Abstract: An organic photoreceptor is described. The photosensitive layer contains a pyranthrone compound represented by Formula 1 which has been subjected to purification processing so as to have a mass reduction ratio D400/450 between 400° C. and 450° C. of not more than 2.0% in a thermogravimetric analysis; D400/450={(G400?G450)/Gi}×100 wherein Gi is a mass at 25° C., and G400 and G450 are each mass at 400° C. and 450° C., respectively, wherein R1 through R14 are each a hydrogen atom, an alkyl group, an alkoxy group, an aryl group, a halogen atom, a cyano group or a nitro group. The image forming method using the photoreceptor, and the pyranthrone compound are also disclosed.

Abstract: The present invention provides a polymer material having a carrier transport property. The polymer material has first and second states in which degrees of the carrier transport property are different from each other, microscopic structures in the first and second states are different from each other, and one of the first and second states can be changed into the other state.

Abstract: Improved organophotoreceptor comprises an electrically conductive substrate and a photoconductive element on the electrically conductive substrate, the photoconductive element comprising: (a) a polymeric charge transport material having the formula where n and m are each a distribution of integers, and the n units of R1—Si—X1—Ar1 and m units of R2—Si—X2—Ar2—X3-Z form either a random, an alternative, or a block copolymer; R1 and R2 comprise, each independently, an alkyl group, an alkoxy group, an alkenyl group, an alkynyl group, a heterocyclic group, or an aromatic group; X1, X2, and X3 comprise, each independently, a bond or a linking group; A1 and A2 are each a terminal group; Ar1 and Ar2 comprise, each independently, an aromatic group; and Z comprises a functional group; and (b) a charge generating compound. Corresponding electrophotographic apparatuses, imaging methods, and methods of preparing the polymeric charge transport material are described.

Abstract: Improved organophotoreceptor comprises an electrically conductive substrate and a photoconductive element on the electrically conductive substrate, the photoconductive element comprising: (c) a charge transport material having the formula: R1—N?N—Ar1—X—Ar2—N?N—R2 where R1 and R2 comprise, each independently, a 4-oxo-2,5-cyclohexadiene-1-ylidenyl group; X comprises oxy, thio, sulfonyl, sulfinyl, sulfonyldioxy, azo, carbonyl, thiocarbonyl, carbonyldioxy, oxalyl, an arylene group, an arylenebisazo group, an imino group, a hydrazo group, a carbonimidoyl group, a vinylene group, or a combination thereof; and Ar1 and Ar2 comprise, each independently, an aromatic group; and (b) a charge generating compound. Corresponding electrophotographic apparatuses, imaging methods, and the charge transport material are also described.

Abstract: To provide a highly sensitive and highly durable electrophotographic photoconductor, electrophotography, photographic apparatus and process cartridge for the electrophotographic apparatus which is practical for a high-speed copying machine as well as for a laser printer. The electrophotographic photoconductor includes a photoconductive layer on a conductive support, in which the photoconductive layer contains an azo compound expressed by Formula (1) and wherein at least one of “Cp1” and “Cp2” contains a coupler residue selected from Formula (2), Formula (3) and Formula (4).

Abstract: The present invention provides a diphenyl amine derivative having the excellent solubility to a solvent and compatibility to a binding resin, an efficient production method therefor, and an electrophotographic photoconductor having the excellent sensitivity, capable of effectively preventing generation of the black dots. A diphenyl amine derivative represented by the following general formula (1) is used: (In the general formula (1), R1 to R12 each are a hydrogen atom, an alkyl group which may have a substituent, or the like, Z is a ring structure linked with a benzene ring, which is a 4 to 8-membered ring including a hydrogen atom, a nitrogen atom, an oxygen atom, a carbon atom or a sulfur atom, m1, m2, n1, n2 each are 0 or 1, m1+n1 is 1 or 2, and m2+n2 is 1 or 2.

Abstract: Improved organophotoreceptor comprises an electrically conductive substrate and a photoconductive element on the electrically conductive substrate, the photoconductive element comprising: (a) a charge transport material having the formula, where R comprises a hydrogen, an alkyl group, an alkenyl group, a heterocyclic group, or an aromatic group; X comprises an arylamine group; and Y comprises a 9-fluorenylidene group having at least a solubilizing substituent; and (b) a charge generating compound. Corresponding electrophotographic apparatuses and imaging methods are described.

Abstract: A photoconductive member containing a supporting substrate, a photogenerating layer, and a charge transport layer and wherein the photogenerating layer comprises a photogenerating component, and an electron transport component.

Abstract: This invention relates to an electrophotographic photosensitive member having a support and a photosensitive layer.

Abstract: Compounds that are suitable to be used for three-dimensional optical recording materials, etc. The compounds each have a structure that allows pi-electron conjugation to be achieved by linking a porphyrin ring and a perinaphthothioindigo ring to each other with a straight-chain atomic group. The compounds of the present invention are suitable to be used for three-dimensional optical recording materials, etc. since they have a high two-photon absorption efficiency and undergo photochromism effectively through optical absorption.

Abstract: A charge transport layer composition for a photoreceptor includes at least a binder, at least one arylamine charge transport material, e.g., N,N?-diphenyl-N,N?-bis(3-methylphenyl)-(1,1?-biphenyl)-4,4?-diamine, and at least one polymer containing carboxylic acid groups or groups capable of forming carboxylic acid groups. The charge transport layer forms a layer of photoreceptor, which also includes an optional anti-curl layer, a substrate, an optional hole blocking layer, an optional adhesive layer, a charge generating layer, and optionally one or more overcoat or protective layers.

Abstract: An organic photoconductive material which is useful as a raw material compound for a variety of functional materials and makes it possible to implement an electrophotoconductor which is excellent in terms of the charge transporting performance, excellent in terms of dissolution in solvents and compatibility with resins, and excellent in terms of both the electrical properties and durability is provided. An example is an asymmetric bishydroxy compound which can be represented by the following structural formula (1aa). This compound is contained in a charge transforming layer 4 or a surface protective layer 5 of an electrophotoconductor 18. As a result, an electrophotoconductor 18 which is excellent in terms of the electrical properties and durability and can stably form high quality images without image defects such as black dots can be implemented.

Abstract: Disclosed are highly efficient multiphoton absorbing compounds and methods of their use. The compounds generally include a bridge of pi-conjugated bonds connecting electron donating groups or electron accepting groups. The bridge may be substituted with a variety of substituents as well. Solubility, lipophilicity, absorption maxima and other characteristics of the compounds may be tailored by changing the electron donating groups or electron accepting groups, the substituents attached to or the length of the pi-conjugated bridge. Numerous photophysical and photochemical methods are enabled by converting these compounds to electronically excited states upon simultaneous absorption of at least two photons of radiation. The compounds have large two-photon or higher-order absorptivities such that upon absorption, one or more Lewis acidic species, Lewis basic species, radical species or ionic species are formed.

Abstract: An arylamine compound represented by formula (1). Ar1 represents a phenyl group substitued by a substituted or unsubstituted monovalent polycyclic aromatic hydrocarbon group, and a substituted or unsubstituted monovalent heterocyclic group. Ar2 represents a substituted or unsubstituted arylene group. R1 represents a hydrogen atom, a halogen atom, an alkoxy group, or a substituted or unsubstituted alkyl group. R2 represents a hydrogen atom, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group. R3 and R4 each independently represents a hydrogen atom, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group, at least one of R3 and R4 represents a substituted or unsubstituted aryl group, and R3 and R4 may be bound to form a ring via a single bond or a divalent group. m represents an integral of from 0 to 4.

Abstract: A photoconductor having a charge generation layer and a charge transport layer, the charge transport layer having hydrazone or aryl amine charge transport molecules and also having as room light protective additives acetosol yellow 5GLS and tetraphenylcyclopentadienone or 9-fluorenone. Preferably the amount of the acetosol yellow is 2 to 4 percent by weight of the weight of the charge transfer layer and the ratio of weight between the acetosol yellow and the dienone or fluorenone is in the range of 1:1 to 1:3.

Abstract: An electrophotographic photoconductor including an electroconductive support and a photoconductive layer formed thereon, which contains a phthalocyanine pigment and a disazo pigment of formula (I): wherein A and B are coupler radicals having different structures.

Abstract: Improved organophotoreceptor comprises an electrically conductive substrate and a photoconductive element on the electrically conductive substrate, the photoconductive element comprising: (a) a charge transport compound having the formula where R1 and R2 are, independently, hydrogen, an alkyl group, an alkaryl group or an aryl group; X is an aromatic group; Y is an (N,N-disubstituted)arylamine; Z is (CH2)m group where m is an integer between 0 and 30 where one or more of the methylene groups is optionally replaced by O, S, C?O, O?C—O, O?C—NR3, sulfoxide, sulfate, phosphate, an aryl group, urethane, urea, NR4 group, CHR5 group, or CR6R7 group where R3, R4, R5, R6, and R7 are, independently, H, hydroxyl, thiol, an amine group, an alkyl group, an alkaryl group, a heterocyclic group, or an aryl group, and E is a bond, O, S, C?O, NR8, CR9R10 group, a hetrocyclic group, or an aromatic group where R8, R9, and R10 are, independently, H, an alkyl group, an alkaryl group, or an aryl group; and (b) a charg

Abstract: The invention is to provide an organic photoconductive material capable of realizing electrophotographic photoreceptors of high reliability that have high charge potential, high sensitivity, good responsiveness to light and good durability, of which the characteristics do not lower even when they are driven at low temperatures or at high speed and even when they are exposed to light, and to provide an electrophotographic photoreceptor that comprises the material and an image-forming apparatus. An organic photoconductive material of the following general formula (1), for example, an enamine compound of the following structural formula (1-1) is produced.

Abstract: Improved organophotoreceptor comprises an electrically conductive substrate and a photoconductive element on the electrically conductive substrate, the photoconductive element comprising: (a) a charge transport material having the formula where R1, R2, R3, and R4 comprise, each independently, an alkyl group, an alkenyl group, an aromatic group, a heterocyclic group, or a part of a ring group; X and X? comprise, each independently, an aromatic group; Y and Y? comprise, each independently, a (disubstituted)methylene group; and Z is a linking group; (b) a charge generating compound; and (c) an electrically conductive substrate on which said charge transport material and said charge generating compound are located. Corresponding electrophotographic apparatuses and imaging methods are also described.

Abstract: Improved organophotoreceptor comprises an electrically conductive substrate and a photoconductive element on the electrically conductive substrate, the photoconductive element comprising: (a) a charge transport material having the formula X-Z-X? where X and X? are, each independently, a (9-fluorenylidene)malononitrile group, and Z is a linking group; and (b) a charge generating compound. Corresponding electrophotographic apparatuses and imaging methods are described.

Abstract: A photoconductive imaging member containing a supporting substrate, and thereover a single layer comprised of a photogenerator component, a charge transport component, an electron transport component, and a polymer binder.

Abstract: A naphthoquinone derivative is utilized in an electrophotographic photoreceptor as an electron-transporting material. The electrophotographic photoreceptor is improved in terms of solubility in an organic solvent, compatibility with a binder resin, and electron transport capability.

Abstract: A photoconductive imaging member comprised of a supporting substrate, and thereover a single photoactive layer comprised of a mixture of a photogenerator component, an electron transport component, a transport component, and a polymeric binder; and wherein said photogenerating component is comprised of a mixture of a metal free phthalocyanine and a hydroxygallium phthalocyanine.

Abstract: Improved organophotoreceptor comprises an electrically conductive substrate and a photoconductive element on the electrically conductive substrate, the photoconductive element comprising: (a) a charge transport material having the formula where the formula is described in the especification; and ?(b) a charge generating compound.

Abstract: Improved organophotoreceptor comprises an electrically conductive substrate and a photoconductive element on the electrically conductive substrate, the photoconductive element comprising: (a) a charge transport material having the formula ?where n is an integer between 2 and 6, inclusive; R1 and R2 are, independently, H, halogen, carboxyl, hydroxyl, thiol, cyano, nitro, aldehyde group, ketone group, an ether group, an ester group, a carbonyl group, an alkyl group, an alkaryl group, or an aryl group; X is a linking group having the formula —(CH2)m—, branched or linear, where m is an integer between 0 and 20, inclusive, and one or more of the methylene groups can be optionally replaced by O, S, C?O, O?S?O, a heterocyclic group, an aromatic group, urethane, urea, an ester group, a NR3 group, a CHR4 group, or a CR5R6 group where R3, R4, R5, and R6 are, independently, H, an alkyl group, an alkaryl group, a heterocyclic group, or an aryl group; Y comprises a bond, C, N, O, S, a branched or linear —(CH2)p— gr

Abstract: An acrylic polymer suitable for use as a charge transport material, the acrylic polymer containing pendant ?-conjugated groups represented by the following general formula (1) and having a triad syndiotacticity or triad isotacticity of at least 60%: wherein in the formula (1), Ar represents an aromatic group, R1 represents hydrogen or a methyl group, R2 represents an organic group or none, R3 and R4 both represent hydrogen or at least one of them represents an electron-donating or electron-withdrawing group, and n denotes an integer of 2 or larger.

Abstract: An electrophotographic photosensitive member is provided having a support and a photosensitive layer provided on the support and containing at least one kind of charge-transporting material which has a specific structure with a molecular weight of from 1,500 to 4,000, and is held in a proportion of from 90% by weight to 100% by weight based on the total weight of the charge-transporting material.

Abstract: The present invention relates to an electrophotographic photosensitive member having a support and provided thereon a photosensitive layer. The photosensitive layer contains a high-molecular weight charge-transporting material having a specific repeating structural unit. The high-molecular weight charge-transporting material has a weight-average molecular weight Mw of 1,500 or more and an energy level of highest occupied molecular orbital, EHOMO, of from ?8.3 eV or more to ?8.0 eV or less as found by semiempirical molecular-orbital calculation. The present invention also relates to a process cartridge and an electrophotographic apparatus which have such an electrophotographic photosensitive member.

Abstract: Improved organophotoreceptors comprise: (a) a charge transport compound having the formula where n is an integer from 0 to 1; X is an (N,N-disubstituted)arylamine group; Ar is an aryl group or a heterocyclic group; A is a first linking group with the formula —(CH2)p— which can be branched or linear, where p is an integer from 3 to 20 inclusive; and B is a second linking group having the formula -Q-Z-Q?-, where Q and Q? are, independently, O, S, or NR1; wherein when Q or Q? is NR1 or Q=O and Q?=S, Z comprises an aryl group, and wherein when Q=Q?=S or Q=Q?=O, Z comprises a multi-ring conjugated group or Y—W—Y?, where the groups R1, Y, W, and Y? are defined in the specification; (b) a charge generating compound; and (c) an electrically conductive substrate over which said charge transport compound and said charge generating compound are located.

Abstract: An electrophotographic photoconductor including an electroconductive support and a photoconductive layer formed thereon, which contains a phthalocyanine pigment and a disazo pigment of formula (I): wherein A and B are coupler radicals having different structures.

Abstract: An electrophotographic photosensitive member includes a charge generating material and a charge transfer material. The charge transfer material contains a triarylamine compound synthesized from an amine compound and an aryl halide in the presence of a catalyst comprising a phosphine compound represented by formula (1) and a palladium compound: wherein Ar1 to Ar3 are each independently an alkyl or aryl group which may have a substituent group, and at least one of Ar1 to Ar3 is an aryl group. A process cartridge includes the electrophotographic photosensitive member.

Abstract: The invention generally relates to the use of poly-3,3?-dialkyl-2,2?:5?,2?-terthiophenes as charge transport materials or semiconductors in electrooptical, electronic or electroluminescent devices, and to charge transport and semiconducting components and devices comprising poly-3,3?-dialkyl-2,2?:5?,2?-terthiophenes.

Abstract: A photoconductive imaging member containers of a supporting substrate, and thereover a single layer comprised of a mixture of a photogenerator component, a charge transport component, an electron transport component, and a polymer binder, and wherein the photogenerating component is a pigment.

Abstract: This invention relates to a novel organophotoreceptor that includes: (a) a charge transport compound having the formula where n is an integer from 0 to 1 inclusive; X is an (N,N-disubstituted)arylamine, such as a carbazole group, a julolidine group, or a p-(N,N-disubstituted)arylamine group (which can be a triarylamine, an alkyldiarylamine or a dialkylarylamine); Ar is an aryl group or a heterocyclic group; A is a linking group having the formula —S—(CH2)m—S— where m is an integer from 1 to 15 inclusive and; B is a second linking group with the formula —(CH2)p— which can be branched or linear, where p is an integer from 3 and 20 inclusive and where one or more methylene groups can be optionally replaced by O, S, a carbonyl group, urethane, urea, an ester group, a —NR21 group, a CHR22 group, or a CR23R24 group where R21, R22, R23 and R24 are, independently, H, hydroxyl, thiol, an amine group, an alkyl group, an alkaryl group, an aryl group, or part of a ring; (b) a charge generating compound; and (c)

Abstract: Improved organophotoreceptor comprises an electrically conductive substrate and a photoconductive element on the electrically conductive substrate, the photoconductive element comprising:

Abstract: This invention includes an improved organophotoreceptor having an electrically conductive substrate and a photoconductive element on the electrically conductive substrate where the photoconductive element comprises:

Abstract: This invention relates to a novel organophotoreceptor that includes: (a) a charge transport composition comprising molecules having the formula where the average n is between 1 and 1000; R1 and R2 are, independently, hydrogen, a branched or linear alkyl group (e.g., a C1-C30 alkyl group), a branched or linear unsaturated hydrocarbon group, an ether group, a cycloalkyl group (e.g. a cyclohexyl group), or an aryl group (e.g., a phenyl or naphthyl group); X is a bis(fluorene-4-carboxyl)alkane group; Y is a divalent sulfonyldiphenylene group; Z is X═O where X is double-bonded to the adjacent N or two hydrogens where each hydrogen is independently single-bonded to the adjacent N; and Q is O or N—N(R1)—Y—N(R2)—NH2; (b) a charge generating compound; and (c) an electrically conductive substrate over which said charge transport composition and said charge generating compound are located.

Abstract: Improved organophotoreceptor comprises an electrically conductive substrate and a photoconductive element on the electrically conductive substrate, the photoconductive element comprising:

Abstract: An electrophotographic photoconductor including an electroconductive support and a photoconductive layer formed thereon, which contains a phthalocyanine pigment and a disazo pigment of formula (I): 1

Abstract: A photoconductive imaging member comprised of a supporting substrate, and thereover a single layer comprised of a mixture of a photogenerator component, charge transport components, and a certain electron transport component, and a certain polymer binder.

Abstract: An electrophotographic photoreceptor having a photosensitive layer containing, as a charge transporting material, at least one indane compound of the formula (1), and at least one polycarbonate resin of the formula (4) and/or an organic additive containing at least one atom selected from the group consisting of nitrogen, oxygen, phosphorus and sulfur for an electrophotographic photoreceptor.

Abstract: Improved organophotoreceptor comprises an electrically conductive substrate and a photoconductive element on the electrically conductive substrate, the photoconductive element comprising:

Abstract: A naphthoquinone derivative is utilized in an electrophotographic photoreceptor as an electron-transporting material. The electrophotographic photoreceptor is improved in terms of solubility in an organic solvent, compatibility with a binder resin, and electron transport capability.

Abstract: An organic optoelectronic device includes a solution coatable thin film having a hole transporting material, an electron transporting material, and a photogenerating component uniformly dispersed therein. The thin film is about 0.2 microns or less, and can be spin-coated onto a substrate and further coated with electrodes.

Abstract: A member including for example, a supporting layer and a single photogenerating layer, the photogenerating layer comprising particles including hydroxygallium phthalocyanine phthalocyanine Type V, x polymorph metal free phthalocyanine, or chlorogallium phthalocyanine dispersed in a matrix comprising an arylamine hole transporter and an electron transporter selected from the group consisting of N,N′bis(1,2-dimethylpropyl)-1,4,5,8-naphthalenetetracarboxylic diimide, 1,1′-dioxo-2-(4-methylphenyl)-6-phenyl-4-(dicyanomethylidene)thiopyran, and a quinone selected from the group consisting of carboxybenzylhaphthaquinone, and tetra (t-butyl) diphenoquinone, and mixtures thereof, and a film forming binder.

Abstract: An electrophotography photosensitive body has a single layer photosensitive layer on top of a conductive substrate, directly or via an undercoat layer. The single layer photosensitive layer contains at least a resin binder, a charge generating substance, and a charge transport substance, wherein at least one of the charge generating substances is a titanyl phthalocyanine, which, in a x-ray powder diffraction spectrum having a radiation source of CuK &agr; and within a range of a Bragg angle 2&thgr;=5˜35°, a ratio, R, of a value, P, of a diffraction intensity of a highest peak and a value, B, of a diffraction intensity of the background satisfies the equation R=(P−B)/B≦7.0. The resulting electrophotographic photosensitive layer shows excellent electrical properties with positive charging as well as excellent stability when repeatedly used.

Abstract: The invention is to provide an organic photoconductive material capable of realizing electrophotographic photoreceptors of high reliability that have high charge potential, high sensitivity, good responsiveness to light and good durability, of which the characteristics do not lower even when they are driven at low temperatures or at high speed and even when they are exposed to light, and to provide an electrophotographic photoreceptor that comprises the material and an image-forming apparatus. An organic photoconductive material of the following general formula (1), for example, an enamine compound of the following structural formula (1-1) is produced. Using the organic photoconductive material for the charge-transporting substance to be in a photosensitive layer on a conductive support, an electrophotographic photoreceptor is fabricated, and this is mounted on an image-forming apparatus.

Abstract: An organophotoreceptor that includes: (a) a charge transport compound having the formula  where R1 and R2 are, independently, a fluorenyl group; R3 and R4 are, independently, hydrogen, an alkyl group, an aryl group, or a heterocyclic group; and X is a sulfonyldiphenylene group; (b) a charge generating compound; and (c) an electrically conductive substrate.

Abstract: A member including for example, a supporting layer and a single photogenerating layer, the photogenerating layer comprising particles including hydroxygallium phthalocyanine phthalocyanine Type V, x polymorph metal free phthalocyanine, or chlorogallium phthalocyanine dispersed in a matrix comprising an arylamine hole transporter and an electron transporter selected from the group consisting of N,N′bis(1,2-dimethylpropyl)-1,4,5,8-naphthalenetetracarboxylic diimide, 1,1′-dioxo-2-(4-methylphenyl)-6-phenyl-4-(dicyanomethylidene)thiopyran, and a quinone selected from the group consisting of carboxybenzylhaphthaquinone, and tetra (t-butyl) diphenoquinone, and mixtures thereof, and a film forming binder.

Abstract: A single-layered electrophotographic photoreceptor has a single-layered structure that includes a charge generating material, a charge transfer material, and a binder resin on a substrate. In one embodiment, the charge generating material is Y form titanyloxy phthalocyanine, and the binder resin is polyethylene terephthalate polymer. The single-layered electrophotographic photoreceptor has excellent stability, electrical characteristics, sensitivity and durability, and may be installed in a cartridge or on a drum of an image forming apparatus.