摘要:
Electrophotographic light-sensitive elements containing substituted or unsubstituted fluorenone hydrazones as charge generating or charge transport materials are described.
摘要:
An electrophotographic light-sensitive element comprising a conductive support which supports a light-sensitive layer containing a carbazole derivative of the formula: ##STR1## wherein R.sub.1 is an aryl group, R.sub.2 is hydrogen, a halogen, an alkyl, an alkoxy, an amino or hydroxy group, and R.sub.3 is an aryl, or a heterocyclic group.
摘要:
An electrophotographic photosensitive element having a conductive support provided thereon with a photosensitive layer comprising (i) a carrier-generating phase layer containing a carrier-generating material selected from the group consisting of perylene dyes, polycyclic quinones and azo dyes and (ii) a carrier-transporting phase layer containing a carrier-transporting material wherein said carrier-transporting phase comprises a hydrazone compound represented by the formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each represent an aryl group which may have a substituent or substituents, and Ar represents an arylene group which may have a substituent or substituents.
摘要:
An electrophotographic photosensitive element having a conductive support provided thereon with a photosensitive layer comprising a carrier-generating phase and a carrier-transporting phase. The carrier-transporting phase comprises a hydrazone compound to improve carrier-transporting ability having the formula ##STR1## wherein, X and Y each represent a hydrogen or a halogen, R.sub.1 and R.sub.2 each represent an aryl group which may have a substituent or substituents, and Ar represents an arylene group which may have a substituent or substituents.
摘要:
There is disclosed an electrophotographic photosensitive member comprising a photosensitive layer comprising a combination of a carrier generating layer and a carrier transporting layer provided on an electroconductive support, the carrier generating layer containing a bisazo compound and the carrier transporting layer containing a styryl compound and/or an amine derivative, a hydrazone compound or a carbazole derivative.The electrophotographic photosensitive member according to the present invention has a high sensitivity and can form constantly good visible images.
摘要:
A highly sensitive photoreceptor for electrophotography that forms a sharp image during repeated use is disclosed. It comprises an electrically conductive support having successively formed thereon a photoconductive photosensitive layer and a protective layer for that photosensitive layer, said photosensitive layer comprising an organic photoconductive material and said protective layer comprising an amorphous silicon carbide or amorphous silicon nitride containing a hydrogen atom and/or a fluorine atom. A method of forming a latent electrostatic image and an electrophotographic process using such photoreceptor are also disclosed.
摘要:
A photoreceptor for positive charging is disclosed, said photoreceptor comprising a carrier generating material which is stable against both heat and light, has high carrier generating efficiency and provides good photoconductivity over a wide wavelength range and a specific carrier transport material combined in such a manner that the shape of surface potential curves remains essentially constant over a cyclic operation and contributes to the formation of a visible image of high quality in each cycle by reducing the "memory effect", minimizing the residual potential and extending the cycle life.
摘要:
An electrophotographic element having a carrier generating layer and a carrier transport layer, which carrier transport layer contains an arylamine derivative and an amine substituted styryl compound, is disclosed.
摘要:
Disclosed is a light-sensitive member for electrophotography, having a charge generating phase formed by coating a dispersion comprising a charge generating substance, which contains in said charge generating phase an amine in an amount of 20-fold moles or less per mole of said charge generating substance and the solvent. Also disclosed are useful methods for the preparation of such a light-sensitive member.
摘要:
Disclosed is a photosensitive element for electrophotography comprised of a layered structure having a polycyclic quinone pigment dispersed in an organic resin binder as a charge generating layer and an organic charge transport layer mixed with a resin binder.