Coating Process for Preparation of a Charge Generation Layer
Original Publication Date: 1986-Oct-01
Included in the Prior Art Database: 2005-Mar-09
The photoconductor used in some photocopiers consists of a layered organic medium coated onto an aluminumized MYLAR* substrate. The photoconductor usually consists of at least three layers. The binder layer provides for proper adhesion of the charge-generation layer (CGL) to the aluminum substrate; the CGL contains a dye-like chlorodiane blue (CDB) that generates electron-hole pairs when exposed to light of the proper wavelength; the charge transport layer contains a material like p-diethylaminobenzaldehyde hydrazone (DEH) imbedded in a polymeric matrix for the transport of holes from the CGL to the surface of the photoconductor. Application of the CGL has been a problem because the dyes used to generate the electron-hole pairs, e.g., CDB, are almost insoluble in known solvents.