A compound is represented by general formula (1). In general formula (1), R.sup.1 and R.sup.2 each represent, independently of one another, a hydrogen atom, a methyl group, or an ethyl group, and a sum of the number of carbon atoms of the chemical group represented by R.sup.1 and the number of carbon atoms of the chemical group represented by R.sup.2 is 2. R.sup.3 and R.sup.4 each represent, independently of one another, a hydrogen atom, a methyl group, or an ethyl group, and a sum of the number of carbon atoms of the chemical group represented by R.sup.3 and the number of carbon atoms of the chemical group represented by R.sup.1 is 2. A photosensitive layer of an electrophotographic photosensitive member contains at least a charge generating material, a hole transport material, and a binder resin. The hole transport material includes a compound represented by general formula (1)

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An electrophotographic photosensitive member includes a conductive substrate and a photosensitive layer. The photosensitive layer is a single layer. The photosensitive layer contains a charge generating material, a hole transport material, an electron transport material, and a binder resin. The hole transport material includes a compound represented by chemical formula (1-1) or (1-2). The photosensitive layer further contains an n-type pigment. The n-type pigment is preferably an azo pigment or a perylene pigment.

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An electrophotographic photoreceptor, including a photosensitive layer formed on an electroconductive substrate. The photosensitive layer includes a charge-generating material and an electron-transporting material, and the electron-transporting material includes first and second electron-transporting materials. A difference in lowest unoccupied molecular orbital (LUMO) energy between the first electron-transporting material and the charge-generating material is in a range from 1.0 to 1.5 eV, and a difference in LUMO energy between the second electron-transporting material and the charge-generating material is in a range from 0.6 to 0.9 eV. A ratio of mass of the second electron-transporting material to a total of mass of the first electron-transporting material and the mass of the second electron-transporting material is in a range from 3 to 40%.

A single-layer photosensitive layer of an electrophotographic photosensitive member contains a charge generating material, a hole transport material, an electron transport material, and a binder resin. The charge generating material is a phthalocyanine pigment. A content percentage of the phthalocyanine pigment relative to the mass of the photosensitive layer is at least 0.70% by mass and no greater than 1.40% by mass. A film thickness of the photosensitive layer is at least 25 m and no greater than 32 m. A charge amount difference Q is no greater than 6.50 C.

An electrophotographic photosensitive member includes an undercoat layer, a charge generation layer, and a charge transport layer in this order. The undercoat layer contains a cured product of a composition containing an electron transport material, a particle having an average primary particle size of 10 nm or more, and a silicone oil. A content of the particle in the undercoat layer is 3% by mass or more and 20% by mass or less. A content of the silicone oil in the undercoat layer is 0.01% by mass or more and 10% by mass or less relative to the content of the particle.

An electrophotographic photosensitive member includes a conductive substrate and a photosensitive layer having a single-layer structure. The photosensitive layer contains a charge generating material, an electron transport material, a polycarbonate resin, and a hole transport material. The electron transport material includes a compound having a halogen atom and represented by general formula (1), (2), (3), (4), or (5). The polycarbonate resin has a terminal group having a fluoro group and represented by general formula (10). The hole transport material includes a compound represented by general formula (20), (21), (22), (23), (24), (25), (26), or (27). A charge of calcium carbonate as measured by charging the calcium carbonate through friction with the photosensitive layer is at least +6.5 C/g. The photosensitive layer has a Vickers hardness of at least 17.0 HV at 45 C. ##STR00001## ##STR00002## ##STR00003##

An electrophotographic photoreceptor includes a conductive substrate, an undercoat layer provided on the conductive substrate and containing a binder resin and an n-type organic pigment, and a photosensitive layer provided on the undercoat layer, in which an amount of an Fe element in the undercoat layer that is detected by high-frequency inductively coupled plasma emission spectrometric analysis is 80 ppm or less.

An electrophotographic photosensitive member includes, in sequence, a support, a conductive layer, an undercoat layer, a charge generation layer, and a charge transport layer. The conductive layer is a cured film, and the cured film contains titanium oxide particles doped with niobium. The undercoat layer contains a cured product of a composition that contains an electron transport material having a polymerizable functional group and a resin functionalized with a carboxylic acid derivative.

An electrophotographic photoreceptor includes a conductive substrate; a photosensitive layer provided on the conductive substrate; and an undercoating layer that is provided between the conductive substrate and the photosensitive layer and includes a charge transport material containing at least one of imide compounds represented by Formula (1) or (2):

##STR00001## (in Formulas (1) and (2), R.sup.10, R.sup.11, R.sup.20 or R.sup.21 independently represents a group represented by Formula (3) or (4) where X represents a monovalent organic group having at least one of an alkyl group, an alkylene group, an ether group, an ester group, and a keto group, a halogen atom, a nitro group, an aralkyl group, or an aryl group, Y represents a sulfur atom or an oxygen atom, n represents an integer of 0 to 2, and when n represents 2, two X's may be the same or different), and an imide compound is represented by Formula (1A) where Ar represents an aromatic group having 6 to 18 carbon atoms except for a tetravalent perylene group, X.sup.1 and X.sup.2 each independently represent a nitrogen atom or a substituted or unsubstituted carbon atom, Y.sup.1 and Y.sup.2 each independently represent an oxygen atom, a sulfur atom, a selenium atom, or NH, and R.sup.1 and R.sup.2 each independently represent a hydrogen atom or a monovalent organic group:

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The present invention provides an electrophotographic photoreceptor including a photosensitive layer containing an electron transport material, and having high pressure resistance and suppressed occurrence of a leak phenomenon, a method for producing the same, and an electrophotographic device using the same. The electrophotographic photoreceptor includes an electrically conductive support containing an aluminum alloy; an anodic oxide film formed on a surface of the electrically conductive support; and a photosensitive layer formed on the anodic oxide film. The photosensitive layer contains an electron transport material having an electron mobility of 10.sup.7 cm.sup.2/V/sec or more when field intensity is set to 20 V/m. The surface of the electrically conductive support having the anodic oxide film formed thereon has an admittance value that is 25 S or more and 60 S or less.