Charge Injection from Ferrocenes-dispersed Overcoat Layers to the Xerographic Photoreceptors

Abstract

Xerographic properties of Se-SeTe (Te=10, 20, 30 %) and As, Se, photoreceptors overcoated with ferrocenes-dispersed polymer films have been studied. The dark decay of all the photo-receptors increases due to positive charge injection from the overcoat layer to the photoreceptors. The injection rate in overcoated Se-SeTe photoreceptors increases with Te concentration. The overcoated As₂Se₃ photoreceptor shows the largest rate among all these photoreceptors and the charge acceptance is extremely low. The injection rate depends on the dopants in the films, and it decreases in the order of ferrocene, 1, 1'-dimethyl ferrocene and decamethyl ferrocene. From the results of ionization potential measurement using low energy photoelectron spectroscopy, it is found that the charge injection from the overcoat layer to the photoreceptor is closely related to the ionization energy difference between the ferrocenes and the photoreceptors.