PHOTOCONDUCTIVE ELEMENT CONTAINING A PROTONIC ACID TO PROVIDE PERSISTENT CONDUCTIVITY

摘要

PHOTOCONDUCTIVE ELEMENT EXHIBITING PERSISTENT CONDUCTIVITYAbstract of the DisclosureA photoconductive element having at least two layers,namely a charge-generation layer and a charge transport layer,is disclosed. The charge-generation layer contains a finely-divided co-crystalline complex of (i) at least one polymerhaving an alkylidene diarylene group in a recurring unit and(ii) at least one pyrylium-type dye salt. The charge trans-port layer contains an organic photoconductive chargetransport material exhibiting both kinetic and thermodynamicstability. Either one or both of the charge-generation andcharge-transport layers of the element also contains aprotonic acid material. The resultant photoconductiveelement exhibits persistent conductivity.-1-