m-thick layer of aggregated particles having a composition represented by formula (1) below: Al2O3.nH2O  (1), wherein n is a number of at least 0 representing a degree of hydration.

Abstract: The invention provides an electrophotographic photoreceptor, in which suppression of image defects and high sensitivity are compatible, and a method for production thereof. The invention also provides a coating fluid for forming a photosensitive layer and a method for production thereof, as well as an image-forming apparatus using said electrophoto-graphic photoreceptor. Briefly, the electrophoto-graphic photoreceptors may be constructed by forming an undercoating layer on a conductive support, and then forming a photosensitive layer on the undercoating layer. The undercoating layer contains titanium oxide particles in at least either needle shape or dendrite shape. The photosensitive layer contains an electric charge-generating material of which the primary particle size and cohesive particle size are in a range of 0.01 &mgr;m-10 &mgr;m. Accordingly, in the electrophotographic photoreceptors, it is possible to maintain high sensitivity and excellent durability and to form an image with no defect.

Abstract: An electrophotographic photoreceptor is disclosed. The photoreceptor has an interlayer between an electroconductive substrate and a photosensitive layer wherein the interlayer contains a particle and has a light absorbance of not more than 0.25 per micrometer of thickness at a wavelength of 1,000 nm. An image forming apparatus and a processing cartridge employing the photoreceptor are also disclosed.

Abstract: An electrophotographic photoreceptor having, between an electroconductive substrate and a photosensitive layer, an interlayer which contains fine metal oxide particles and a binder resin and which, when an electric field of 106 V/m is applied thereto at 28° C. and 85% RH, has a volume resistivity of from 108 to 1013 &OHgr;·cm and, when an electric field of 106 V/m is applied thereto at 15° C. and 15% RH, has a volume resistivity which is up to 500 times the volume resistivity thereof as measured when an electric field of 106 V/m is applied thereto at 28° C. and 85% RH.

Abstract: A photoreceptor including an electroconductive substrate; an undercoat layer located overlying the electroconductive substrate and including titanium oxide which has an average particle diameter greater than 0.05 &mgr;m and less than 0.20 &mgr;m and which includes rutile titanium oxide in an amount of from 10 to 100% by weight based on total weight of the titanium oxide; and a photosensitive layer located overlying the undercoat layer.

Abstract: A negative-charging electrophotographic photosensitive member comprising an aluminum-based substrate and a silicate film and a light-receiving layer in this order. The silicate film has a layer thickness of 0.5 nm to 15 nm and comprises at least aluminum atoms, silicon atoms and oxygen atoms. The light-receiving layer has at least a lower-part charge injection blocking layer formed of a non-single crystal silicon film comprising at least silicon atoms, nitrogen atoms and oxygen atoms, not doped with any impurities, a photoconductive layer formed of a non-single crystal silicon film comprising at least silicon atoms, an upper-part charge injection blocking layer formed of a non-single crystal silicon film comprising at least silicon atoms, carbon atoms and atoms belonging to the Group 13 of the periodic table, and a surface protective layer formed of a non-single crystal silicon film comprising at least silicon atoms and containing carbon atoms.

Abstract: An electrophotographic photoreceptor having at least an undercoat layer and a photosensitive layer on an electroconductive substrate, wherein at least one layer of the undercoat layer contains a naphthalocyanine compound of the following formula (1): 1

Abstract: An electrophotographic photoreceptor having an interlayer between an electroconductive support and a photoreceptive layer, wherein the interlayer contains an N-type semiconductive particle and a binder and a Benard cell is formed in the interlayer.

Abstract: An object of the invention is to provide a multi-layered type electrophotographic photoreceptor in which a low-cost porthole tube is used as an electrically conductive support, and an electrophotographic apparatus using the electrophotographic photoreceptor. In the electrophotographic photoreceptor having the multi-layered type photosensitive layer, the porthole tube is used as the electrically conductive support, and an undercoat layer containing titanium oxide and a polyamide resin is provided between the porthole tube and the photosensitive layer.

Abstract: The object of the present invention is to provide an electrophotography photosensitive body substrate, photosensitive body, and electrophotography device used in a contact charging process that can prevent the occurrence of minor insulation damage of around diameter 0.1-0.5 mm.