Electrostatographic photosensitive device comprising hole injecting and hole transport layers

A layered photosensitive device for use in electrostatographic copying which comprises from the bottom up:

• (a) an electrically conductive substrate;
• (b) a layer of material capable of injecting holes into a layer on its surface, this material being selected from the group consisting of gold and graphite;
• (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 from a charge generator in contact with said hole transport layer and electrically induced holes from the layer of injecting material;
• (d) a layer of a charge generating photoconductive material on and in operative contact with the charge transport layer;
• and
• (e) a layer of an insulating organic resin overlaying the layer of charge generating material.