Abstract: A compound having a superior electron-transporting property useful for electrophotographic photoconductors and organic ELs, a positive charge type electrophotographic photoconductor for high sensitive copiers or printers and an electrophotographic apparatus using the same, by using the organic compound in a photosensitive layer as an electron-transporting material are provided. The present invention relates a quinone compound having a structure represented by Formula (I): (wherein R1, R2, R3, R4, R5, R6, R7 and R8 each denote hydrogen or an alkyl; R9 and R10 each denote hydrogen, an alkyl, aryl, or heterocyclic group; R11 and R12 each denote a halogen, an alkyl, alkoxy, alkyl halide, nitro, aryl, or heterocyclic group; n and m each denote an integer of 0 to 4; A denotes oxygen or SO2; and the substituent is a halogen, an alkyl, alkoxy, alkyl halide, nitro, aryl, or heterocyclic group), an electrophotographic photoconductor, and an electrophotographic apparatus using the same.

Abstract: Disclosed is a positive charging single-layer organic photoreceptor for liquid development which comprises a conductive substrate having thereon a photosensitive layer containing a charge generating material, an electron transport material and an organic binder resin comprising a polymer represented by formula (I): wherein R1 and R2 each represent a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl group, or R1 and R2 may form a cycloalkyl group in combination; R3, R4, R5, R6, R7, R8, R9, R10 and R11, each represent a hydrogen atom, a halogen atom, an aryl group or an alkyl group; and m and n each represent a molar percentage giving a total of 70 to 95 mol %.

Abstract: Disclosed is a positive charging single-layer organic photoreceptor for liquid development which comprises a conductive substrate having thereon a photosensitive layer containing a charge generating material, an electron transport material and an organic binder resin comprising a polymer represented by formula (I): 1

Abstract: The object of the present invention is to provide an endless flexible single-layer positively charged organic photosensitive body and an image forming device using the same, wherein: in an image forming device that is small, high speed and capable of color output, even when tension and compression forces, which are generated by having the photosensitive body stretched between a plurality of cylindrical rollers, are repeatedly applied to the belt photosensitive body, no problems arise in the electrophotography properties of the photosensitive layer.

Abstract: An electrophotographic photoconductor which is a positive charging, single layer type organic photoconductor including a conductive substrate; and a photosensitive layer which is provided on the conductive substrate, which is a positive charging, single layer type organic photoconductor, and which is composed of at least one charge generation substance that contains a phthalocyanine pigment; a positive hole transport substance; an electron transport substance; and a binder that contains a polycarbonate resin with a polydialkylsilozane constructed of a repeated unit represented by formula (1). Toner consumption during repeated electrophotographic use is reduced and print defects including dirty background suppressed.

Abstract: In a electrophotographic photoconductor having a single layer type photosensitive layer 3 laminated directly or through an undercoat layer 2 on an electroconductive substrate 1, the single layer type photosensitive layer 3 contains at least a resin binder, a charge generating substance, a hole transfer substance and an electron transfer substance, wherein the hole transfer substance is a compound represented by the general formula (HT1) shown below and an electrophotographic apparatus comprise this photoconductor. This electrophotographic photoconductor has good electric property in positive charge and good stability in repeated use.

Abstract: An organic electrophotographic photoconductor diminished in an image trouble due to history of a transfer process in a reversal development system is disclosed. The above organic electrophotographic photoconductor is called a separated-function laminated type organic electrophotographic photoconductor, which has an undercoat layer and a photosensitive layer laminated in this order on a conductive substrate, the photosensitive layer comprising a charge generation layer laminated on the undercoat layer and containing an organic compound, and a charge transport layer laminated on the charge generation layer and containing an organic compound. For the charge generation layer, a titanyloxyphthalocyanine compound is used as a charge generation material. The present invention uses the titanyloxyphthalocyanine compound having a clear diffraction peak at a Bragg angle (2.theta.) of 9.6.degree..+-.0.2.degree. or 27.3.degree..+-.0.2.degree. for CuK.alpha. characteristic X-ray (wavelength 1.541 .ANG.).