Abstract: This invention relates to an organophotoreceptor that includes:

Abstract: An organophotoreceptor that includes:

Abstract: An organophotoreceptor that includes:

Abstract: An electrophotographic photoreceptor including an electroconductive substrate and a photoreceptive layer, which is formed overlying the substrate, wherein the photoreceptive layer includes a charge carrier generation layer including a charge carrier generation material and a charge carrier transport layer including a charge carrier transport material, and wherein when an electric field of from 2.5×105 V/cm to 5.5×105 V/cm is applied to the charge carrier transport layer, the relationship, tCTL/&mgr;CTL≦1.5×103 V·s/m, is satisfied, wherein tCTL represents a thickness of the charge carrier transport layer and &mgr;CTL represents a charge mobility of the charge carrier transport layer.

Abstract: The present invention relates to a stilbeneamine derivative represented by a formula (1): 1

Abstract: An electrophotographic photoreceptor is disclosed. The photoreceptor has a difference in ionization potential between the photosensitive layer and the hardenable resinous layer of not more than 0.4 eV, and a response time T10 defined in the specification is not more than 0.25 second. An image forming method and apparatus employing the photoreceptor are also disclosed.

Abstract: The present invention relates to a novel class of thermostable hole-injection and hole-transport compounds having tunable glass transition temperatures and ionization potentials for use in organic light emitting diode (“OLED”) devices. In particular, the compounds of the present invention comprise a trityl aniline core structure with various substituents attached to the nitrogen group, the structures of which allow for the adjustment of the glass transition temperatures and ionization potentials of the compounds. The present invention also relates to microdisplay devices comprising the compounds of the present invention in the hole-injection/hole-transport layers.

Abstract: The present invention relates to an electrophotosensitive material comprising a conductive substrate and a photosensitive layer formed on the substrate, the photosensitive layer containing a quinone derivative represented by the general formula (1), (2) or (3): wherein A represents an oxygen atom or a sulfur atom; R1 to R14 are the same or different and each represents an alkyl group or an aryl group; and m and n represent an integer of 0 to 4. The electrophotosensitive material has high sensitivity.

Abstract: An electrophotographic photoreceptor is disclosed. The photoreceptor has a difference in ionization potential between the photosensitive layer and the hardenable resinous layer of not more than 0.4 eV, and a response time T10 defined in the specification is not more than 0.25 second. An image forming method and apparatus employing the photoreceptor are also disclosed.

Abstract: An object of the invention is to obtain an electrophotographic photoreceptor having high sensitivity, high image quality, high stability and high resolution. A charge generating layer of the electrophotographic photoreceptor contains, as a charge generating substance, a crystalline titanyl phthalocyanine composition exhibiting, in an X-ray diffraction spectrum of a CuK&agr; characteristic X-ray (wavelength: 1.5418 Å), at least four diffraction peaks at Bragg angles (2&thgr;±0.2°) of 10.0° or lower, and a diffraction peak at a Bragg angle of 27.2° having an intensity smaller than the maximum diffraction intensity of the four diffraction peaks, or a lowly crystalline titanyl phthalocyanine composition exhibiting a diffraction peak having the maximum diffraction intensity at a Bragg angle (2&thgr;±0.2°) of 27.3°. A charge transporting layer of the electrophotographic photoreceptor contains, as a charge transporting substance, a bisamine compound.

Abstract: The present invention provides an electrophotosensitive material comprising a conductive substrate and a photosensitive layer provided on the conductive substrate, the photosensitive layer comprising a specific hole transferring material and/or electron transferring material and a binding resin of a polyester resin which is a substantially linear polymer obtained by using a specific dihydroxy compound represented by the general formula (1): wherein R1 is an alkylene group having 2 to 4 carbon atoms; and R2, R3, R4 and R5 are the same or different and indicate a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an aryl group or an aralkyl group or the like. This photosensitive material is improved in sensitivity, and is also superior in adhesion to conductive substrate as well as mechanical strength such as wear resistance, etc.