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EP0376311B1 - Elément photosensible pour électrophotographie - Google Patents

Elément photosensible pour électrophotographie Download PDF

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Publication number
EP0376311B1
EP0376311B1 EP89124079A EP89124079A EP0376311B1 EP 0376311 B1 EP0376311 B1 EP 0376311B1 EP 89124079 A EP89124079 A EP 89124079A EP 89124079 A EP89124079 A EP 89124079A EP 0376311 B1 EP0376311 B1 EP 0376311B1
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EP
European Patent Office
Prior art keywords
charge
layer
member according
substituent
charge transport
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP89124079A
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German (de)
English (en)
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EP0376311A3 (en
EP0376311A2 (fr
Inventor
Toshihiro Kikuchi
Tetsuro Kanemaru
Akihiro Senoo
Ryoji Yashiro
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Canon Inc
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Canon Inc
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Filing date
Publication date
Priority claimed from JP33099588A external-priority patent/JPH02178667A/ja
Priority claimed from JP63330987A external-priority patent/JPH02178666A/ja
Application filed by Canon Inc filed Critical Canon Inc
Publication of EP0376311A2 publication Critical patent/EP0376311A2/fr
Publication of EP0376311A3 publication Critical patent/EP0376311A3/en
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Publication of EP0376311B1 publication Critical patent/EP0376311B1/fr
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G5/00—Recording members for original recording by exposure, e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor
    • G03G5/02—Charge-receiving layers
    • G03G5/04—Photoconductive layers; Charge-generation layers or charge-transporting layers; Additives therefor; Binders therefor
    • G03G5/06—Photoconductive layers; Charge-generation layers or charge-transporting layers; Additives therefor; Binders therefor characterised by the photoconductive material being organic
    • G03G5/0622—Heterocyclic compounds
    • G03G5/0624—Heterocyclic compounds containing one hetero ring
    • G03G5/0635—Heterocyclic compounds containing one hetero ring being six-membered
    • G03G5/0637—Heterocyclic compounds containing one hetero ring being six-membered containing one hetero atom
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G5/00—Recording members for original recording by exposure, e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor
    • G03G5/02—Charge-receiving layers
    • G03G5/04—Photoconductive layers; Charge-generation layers or charge-transporting layers; Additives therefor; Binders therefor
    • G03G5/06—Photoconductive layers; Charge-generation layers or charge-transporting layers; Additives therefor; Binders therefor characterised by the photoconductive material being organic
    • G03G5/0601—Acyclic or carbocyclic compounds
    • G03G5/0612—Acyclic or carbocyclic compounds containing nitrogen
    • G03G5/0614—Amines
    • G03G5/06142—Amines arylamine
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G5/00—Recording members for original recording by exposure, e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor
    • G03G5/02—Charge-receiving layers
    • G03G5/04—Photoconductive layers; Charge-generation layers or charge-transporting layers; Additives therefor; Binders therefor
    • G03G5/06—Photoconductive layers; Charge-generation layers or charge-transporting layers; Additives therefor; Binders therefor characterised by the photoconductive material being organic
    • G03G5/0622—Heterocyclic compounds
    • G03G5/0624—Heterocyclic compounds containing one hetero ring
    • G03G5/0627—Heterocyclic compounds containing one hetero ring being five-membered
    • G03G5/0629—Heterocyclic compounds containing one hetero ring being five-membered containing one hetero atom

Definitions

  • the present invention relates to a photosensitive member for electrophotography, particularly to a photosensitive member for electrophotography comprising a low-molecular weight organic photoconductor capable of providing improved electrophotographic characteristics.
  • organic photoconductive polymers to be used for electrophotographic photosensitive members, such as polyvinyl carbazole.
  • These conventional organic polymers are superior to inorganic photoconductive materials in lightness (in weight), film-forming property, etc., but are inferior to the latter in sensitivity, durability, stability to environmental change, mechanical strength, etc.
  • the conventional low-molecular weight organic photoconductors represented by those as described above are used, the above-mentioned defect in film-forming property, which has conventionally posed a problem in the field of the organic photoconductive polymer, may be obviated by appropriately selecting a binder to be used in combination therewith.
  • these conventional organic photoconductors cannot provide a sufficient sensitivity.
  • the electrophotographic photosensitive member comprising such a photosensitive layer may be improved in sensitivity to visible light, charge retentivity, surface strength, etc.
  • organic compounds As the charge-transporting substance constituting the above-mentioned charge transport layer, a large number of organic compounds have heretofore been proposed. Examples thereof include: pyrazoline compounds (Japanese Laid-Open Patent Application No. 72231/1977), hydrazone compounds (U.S. Patent 842,431 and Japanese Laid-Open Patent Application No. 52063/1980), triphenylamine compounds (Japanese Laid-Open Patent Application Nos. 195254/1982 and 58445/1979), stilbene compounds (Japanese Laid-Open Patent Application Nos. 151955/1979 and 198043/1983), carbazole compounds (Japanese Laid-Open Patent Application Nos. 150128/1979 and 58451/1988), benzothiophene compounds (Japanese Laid-Open Patent Application No. 110835/1979), etc.
  • pyrazoline compounds Japanese Laid-Open Patent Application No. 72231/1977
  • hydrazone compounds U.S. Patent
  • the EP-A-0 161 934 discloses an electrophotographic photosensitive member, the charge transporting layer of which contains a charge transporting aromatic amine compound represented by the general formula: wherein R1 and R2 are an aromatic group selected from the group consisting of a substituted or unsubstituted phenyl group, naphthyl group and polyphenyl group and R3 is selected from the group consisting of a substituted or unsubstituted aryl group, alkyl group having from 1 to 18 carbon atoms and cycloaliphatic compounds having from 3 to 18 carbon atoms.
  • R1 and R2 are an aromatic group selected from the group consisting of a substituted or unsubstituted phenyl group, naphthyl group and polyphenyl group
  • R3 is selected from the group consisting of a substituted or unsubstituted aryl group, alkyl group having from 1 to 18 carbon atoms and cycloaliphatic compounds having from 3 to 18 carbon atoms.
  • the sensitivity and other electrophotographic characteristics are not necessarily sufficient, and the light part potential and dark part potential are liable to show a considerable change, when charging and exposure operations are conducted repetitively.
  • An object of the present invention is to provide an electrophotographic photosensitive member which has solved the above-mentioned various problems encountered in the conventional photosensitive member.
  • Another object of the present invention is to provide an electrophotographic photosensitive member using a novel organic photoconductor which may easily be produced, is relatively inexpensive and is excellent in durability.
  • a photosensitive member for electrophotography comprising an electroconductive substrate and a photosensitive layer disposed thereon, wherein the photosensitive layer comprises a triarylamine compound represented by the following general formula (I) or (II): wherein Ar1 and Ar2 respectively denote a biphenyl group capable of having a substituent; Ar3 denotes a phenyl group capable of having a substituent or an aromatic heterocyclic group capable of having a substituent; Ar4 and Ar5 respectively denote a benzene ring capable of having a substituent or aromatic fused-ring hydrocarbon group capable of having a substituent; R1 and R2 respectively denote a hydrogen atom, alkyl, alkoxyl or halogen atom; and at least one of Ar4 and Ar5 is an aromatic fused-ring hydrocarbon group.
  • Ar1 and Ar2 respectively denote a biphenyl group capable of having a substituent
  • Ar3 denotes a phenyl group capable of having a substituent or an aromatic heterocycl
  • Ar3 of formula (I) is specified to denote only an aromatic hetero cyclic group capable of having a substituent in view of the earlier national right DE-A-38 35 791.
  • Figures 1 and 2 show infrared absorption spectra of Compound Example Nos. 2 and 26, respectively, according to the KBr tablet method.
  • Ar1 and Ar2 respectively denote a biphenyl group capable of having a substituent.
  • a substituent may include alkyl groups such as methyl, ethyl and propyl; alkoxy groups such as methoxy, ethoxy and propoxy; halogen atoms such as fluorine, chlorine and bromine; etc.
  • Ar1 may be the as or different from Ar2.
  • Ar3 denotes a phenyl group capable of having a substituent, or an aromatic heterocyclic group such as pyridyl, quinolyl, thienyl or furyl capable of having a substituent.
  • a substituent may include: alkyl groups such as methyl, ethyl and propyl; alkoxy groups such as methoxy, ethoxy and propoxy; aryloxy groups such as phenoxy and naphthoxy; aromatic groups such as phenyl and naphthyl; halogen atoms such as fluorine, chlorine and bromine; etc.
  • Ar4 and Ar5 respectively denote a benzene ring or aromatic condensed-ring (or fused-ring) hydrocarbon group capable of having a substituent. At least one of Ar4 and Ar5 an aromatic condensed ring hydrocarbon group. Specific examples of such an aromatic condensed ring hydrocarbon may include naphthalene, anthracene, phenanthrene, chrysene and naphthacene. Specific examples of such a substituent which Ar4 and Ar5 may have include: alkyl groups such as methyl, ethyl and propyl; alkoxy groups such as methoxy, ethoxy and propoxy; halogen atoms such as fluorine, chlorine and bromine; etc. Ar4 may be the as or different from Ar5.
  • R1 and R2 respectively denote a hydrogen atom; an alkyl group such as methyl, ethyl and propyl; an alkoxy group such as methoxy, ethoxy and propoxy; a halogen atom such as fluorine, chlorine and bromine; etc.
  • R1 may be the as or different from R2.
  • Figure 1 shows an infrared absorption spectrum chart obtained by measuring the thus obtained compound by a KBr tablet (or pellet) method.
  • Figure 2 shows an infrared absorption spectrum chart obtained by measuring the thus obtained compound by a KBr tablet (or pellet) method.
  • the compound according to the present invention may easily be synthesized inexpensively.
  • the other compounds according to the present invention may be synthesized in a similar manner as described in the above-mentioned Synthesis Examples.
  • the photosensitive layer is function-separated into a charge generation layer and a charge transport layer
  • the charge transport layer comprises the compound represented by the above-mentioned general formula (I) or (II) as a charge-transporting substance.
  • the charge transport layer according to the present invention may preferably be formed by dissolving the above-mentioned compound of the formula (I) or (II) in an appropriate solvent together with a binder, applying the resultant coating liquid such as solution onto a predetermined surface, and drying the resultant coating.
  • binder to be used for forming the charge transport layer may include; polyarylate resins, polysulfone resins, polyamide resins, acrylic resins, acrylonitrile resins, methacrylic resins, vinyl chloride resins, vinyl acetate resins, phenol resins, epoxy resins, polyester resins, alkyd resins, polycarbonate, polyurethane, or copolymer resins containing two or more of the recurring units of these resins, such as styrene-butadiene copolymers, styrene-acrylonitrile copolymers, styrene-maleic acid copolymers, etc.
  • organic photoconductive polymers such as polyvinylcarbazole, polyvinylanthracene and polyvinylpyrene may be used.
  • the charge-transporting substance may preferably be used in an amount of 10 - 500 wt. parts, more preferably 50 - 200 wt. parts, per 100 wt. parts of the binder.
  • the charge transport layer is electrically connected to the charge generation layer as described hereinafter, and has a function of receiving charge carriers injected from the charge generation layer in the presence of an electric field and of transporting these charge carriers to the surface of the charge transport layer.
  • the charge transport layer may be disposed on the charge generation layer, or may be disposed under the charge generation layer.
  • the charge transport layer may preferably be disposed on the charge generation layer. It is not preferred that the charge transport layer has too large a thickness, since there is a certain limit to the thickness thereof suitable for the transport of the charge carriers.
  • the charge transport layer may preferably have a thickness of 5 - 40 microns, more preferably 10 - 30 microns.
  • the organic solvent to be used in the above-mentioned formation of the charge transport layer may vary depending on the kind of the binder used therefor, and may preferably be selected from those which do not substantially dissolve the charge generation layer or a primer (or undercoat layer) as described hereinafter.
  • organic solvent may include: alcohols such as methanol, ethanol, and isopropanol; ketones such as acetone, methyl ethyl ketone, and cyclohexanone; amides such as N,N-dimethylformamide and N,N-dimethylacetamide; sulfoxides such as dimethyl sulfoxide; ethers such as tetrahydrofuran, dioxane, and ethylene glycol monomethyl ether; esters such as methyl acetate and ethyl acetate; aliphatic halogenated hydrocarbons such as chloroform, methylene chloride, dichloroethylene, carbon tetrachloride, and trichloroethylene; aromatic compounds such as benzene, toluene, xylene, monochlorobenzene, and dichlorobenzene; etc.
  • alcohols such as methanol, ethanol, and isopropanol
  • ketones such as acetone
  • the coating may be effected by various coating methods such as dip coating, spray coating, wire bar coating, and blade coating.
  • the drying should preferably be conducted in the sequence of drying at room temperature to a "tack-free" state and then heat drying. In general, the heat drying may preferably be conducted for a time in the range of 5 minutes to 2 hours at a temperature of 30 °C to 200 °C under quiescent condition or under blowing.
  • the charge transport layer according to the present invention can further contain an additive selected from various species thereof.
  • an additive may include: plasticizers such as diphenyl, m-terphenyl and dibutyl phthalates; surface-lubricating agents such as silicone oil, graft-type silicone polymers, and various fluorocarbons; potential stabilizing agents such as dicyanovinyl compounds and carbazole derivatives; anti-oxidizing agents such as ⁇ -carotene, Ni complexes, and 1,4-diazabicyclo[2,2,2]-octane; etc.
  • the charge generation layer may comprise a charge-generating substance.
  • the charge-generating substance may include: inorganic charge-generating substances such as selenium, selenium-tellurium, and amorphous silicon; and organic charge-generating substances including: cationic dyes such as pyrylium dye, thiapyrylium dye, azulenium dye, thiacyanine dye, and quinocyanine dye; polycyclic quinone pigments such as squarium salt dye, phthalocyanine pigment, anthanthrone pigment, dibenzpyrene-quinone pigment, and pyranthrone pigment; indigo pigment; quinacridone pigment; azo pigment; etc.
  • These charge-generating substances may be used singly or as a combination of two or more species.
  • the charge generation layer may be formed by using such a charge-generating substance in the form of a vapor deposition layer or coating layer.
  • the azo pigment particularly includes various types. Representative structures of the azo pigment preferably used in the present invention are described hereinbelow.
  • coupler portion Cp include those having the following structures:
  • the above-mentioned central skeleton A and coupler Cp may appropriately be combined to form a pigment as a charge-generating substance.
  • the charge generation layer may be formed by vapor-depositing such a charge-generating substance by means of a vacuum vapor deposition device, or by applying a dispersion containing such a charge-generating substance dispersed therein, together with an appropriate binder as desired.
  • the binder to be used for forming the charge generation layer may be selected from a wide variety of insulating resins or alternatively from organic photoconductive polymers such as poly-N-vinylcarbazole, polyvinylanthracene, and polyvinylpyrene.
  • the insulating resin such as polyvinyl butyral, polyarylates (e.g., polycondensation product between bisphenol A and phthalic acid), polycarbonate, polyester, phenoxy resin, acrylic resin, polyacrylamide resin, polyamide, polyvinyl pyridine, cellulose resin, urethane resin, epoxy resin, casein, polyvinyl alcohol, and polyvinyl pyrrolidone.
  • the resin may preferably be contained in the charge generation layer in an amount of 5 - 80 wt. %, more preferably 10 - 40 wt. %.
  • organic solvent usable in the coating of the charge generation layer may include: alcohols such as methanol, ethanol, and isopropanol; ketones such as acetone, methyl ethyl ketone, and cyclohexanone; amides such as N,N-dimethylformamide and N,N-dimethylacetamide; sulfoxides such as dimethyl sulfoxide; ethers such as tetrahydrofuran, dioxane, and ethylene glycol monomethyl ether; esters such as methyl acetate and ethyl acetate; aliphatic halogenated hydrocarbons such as chloroform, methylene chloride, dichloroethylene, carbon tetrachloride, and trichloroethylene; aromatic compounds such as benzene, toluene, xylene, monochlorobenzene, and dichlorobenzene; etc.
  • alcohols such as methanol, ethanol, and isopropano
  • the charge generation layer may preferably contain the above-mentioned charge-generating substance in an amount as large as possible, so that it may provide a sufficient absorbance. Further, the charge generation layer may preferably be a thin layer having a thickness of 5 microns or below, more preferably 0.01 - 1 micron so that it may inject charge carriers generated therein into the charge transport layer within the lifetime of the charge carriers. This may be attributable to facts such that most of the incident light quantity may preferably be absorbed into the charge generation layer to generate a large number of charge carriers, and that the thus generated charge carriers may preferably be injected into the charge transport layer without deactivation due to recombination or trapping thereof.
  • the above-mentioned photosensitive layer having a laminate structure comprising a charge generation layer and a charge transport layer may be disposed on an electroconductive substrate.
  • the electroconductive substrate may be a substrate which per se has an electroconductivity such as those of aluminum, aluminum alloy, copper, zinc, and stainless steel; alternatively, the above-mentioned metal substrate or a substrate of a plastic coated with, e.g., a vacuum vapor-deposited layer of aluminum, aluminum alloy, indium oxide, tin oxide or indium oxide-tin oxide alloy, or a mixture of an electroconductive powder (such as aluminum powder, titanium oxide, tin oxide, zinc oxide, carbon black and silver particles) and an appropriate binder; a substrate of paper or plastic impregnated with electroconductive particles, or a plastic substrate coated with an electroconductive polymer layer.
  • the electroconductive substrate may be in any form such as sheet, drum, etc.
  • the primer layer may comprise, e.g., casein, polyvinyl alcohol, nitrocellulose, ethylene-acrylic acid copolymer, polyamide (e.g., nylon 6, nylon 66, nylon 610, copolymer nylon, alkoxymethylated nylon, etc.), polyurethane, gelatin, or aluminum oxide.
  • the thickness of the primer layer should preferably be 0.1 - 5 microns, particularly 0.5 to 3 microns.
  • a protective layer can further be disposed on the photosensitive layer.
  • a protective layer may comprise a resin, or a resin and an electroconductive material dispersed therein.
  • a pigment or dye having a photoconductivity may be used as a sensitizer.
  • a dye or pigment include: the above-mentioned disazo pigment, pyrylium dye, thiapyrylium dye, selenapyrylium dye, benzopyrylium dye, benzothiapyrylium dye, naphthopyrylium dye, and naphthothiapyrylium dye, as described in U.S. Patent 3,554,745; 3,567,438; and 3,586,500.
  • an eutectic (crystal) complex comprising a pyrylium dye (as disclosed in U.S. Patent 3,684,502) and an electrically insulating polymer comprising an alkylidene-diarylene portion may be used as a sensitizer.
  • Such an eutectic complex may be formed by dissolving 4-[4-bis(2-chloroethyl)aminophenyl]-2,6-diphenylthiapyrylium perchlorate and poly(4,4′-isopropylidene diphenylene carbonate) in a halogenated hydrocarbon-type solvent (e.g., dichloromethane, chloroform, carbon tetrachloride, 1,1-dichloroethane, 1,2-dichloroethane, 1,1,2-trichloroethane, chlorobenzene, bromobenzene, 1,2-dichlorobenzene, etc.), and then adding a non-polar solvent (e.g., hexane, octane, decane, 2,2,4-trimethylbenzene, ligroin, etc.) to the resultant mixture so as to produce a particulate eutectic complex.
  • the electrophotographic photosensitive member may include a binder such as styrene-butadiene copolymer, silicone resin, vinyl resin, vinylidene chloride-acrylonitrile copolymer, styrene-acrylonitrile copolymer, vinyl acetate-vinyl chloride copolymer, polyvinyl butyral, polymethyl methacrylate, poly-N-butyl methacrylate, polyester, cellulose ester, etc.
  • a binder such as styrene-butadiene copolymer, silicone resin, vinyl resin, vinylidene chloride-acrylonitrile copolymer, styrene-acrylonitrile copolymer, vinyl acetate-vinyl chloride copolymer, polyvinyl butyral, polymethyl methacrylate, poly-N-butyl methacrylate, polyester, cellulose ester, etc.
  • the electrophotographic photosensitive member according to the present invention may be used not only for ordinary copying machines but also in the fields related to electrophotography such as laser printers, CRT printers and electrophotographic plate-making.
  • a disazo pigment represented by the following formula: and a solution obtained by dissolving 2 g of a butyral resin (butyral degree: 63 mol. %) in 100 ml of cyclohexanone were dispersed for 24 hours by means of a sand mill to prepare a coating liquid.
  • the thus prepared coating liquid was applied onto an aluminum sheet by means of a wire bar to form a charge generation layer having a thickness (after drying) of 0.2 micron.
  • the thus prepared photosensitive member was charged by using corona (-5 KV) according to a static method by means of an electrostatic copying paper tester (Model: SP-428, mfd. by Kawaguchi Denki K.K.) and retained in a dark place for 1 sec. Thereafter, the photosensitive member was exposed to light at an illuminance of 20 lux, to evaluate the charging characteristic.
  • the surface potential (V0), the potential (V1) obtained after a dark decay of 1 sec, and the exposure quantity (E 1/2 ) required for decreasing the potential V1 to 1/2 thereof were measured.
  • the photosensitive member prepared in this instance was bonded to the cylinder for a photosensitive drum to be used for a plain paper copying (PPC) machine (NP-3525, mfd. by Canon K.K.) and subjected to a copying test of 5000 sheets.
  • PPC plain paper copying
  • V L light part potential
  • V D dark part potential
  • An electrophotographic photosensitive member was prepared in the same manner as in Example 1 except that Compound Example (29) was used as the charge-transporting substance instead of the Compound Example (6) used in Example 1.
  • the compound according to the present invention provided photosensitive member providing a better sensitivity and better potential stability in successive copying, as compared with those of Comparative Examples.
  • a charge-generating substance represented by the following formula: a butyral resin (butyral degree: 63 mol. %) and 200 g of dioxane were dispersed for 48 hours by means of a ball mill disperser to prepare a dispersion.
  • the thus prepared dispersion was applied onto the above-mentioned primer layer by a blade coating method to form a charge generation layer having a thickness (after drying) of 0.15 micron.
  • the thus prepared photosensitive member was charged by using corona discharge (-5 KV) so as to have an initial potential of V0, left standing in a dark place for 1 sec, and thereafter the surface potential thereof (V1) was measured.
  • the exposure quantity (E 1/2 , »J/cm2) required for decreasing the potential V1 after the dark decay to 1/2 thereof was measured.
  • the light source used herein was laser light (output: 5 mW, emission wavelength: 780 nm) emitted from a ternary semiconductor comprising gallium/aluminum/arsenic.
  • Each of the above-mentioned photosensitive member was assembled in a laser beam printer (trade name: LBP-CX, mfd. by Canon K.K.) as an electrophotographic printer equipped with the above-mentioned semiconductor laser using a reversal development system, and subjected to actual image formation.
  • a laser beam printer (trade name: LBP-CX, mfd. by Canon K.K.) as an electrophotographic printer equipped with the above-mentioned semiconductor laser using a reversal development system, and subjected to actual image formation.
  • image formation conditions used herein were as follows: surface potential after primary charging: -700 V surface potential after image exposure: -150 V (exposure quantity: 2.0 »J/cm2) transfer potential: +700 V polarity of developer: negative process speed: 50 mm/sec developing condition (developing bias): -450 V image exposure scanning system: image scan exposure prior to the primary charging: 50 lux.sec (whole surface exposure using red light)
  • the image formation was effected by line-scanning the laser beam corresponding to character and image signals. As a result, good prints were obtained with respect to the characters and images, when each of the above-mentioned two photosensitive members was used.
  • the thus obtained photosensitive member was evaluated in the same manner as in Example 18.
  • aqueous ammonia solution of casein (comprising 11.2 g of casein, 1 g of 28 % ammonia water, and 222 ml of water) was applied onto an aluminum plate by means of a wire bar to form a primer layer having a thickness of 1 micron (after drying).
  • a charge transport layer and a charge generation layer were successively formed in the same manner as in Example 4, whereby an electrophotographic photosensitive member was prepared in the same manner as in Example 1 except that the laminate structure was different (Example 24).
  • the charging characteristics of the thus obtained photosensitive member were evaluated in the same manner as in Example 1 except that the charging polarity was positive.
  • a 5 % methanol solution of a soluble nylon (6-66-610-12 quaternary copolymer nylon) was applied onto an aluminum substrate to form a primer layer having a thickness of 0.5 micron (after drying).

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Photoreceptors In Electrophotography (AREA)

Claims (11)

  1. Elément photosensible pour l'électrophotographie, comprenant un substrat électroconducteur et une couche photosensible disposée sur ce substrat, la couche photosensible comprenant un composé du type d'une triarylamine représenté par la formule générale (I) ou (II) suivante :
    Figure imgb0111
    Figure imgb0112
     dans laquelle Ar₁ et Ar₂ désignent respectivement un groupe biphényle capable de porter un substituant ; Ar₃ désigne un groupe phényle capable de porter un substituant ou un groupe hétérocyclique aromatique capable de porter un substituant ; Ar₄ et Ar₅ désignent respectivement un noyau benzénique capable de porter un substituant, ou un groupe hydrocarboné aromatique à noyaux condensés capable de porter un substituant ; R₁ et R2 désignent respectivement un atome d'hydrogène, un groupe alkyle, alkoxyle ou un atome d'halogène ; et l'un au moins de Ar₄ et Ar₅ est un groupe hydrocarboné aromatique à noyaux condensés.
  2. Elément suivant la revendication 1, dans lequel la couche photosensible a une structure stratifiée comprenant une couche génératrice de charges et une couche de transport de charges.
  3. Elément suivant la revendication 2, qui comprend le substrat électroconducteur sur lequel se trouvent, dans l'ordre, la couche génératrice de charges et la couche de transport de charges.
  4. Elément suivant la revendication 2, qui comprend le substrat électroconducteur sur lequel se trouvent, dans l'ordre, la couche de transport de charges et la couche génératrice de charges.
  5. Elément suivant la revendication 2, dans lequel la couche de transport de charges comprend le composé représenté par la formule (I) ou (II) et un polymère isolant ou un polymère organique photoconducteur.
  6. Elément suivant la revendication 2, dans lequel la couche de transport de charges comprend le composé représenté par la formule (I) ou (II), un polymère isolant ou un polymère organique photoconducteur, et au moins une substance choisie dans le groupe comprenant un plastifiant, un agent lubrifiant de surface, un agent de stabilisation de potentiel et un agent antioxydant.
  7. Elément suivant la revendication 2, dans lequel la couche génératrice de charges comprend une substance organique engendrant des charges et une résine isolante.
  8. Elément suivant la revendication 1, qui comprend en outre une première couche disposée entre le substrat électroconducteur et la couche photosensible.
  9. Elément suivant la revendication 1, qui comprend en outre une couche protectrice disposée sur la couche photosensible.
  10. Elément suivant les revendications 1 à 9, dans lequel le composé du type d'une triarylamine est représenté par la formule (I).
  11. Elément suivant les revendications 1 à 9, dans lequel le composé du type d'une triarylamine est représenté par la formule (II).
EP89124079A 1988-12-29 1989-12-28 Elément photosensible pour électrophotographie Expired - Lifetime EP0376311B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP33099588A JPH02178667A (ja) 1988-12-29 1988-12-29 電子写真感光体
JP330995/88 1988-12-29
JP63330987A JPH02178666A (ja) 1988-12-29 1988-12-29 電子写真感光体
JP330987/88 1988-12-29

Publications (3)

Publication Number Publication Date
EP0376311A2 EP0376311A2 (fr) 1990-07-04
EP0376311A3 EP0376311A3 (en) 1990-09-05
EP0376311B1 true EP0376311B1 (fr) 1995-04-05

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EP89124079A Expired - Lifetime EP0376311B1 (fr) 1988-12-29 1989-12-28 Elément photosensible pour électrophotographie

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EP (1) EP0376311B1 (fr)
AU (1) AU604429B2 (fr)
CA (1) CA2006861C (fr)
DE (1) DE68922083T2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10032568B2 (en) 2014-04-09 2018-07-24 National Chung Hsing University Photosensitive organic dyes for dye-sensitized solar cells

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2535240B2 (ja) * 1990-03-30 1996-09-18 キヤノン株式会社 電子写真感光体
US5415962A (en) * 1992-04-23 1995-05-16 Canon Kabushiki Kaisha Electrophotographic photosensitive member, electrophotographic apparatus using same and device unit using same
US6414104B1 (en) 1999-07-20 2002-07-02 Sri International Arylamine-substituted poly (arylene vinylenes) and associated methods of preparation and use
KR100817380B1 (ko) 2000-10-05 2008-03-27 신닛테츠가가쿠 가부시키가이샤 유기 전계발광 소자
EP2791105B1 (fr) 2011-12-12 2020-03-18 Merck Patent GmbH Composés destinés à des dispositifs électroniques

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0063528B1 (fr) * 1981-04-22 1987-08-19 EASTMAN KODAK COMPANY (a New Jersey corporation) Photoconducteurs de polymères de condensation contenant des groupes d'arylamines pendants, compositions photoconductrices et éléments électrophotographiques contenant ces photoconducteurs
US4725518A (en) * 1984-05-15 1988-02-16 Xerox Corporation Electrophotographic imaging system comprising charge transporting aromatic amine compound and protonic acid or Lewis acid
JPH0823699B2 (ja) * 1986-02-28 1996-03-06 三田工業株式会社 電子写真感光体
JPH0715583B2 (ja) * 1987-04-30 1995-02-22 富士ゼロックス株式会社 電子写真感光体
US4806444A (en) * 1987-06-10 1989-02-21 Xerox Corporation Arylamine polymers and systems utilizing arylamine polymers
US4869988A (en) * 1988-11-21 1989-09-26 Xerox Corporation Photoconductive imaging members with N,N-bis(biarylyl)aniline, or tris(biarylyl)amine charge transporting components

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10032568B2 (en) 2014-04-09 2018-07-24 National Chung Hsing University Photosensitive organic dyes for dye-sensitized solar cells

Also Published As

Publication number Publication date
AU4736989A (en) 1990-07-19
EP0376311A3 (en) 1990-09-05
EP0376311A2 (fr) 1990-07-04
DE68922083D1 (de) 1995-05-11
CA2006861C (fr) 1995-10-24
AU604429B2 (en) 1990-12-13
CA2006861A1 (fr) 1990-06-29
DE68922083T2 (de) 1995-10-26

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