Abstract: An electrophotographic photosensitive member includes a support and a photosensitive layer in this order. The photosensitive layer contains a chlorogallium phthalocyanine crystal obtained by mixing a hydroxygallium phthalocyanine crystal and an aqueous hydrochloric acid solution.

Abstract: An electrophotographic photosensitive member can provide images in which black spots and fogging are suppressed and density unevenness due to coating unevenness of the charge generation layer is suppressed. The charge generation layer of the electrophotographic photosensitive member contains a gallium phthalocyanine crystal, a nitrogen-containing heterocyclic compound, and an amide compound represented by a formula (1), and a nitrogen atom in a heterocyclic ring of the nitrogen-containing heterocyclic compound has a substituent.

Abstract: An electrophotographic photosensitive member including a support, and a charge generating layer and a charge transporting layer on the support, wherein the charge generating layer includes a gallium phthalocyanine crystal in which an organic compound is contained, wherein the organic compound is at least one compound selected from the group consisting of dimethylsulfoxide, N,N-dimethylformamide, N-methylformamide, N-propylformamide, N-vinylformamide and N-methylpyrrolidone, the content of the organic compound is 0.1% by mass or more and 1.5% or less based on a gallium phthalocyanine in the gallium phthalocyanine crystal, and the charge transporting layer includes a polyester resin having a structural unit represented by formula (1). A-B??(1).

Abstract: An electrophotographic photosensitive member capable of outputting an image with suppressed positive ghosting, and a process cartridge and an electrophotographic apparatus each having the electrophotographic photosensitive member are provided. The electrophotographic photosensitive member has a photosensitive layer including a phthalocyanine crystal in which the compound represented by the formula (1) is contained, wherein the content of the compound represented by the formula (1) is 0.1% by mass or more and 1.7% by mass or less based on the phthalocyanine crystal.

Abstract: An electrophotographic photosensitive member includes a substrate and a photosensitive layer containing a phthalocyanine pigment. The crystalline particles of the phthalocyanine pigment have a crystallite correlation length r and a particle size R of 400 nm or less, and a parameter k defined by r/R is in the range of 0.17 to 0.42.

Abstract: The present invention provides: an electrophotographic photosensitive member which reduces image defects due to ghosting not only under a normal temperature and normal humidity environment but also even under a low temperature and low humidity environment; and a novel phthalocyanine crystal. The electrophotographic photosensitive member of the present invention comprises a photosensitive layer which comprises a phthalocyanine crystal in which a N,N-dimethylformamide is contained. The content of the N,N-dimethylformamide is 0.1% by mass or more and 1.5% by mass or less based on the phthalocyanine crystal.

Abstract: An electrophotographic photosensitive member wherein a charge generating layer of the electrophotographic photosensitive member includes a gallium phthalocyanine crystal in which an organic compound is contained, wherein the organic compound is at least one compound selected from the group consisting of dimethylsulfoxide, N,N-dimethylformamide, N-methylformamide, N-propylformamide, N-vinylformamide and N-methylpyrrolidone, the content of the organic compound is 0.1% by mass or more and 2.0% by mass or less based on a gallium phthalocyanine in the gallium phthalocyanine crystal, and a charge transporting layer of the electrophotographic photosensitive member includes a polycarbonate resin having structural units represented by formulae (1) and (2).

Abstract: In order to provide an electrophotographic photosensitive member with which a ghost is suppressed even under a low temperature and low humidity environment, and a process cartridge and an electrophotographic apparatus having the electrophotographic photosensitive member, the electrophotographic photosensitive member has a support, an undercoat layer formed on the support, and a photosensitive layer formed on the undercoat layer and comprising a charge generating material and a hole transporting material, wherein the undercoat layer comprises a particular amine compound.

Abstract: An electrophotographic photosensitive member includes a support and a photosensitive layer on the support, and the photosensitive layer contains a hydroxygallium phthalocyanine crystal having peaks at Bragg angles 2?±0.2° of 6.9°, 7.7°, 16.4°, 24.4°, and 26.5° in CuK? X-ray diffraction.

Abstract: An electrophotographic photosensitive member, comprising a support, a charge generating layer on the support and a charge transporting layer on the charge generating layer, wherein the charge generating layer comprises a gallium phthalocyanine crystal, a nitrogen-containing heterocyclic compound and a compound represented by Formula (1), wherein a nitrogen atom in a heterocyclic ring of the nitrogen-containing heterocyclic compound has a substituent.

Abstract: Provided is an electrophotographic photosensitive member, a process cartridge and an electrophotographic apparatus each having the electrophotographic photosensitive member that can output an image having less image defects due to a ghost phenomenon not only under a normal-temperature, normal-humidity environment but also under a low-temperature, low-humidity environment as a particularly severe condition. The electrophotographic photosensitive member includes a support and a photosensitive layer formed on the support, in which the photosensitive layer includes a gallium phthalocyanine crystal containing a specific amine compound in itself.

Abstract: Provided is an electrophotographic photosensitive member, including a photosensitive layer that includes a phthalocyanine crystal in which a compound represented by the following formula (1) is contained: in the formula (1), X represents a vinyl group or a propyl group.

Abstract: An electrophotographic photoconductor comprises a support, an undercoat layer, a charge generation layer, and a hole transport layer in this order. The undercoat layer comprises an electron transport substance, and the charge generation layer comprises a gallium phthalocyanine crystal and an amide compound represented by formula (N1): where R1 represents a methyl group, a propyl group, or a vinyl group.

Abstract: An electrophotographic photosensitive member including a support, and a charge generating layer and a charge transporting layer on the support, wherein the charge generating layer includes a gallium phthalocyanine crystal in which an organic compound is contained, wherein the organic compound is at least one compound selected from the group consisting of dimethylsulfoxide, N,N-dimethylformamide, N-methylformamide, N-propylformamide, N-vinylformamide and N-methylpyrrolidone, the content of the organic compound is 0.1% by mass or more and 1.5% or less based on a gallium phthalocyanine in the gallium phthalocyanine crystal, and the charge transporting layer includes a polyester resin having a structural unit represented by formula (1).

Abstract: An electrophotographic photosensitive member includes a support and a photosensitive layer in this order. The photosensitive layer contains a chlorogallium phthalocyanine crystal obtained by mixing a hydroxygallium phthalocyanine crystal and an aqueous hydrochloric acid solution.

Abstract: An electrophotographic photosensitive member wherein a charge generating layer of the electrophotographic photosensitive member includes a gallium phthalocyanine crystal in which an organic compound is contained, wherein the organic compound is at least one compound selected from the group consisting of dimethylsulfoxide, N,N-dimethylformamide, N-methylformamide, N-propylformamide, N-vinylformamide and N-methylpyrrolidone, the content of the organic compound is 0.1% by mass or more and 2.0% by mass or less based on a gallium phthalocyanine in the gallium phthalocyanine crystal, and a charge transporting layer of the electrophotographic photosensitive member includes a polycarbonate resin having structural units represented by formulae (1) and (2).

Abstract: In an electrophotographic photosensitive member including a charge-generating layer, the charge-generating layer has a matrix-domain structure; in the matrix-domain structure, the domain contains a charge-generating substance, and the matrix contains a binder resin and a fluoranthene compound.

Abstract: A photosensitive layer of an electrophotographic photosensitive member contains a particular chlorogallium phthalocyanine crystal in which an organic compound is contained. The organic compound has a Hansen solubility parameter ?total of 24.0 or more and 35.0 or less, a polar energy ?P of 13.5 or more and 21.0 or less, and a dispersion energy ?D of 15.0 or more and 19.5 or less.

Abstract: The present invention can provide an electrophotographic photosensitive member that is capable of suppressing potential variation as much as possible to allow a high-quality image to be output, as well as a process cartridge and an electrophotographic apparatus including the electrophotographic photosensitive member. Therefore, the electrophotographic photosensitive member of the present invention is an electrophotographic photosensitive member comprising: a support; a charge-generating layer; and a charge-transporting layer on the charge-generating layer, in which the charge-generating layer comprises a gallium phthalocyanine crystal in which a polar solvent is contained, and the polar solvent is at least one selected from dimethylsulfoxide, N,N-dimethylformamide, N-methylformamide, N-propylformamide, N-vinylformamide and N-methylpyrrolidone relative to gallium phthalocyanine, and the content of the polar solvent is 0.1% by mass or more and 2.

Abstract: An electrophotographic photosensitive member can provide images in which black spots and fogging are suppressed and density unevenness due to coating unevenness of the charge generation layer is suppressed. The charge generation layer of the electrophotographic photosensitive member contains a gallium phthalocyanine crystal, a nitrogen-containing heterocyclic compound, and an amide compound represented by a formula (1), and a nitrogen atom in a heterocyclic ring of the nitrogen-containing heterocyclic compound has a substituent.