Semiconductive and sensitized photoconductive compositions
AssigneeMinnesota Mining and Manufacturing Company
InventorsWilliam A. Huffman, Stephen P. Birkeland, Kevin P. O'Leary
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Abstract
Semiconductive compositions are produced by the inclusion of a particular class of dyes into a polymeric binder. When the binder is an organic photoconductive binder, the dyes act as exceptionally good sensitizers for the photoconductive material.
Claims19
A photoconductive composition comprising an organic, photoconductive, polymeric binder layer and a dye comprising at least two quinoid benzene rings linked through a bridging moiety selected from the group consisting of cyclopropane, cyclobutane and .dbd.C.dbd.C.dbd..sub.n wherein n is 1 or 2, and wherein any ring carbons of the cyclopropane and cyclobutane bridging moieties not directly bonded to quinoid benzene rings are bonded to oxygen atoms to complete a carbonyl group, wherein said dye is present in a ratio of at least 0.5 .times. 10.sup.-6 moles of dye per mole of said organic, photoconductive, polymeric binder.
Dependencies are inferred from the claim text.