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Photovoltaic Induced Imaged Recording

IP.com Disclosure Number: IPCOM000083610D
Original Publication Date: 1975-Jun-01
Included in the Prior Art Database: 2005-Mar-01
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Shattuck, MD: AUTHOR [+2]

Abstract

Certain organic materials exhibit a photovoltaic effect of sufficient magnitude for an optically produced latent image to be developable by liquid toning techniques.

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Photovoltaic Induced Imaged Recording

Certain organic materials exhibit a photovoltaic effect of sufficient magnitude for an optically produced latent image to be developable by liquid toning techniques.

In particular, materials in the triphenylpyrazoline class combined with a binder, and suitable solvent or sensitizer containing a halogen, when coated on a substrate and illuminated with UV radiation in the form of an image, can be toned to produce a visible image with micronized chlorodiane blue, 3,3'-dichloro-4,4'- diphenyl bis-(1''-azo-2''-hydroxy-3'' naphthanilide), in hydrocarbon solvent.

A similar effect is also observed in a sandwich structure containing the above composition on a conductive substrate, and a removable upper dielectric layer with the above toner between the dielectric and photovoltaic layers.

Upon exposure to an imagewise UV radiation a migration of the toner particles occurs, such that with subsequent separation of the upper dielectric a negative image remains on one layer and a positive image on the other layer. This is in contrast to conventional photoelectrophoresis, wherein an external potential is required for particle migration.

These materials and processes have obvious applications in the area of copying and displays.

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