| abstract |
Disclosed is a layered photosensitive device for use in electrostatographic copying. The device comprises: n (a) an electrically conductive substrate; n (b) a layer of material capable of injecting holes into a layer on its surface; n (c) a hole transport layer in operative contact with the layer of hole injecting material which transport layer comprises a combination of a highly insulating organic resin having dispersed therein small molecules of an electrically active material, the combination of which is substantially non-absorbing to visible light but allows injection of photogenerated holes fom a charge generator layer in contact with said hole transport layer and electrically induced holes from the layer of injecting material; n (d) a layer of a charge generating photoconductive material on and in operative contact with the charge transport layer; and n (e) a layer of an insulating organic resin overlaying the layer of charge generating material. |