US 6,020,097 : Single layer bipolar electrophotographic element

Visser, Susan A. (Rochester, NY)
Rimai, Donald S. (Webster, NY)
Molaire, Michel F. (Rochester, NY)
Borsenberger, Paul M. (Hilton, NY) 
Eastman Kodak Company (Rochester, NY) 

A bipolar electrophotographic element comprising a) a single active bipolar photoconductive layer on an electrically conductive support and b) a diamond-like carbon protective layer, having a fluorine content between 0 and 65 atomic percent based on the composition of the entire protective layer, and also having a thickness between 0.05 and 0.5 μm. Also disclosed is a coating composition for a single bipolar photoconductive layer comprising: i) one or more binder polymers; ii) at least one aggregating dye salt; iii) at least one organic charge transport agent; and iv) a volatile coating solvent.