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INFRARED LIGHT BIAS TO ELIMINATE ARSENIC ALLOY PHOTORECEPTORS

IP.com Disclosure Number: IPCOM000023716D
Original Publication Date: 1978-Dec-31
Included in the Prior Art Database: 2004-Mar-31
Document File: 2 page(s) / 245K

Publishing Venue

Xerox Disclosure Journal

Abstract

A photoconductive material comprising about 65% by weight selenium and 35% by weight arsenic is employed as the compo-sition used to form the photoconductive layer of photo-receptors in xerographic copying devices, Bulk trapping of photo-excited holes occurs, being manifested as a residual potential drop or incomplete photodischarge, in such xero-graphic use, Conventional imaging light in xerographic apparatus (for example, wavelengths less than 6000 Angstrom units) is strongly absorbed by the aforementioned composition and is unable to penetrate more than about 1 micron into the material (about 99% absorption) , Light of approximately 8000 Angstrom units will, however, be weakly absorbed throughout the bulk of the composition (approximately 1% absorption in 10 microns of material), Therefore, by flooding such a photo-receptor with light of a wavelength of about 8000 Ar-strom units and an intensity of about 1 to 10 erg/sec/cm , the residual potential is diminished without significantly discharging the unexposed areas of the photoreceptor, The net result is an increase in the cycling ability of such photo-receptors,

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XEROX DISCLOSURE JOURNAL

INFRARED LIGHT BIAS TO ELIMINATE Proposed Classification
~ U~S, CL 96/l,5R
ARSENIC ALLOY PHOTORECEPTORS Int, CL G03g 5/04

A photoconductive material comprising about 65% by weight
selenium and 35% by weight arsenic is employed as the compo-~
sition used to form the photoconductive layer of photo~
receptors in xerographic copying devices, Bulk trapping of
photo~excited holes occurs, being manifested as a residual
potential drop or incomplete photodischarge, in such xero~
graphic use, Conventional imaging light in xerographic
apparatus (for example, wavelengths less than 6000 Angstrom
units) is strongly absorbed by the aforementioned composition
and is unable to penetrate more than about 1 micron into the
material (about 99% absorption) , Light of approximately 8000
Angstrom units will, however, be weakly absorbed throughout
the bulk of the composition (approximately 1% absorption in 10
microns of material), Therefore, by flooding such a photo~
receptor with light of a wavelength of about 8000 Ar~strom
units and an intensity of about 1 to 10 erg/sec/cm , the
residual potential is diminished without significantly
discharging the unexposed areas of the photoreceptor, The net
result is an increase in the cycling ability of such photo~
receptors,

Volume 3 Number 6 November/December 1978 401

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[This page contains 1 picture or other non-t...