Abstract: To provide a gallium phthalocyanine compound, which is expressed by the following general formula (I): where R1 to R32 are each independently a hydrogen atom, an alkoxy group, an alkylthio group, an alkyl group, a halogen atom, a nitro group, or an aryl group.

Abstract: Disclosed are an organic light emitting display device with improved yield and processing efficiency, which includes an interlayer capable of being separated into a hydrophilic region and a hydrophobic region on top of a hole injection layer in an organic light emitting device and a plurality of layers including a light emitting layer and which is fabricated without using a shadow mask, as well as a method for manufacturing the same. The manufacturing method includes preparing a substrate having a plurality of pixel regions defined in a matrix form, arranging an anode in each of the pixel regions, forming a hole injection layer on the anode by the solution process, forming an interlayer with hydrophobic properties on the hole injection layer by a solution process, selectively UV irradiating the interlayer to define a hydrophilic region on the interlayer, forming a light emitting layer on the interlayer by the solution process, and arranging a cathode on the substrate having the light emitting layer.

Abstract: There are disclosed compounds for assisting triplet absorption in a laser, such as a pulsed-dye laser, the compounds comprising at least one molecule chosen from nitroxides and nitrones. In one embodiment, the disclosed compounds may be mixed with the dye of a dye laser in an amount sufficient to assist in triplet absorption. In one embodiment, the nitroxide compound comprises tempol[4-hydroxy-2,2,6,6-tetramethyl-piperidinyloxy, free radical]. Also disclosed are methods of using the disclosed compounds to control the triplet absorption of a dye laser or improve the performance or life span of a gaseous or solid laser.

Abstract: An infrared dye, characterized in that the dye comprises of Formulae 1 to 5

Abstract: A diamine compound of the following formula (1): ##STR1## wherein R.sub.1 is a hydrogen atom, a lower alkyl group or a lower alkoxy group, each of A.sub.1, A.sub.2 and A.sub.3 which are independent of one another, is a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, or a group of the following formula (2): ##STR2## wherein R.sub.1 is as defined above, and X is a substituted or unsubstituted arylene group or a substituted or unsubstituted heterocyclic bivalent group.

Abstract: A color filter formed in accordance with the invention is formed by depositing a thin film of organic pigment an on electrode by electrochemical methods. An organic pigment is included in an aqueous micellar solution that includes a surfactant that has redox reactivity. The surfactant preferably has a metallocene such as ferrocene at the hydrophobic terminal end group. A transparent substrate having a transparent electrode thereon is emersed in the micellar solution. Voltage is applied to the transparent electrode and the organic pigment will form on the transparent electrode. Conductive particles, polymer material or conductive polymer material can be included with or on the pigment. Alternatively, the polymer or conductive polymer can be layered.

Abstract: A photoreceptor includes a charge generating layer having: 1) a photogenerating pigment purified by sublimation at a pressure not greater than 10.sup.-3 Torr and subsequent condensation of the photogenerating pigment at a temperature less than about 100.degree. C.; and 2) a film-forming binder.

Abstract: An azo compound represented by the following general formula IA and an electrophotographic photosensitive member comprising a photosensitive layer containing the azo compound: ##STR1## wherein R.sup.1 and R.sup.2 are the same or different from each other and indicate a hydrogen atom, an alkyl group, an alkenyl group, a hydroxyl group, an alkoxy group, a carboxy group, an alkoxy carbonyl group, an acyl group, an aryl group, a halogen group or a cyano group, respectively; R.sup.14 indicates a hydrogen atom, a halogen group, an alkyl group, an alkoxy group, an aryl group, an amino group, a cyano group, a nitro group or a sulfoxide group; and A indicates a coupler residue having an acceptor property.

Abstract: Thin film devices including a film of a functional organic material, inorganic material or mixtures which are either insoluble or sparingly soluble in water, and deposited by electroplating. Particles of the functional material are dispersed in a micelle solution of a surfactant which is oxidizable and reducible by electrolysis in a colloidal state. Thin film devices prepared include color filters, optical recording media, electrochemical photoreceptors, nonlinear switching elements, and other devices requiring thin films of materials which are substantially insoluble in water.

Abstract: The present invention relates to an azomethine compound represented by formula (I): ##STR1## wherein X represents a 5- or 6-membered cyclic amino group, R represents an aromatic group, and Ar represents an aromatic group having an aliphatic amino group in the para-position. The azomethine compounds disclosed are useful yellow dyes for photography, for various optical filters, for ink jet, for heat transfer printing, and for printing.

Abstract: An electrophotographic printing plate comprising a conductive support having provided thereon a photoconductive insulating layer containing:(1) at least one organic photoconductive compound,(2) at least one sensitizer selected from the group consisting of compounds represented by formula (A-I), (A-II), (B), (C-I), (C-II), (C-III), (C-IV), (D) or (E); ##STR1## . (3) at least one amide compound selected from the group consisting of compounds represented by formula (I), (II), or (III); ##STR2## and (4) a binder resin soluble or dispersible in an alkaline solvent (wherein symbols in formulae are defined as in claim 1). The printing plate exhibits high sensitivity sufficient to respond to a laser light source and provides a printing plate free from background stains.

Abstract: A photosensitive member for electrophotography which comprises a photosensitive layer containing at least one member of the group consisting of thiophene structure-containing azo compounds having one of the general formulae (I) to (X): ##STR1## wherein all the symbols are defined in the specification.

Abstract: Compounds which are useful as sensitizers of photoconductors, having the general formula: ##STR1## in which: like symbols represent identical substituents,at least 4 of R.sup.1 to R.sup.9 represent hydrogen atoms and the remaining R.sup.1 to R.sup.9 pairs of groups independently represent:(i) hydrogen, an alkyl group having from 1 to 18 carbon atoms, a substituted alkyl group, or an aryl or substituted aryl group,(ii) a halogen atom, a cyano group, a carboxy or alkoxycarbonyl group, a hydroxy group, an alkoxy group, a nitro group or a sulfonic acid group, providing that not more than two such groups (ii) are present in each ring,(iii) an acylamino group, a secondary acylamino group or a tertiary amino group in which the pendant substituent groups on the nitrogen atom are alkyl, aryl or aralkyl, providing not more than two such groups (iii) may be present in each benzocarbazole ring, and(iv) any two groups R.sup.1 to R.sup.

Abstract: Trisazo compounds having the following general formula I: ##STR1## are useful as charge carrier generating materials for electrophotographic elements. Multilayer electrophotographic elements having a charge carrier generating layer containing these compounds as charge carrier generators and having a separate charge transport layer containing a charge transport material are particularly excellent in sensitivity in the 780-800 nm wavelength region.

Abstract: The present invention provides disazo compounds expressed by the general formula ##STR1## [wherein A represents ##STR2## (wherein R represents alkyl radical, alkoxy radical, nitro radical, dialkylamino radical or halogen, n is 0 or an integer ranging from 1 to 3, and R may be identical or different when n is an integer of 2 or 3)]; a process for the preparation of said compounds; and photosensitive materials having a high sensitivity as well as a high flexibility which comprises a conductive support and a photosensitive layer formed thereon, said photosensitive layer containing a disazo pigment, as an effective ingredient, which is expressed by the general formula ##STR3## [wherein R' represents a member selected from the group consisting of hydrogen, ethyl radical, chloroethyl radical and hydroxyethyl radical, A' represents a member selected from the group consisting of ##STR4## (wherein X represents a member selected from the group consisting of aromatic rings such as benzene ring, naphthalene ring, etc.

Abstract: The present invention is directed to novel amino-substituted 2-cumaryl-3'-chromenylium salts of the general formula ##STR1## wherein R.sup.3 and R.sup.7 are a dialkyl or cycloalkyl disubstituted amino group, hydrogen, or hydroxy group, provided that at least one of R.sup.3 and R.sup.7 is an amino group, R.sup.1, R.sup.2, R.sup.4, R.sup.5, R.sup.6, and R.sup.8 are hydrogen, an alkoxy group, or two of these substituents together form an aromatic ring, provided that R.sup.1, R.sup.2 and R.sup.4 may be the same or different, and R.sup.5, R.sup.6 and R.sup.8 may be the same or different, and Y.sup.- is an acidic anion and to the process for their preparation.

Abstract: An electrophotographic member having increased sensitivity to a longer wave length formulated of a complex formed by the reaction of Ninhydrin with a tertiary amine and which includes a polyalkenyl carbazole.

Abstract: A photoconductive layer sensitized by a compound of the general formula: ##STR1## in which: R.sup.1 and R.sup.2 independently represent a hydrogen atom, an alkyl or substituted alkyl group, an aryl or substituted aryl group, an aralkyl or substituted aralkyl group, a cycloaliphatic or substituted cycloaliphatic group or a heterocyclic or substituted heterocyclic group providing R.sup.1 and R.sup.2 do not both represent cyclic groups of aromatic nature, or R.sup.1 and R.sup.2 together may represent the necessary atoms to complete a non-aromatic heterocyclic ring,R.sup.3, R.sup.4, R.sup.5 and R.sup.6 independently represent a hydrogen atom or any substituent providing the sum of their .sigma..sub.p constants has a value of less than +0.5, or R.sup.3 and R.sup.4 and/or R.sup.5 and R.sup.6 may represent the necessary atoms to complete an alicyclic or aromatic ring, R.sup.3 and R.sup.2 and/or R.sup.1 and R.sup.6 may represent the necessary atoms to complete a non-aromatic heterocyclic ring,R.sup.7 and R.sup.

Abstract: An electrophotographic plate comprising a conductive substrate and a photosensitive layer containing an organic photoconductor layer composed of a hydrazone compound represented by the general formula (I): ##STR1## (wherein R.sup.1 and R.sup.2 are an alkyl, aralkyl or aryl group which may or may not have a substituent, n is a number of 1 or 2, and A is an aromatic hydrocarbyl group or aromatic heterocyclic group which may or may not have a substituent) and a binder.

Abstract: Electron donor compounds for use in electrophotographic constructions must be sensitized to desired regions of the electromagnetic spectrum. Novel bis-benzocarbazole derivatives which can be used as organic electron donor compounds have been found to be sensitized by polyquinoid and polyanthroquinoid dyes.

Abstract: Organic electron donor compounds for use in electrophotographic constructions must ordinarily be sensitized to desired regions of the electromagnetic spectrum. Highly fluorinated aliphatic sulfonyl, carbonyl, or carbonyloxy dyes have been found to be efficient sensitizers for such organic donor compounds.

Abstract: Organic electron donor compounds for use in electrophotographic constructions must ordinarily be sensitized to desired regions of the electromagnetic spectrum. Imidazo[4,5-b] quinoxaline cyanine dyes having phenylsulfonyl or benzoyl substituents have been found to be efficient sensitizers for such organic donor compounds.

Abstract: Photoconductive compositions and materials including photoconductive substances and spectral sensitizers, are described; the sensitizers comprise diazastyryl dyes represented by formula (I) ##STR1## wherein R.sub.1 represents an alkyl group, R.sub.2 represents hydrogen, an alkyl group or an alkoxy group, R.sub.3 and R.sub.4 each represent an alkyl group or R.sub.3 and R.sub.4 together represent a group completing nitrogen-containing heterocyclic groups and A represents a group completing (a) benzothiazolium ring, (b) thiazolium ring, (c) imidazolium ring, (d) triazolium ring, (e) thiadiazolium ring, (f) pyridinium ring, (g) indazolium ring or (h) indolenium ring.

Abstract: Organic electron donor compounds for use in electrophotographic constructions must ordinarily be sensitized to desired regions of the electromagnetic spectrum. Indolenine dyes having phenylsulfonyl or benzoyl substituents thereon have been found to be efficient sensitizers, particularly in the infrared portion of the electromagnetic spectrum, for such organic donor compounds.

Abstract: A photoconductive composition comprising a photoconductive substance and at least one spectral sensitizer selected from azacyanines represented by formula (I), (II), (III), (IV) or (V) ##STR1## and a photosensitive member containing such a spectral sensitizer.

Abstract: 2,6-Di-tert-Butyl-4-substituted thiopyrylium salt represented by formula (I), a process for production of said salt and a photoconductive composition containing said salt. ##STR1## wherein Z.sup..crclbar. is an anion, X is a hydrogen atom, an aryl group, a substituted aryl group or an alkyl group, and R.sup.1 and R.sup.2 are the same or different and include alkyl groups.

Abstract: An imaging method, and novel materials, in which there is provided an imaging mono-layer comprising a plurality of electrically photosensitive particles which comprise a resin carrier, a colorant dye, an electrically photosensitive organic material, a sensitizing dye, and a solubilizing agent for the sensitizing dye in the organic material. The imaging mono-layer is subjected to an electric field, exposed to a pattern of sensitizing electromagnetic radiation, separation of the photosensitized particles from the unsensitized particles, and color-amplification of the desired image by imbibing the colorant dye into a suitable substrate.

Abstract: A photoreceptor for producing copy in a full form exposure mode and in a laser mode in which the charge generative layer is overcoated with an intermediate charge transport layer which is transparent to light and through which charges can transport and a top layer overcoating the intermediate layer which is transparent to white light and absorptive and charge generative to laser light.

Abstract: For reversal development of an electrical potential pattern formed by imagewise exposure of a uniformly charged photoconductive layer, the charging of the layer is restricted to such a level below its breakdown voltage that the contact between the photoconductive layer and the toner powder used in the development step is insulating, and a magnetisable and inductively attractable toner powder is applied for the development. The toner powder is applied by means of a magnetic brush device comprising a conductive development roller which is provided with an electrical potential suited for reversal development. Preferably the photoconductive layer is charged to a level of at most 35-75% of its breakdown voltage, and a scorotron preferably is used for the charging. The photoconductive layer may comprise a photoconductive polymer and/or a bisazo pigment as photosensitive compound, or may be a layer of "pink" zinc oxide dispersed in a binder.

Abstract: 2,6-Di-tert-butyl-4-[5-(2,6-di-tert-butyl-4H-thiopyran-4-ylidene)penta-1,3- dienyl]thiopyrylium salts, which are novel, colorless, transparent, having an adsorption in the far infrared to near infrared region and capable of imparting high sensitivity to photoconductive substance; process for producing the salts; and a photoconductive composition containing the salt.

Abstract: An electrophotographic plate comprising a conductive substrate and a photosensitive layer containing an organic photoconductor layer composed of a hydrazone compound represented by the general formula (I): ##STR1## (wherein R.sup.1 and R.sup.2 are an alkyl, aralkyl or aryl group which may or may not have a substituent, n is a number of 1 or 2, and A is an aromatic hydrocarbyl group or aromatic heterocyclic group which may or may not have a substituent) and a binder.

Abstract: This invention relates to an improvement in an electrophotographic recording material comprising an electrically conductive support, in particular a support adapted for the preparation of printing forms or printed circuits, and a panchromatically sensitized photoconductive layer which comprises an organic photoconductor, a binder, a sensitizing dye, and conventional additives, the improvement that the photoconductive layer contains, as the sensitizing dye, a mixture of a polymethine dye and a triarylmethane dye which absorb, respectively, between about 400 and 550 nm and between about 550 nm and 720 nm.

Abstract: In a photosensitive material for electrophotography, an intermediate layer comprising an organic polymeric photoconductor and a polycyclic aromatic nitro compound at a specific ratio is formed on an electrically conductive substrate, and a top layer comprising, incorporated in a binder, phthalocyanine or phthalocyanine derivative and the above polycyclic aromatic nitro compound at a specific ratio is laminated on the intermediate layer. In this photosensitive material, the dark decay speed is controlled in a range suitable for application to the repeated copying operation and the residual potential left on the exposure area can be reduced to a negligible level. Accordingly, occurrence of fogging is prevented and the toner transfer efficiency is improved. Further, this photosensitive material has improved mechanical, chemical and electric durabilities, and therefore, the life of the photosensitive material is remarkably prolonged.

Abstract: The present invention provides an electrophotographic sensitive element which comprises an electroconductive support and a photosensitive layer formed thereon and containing some charge-carrier generating pigment and a specific charge transfer substance. Said specific charge transfer substance is just a substance selected from well-known photoconductive substances, but when it is applied in combination with a charge-carrier generating pigment, it renders a photosensitive element having a remarkably improved sensitivity.