Patent ID: 6068960
Filing Date: 2000-05-30
Classification: G03G

Abstract:
A photoreceptor fabrication method including:(a) depositing a charge generating layer;(b) depositing a first charge transport layer having a first charge carrier mobility value; and(c) depositing a second charge transport layer having a second charge carrier mobility value wherein the first charge carrier mobility value is lower than the second charge carrier mobility value to the extent that the photoreceptor upon exposure to a light source exhibits a discharge delay resulting from the slowness of the charges passing through the first charge transport layer; wherein steps (a), (b), and (c) occur in the recited order, wherein the difference in the first charge carrier mobility value and the second charge carrier mobility value is accomplished by:(i) selecting the first charge transport layer which includes a first binder and a first charge transport material and the second charge transport layer which includes a second binder and a second charge transport material, selecting the first binder to have a lesser solubility limit for the first charge transport material than the solubility limit of the second binder for the second charge transport material; or(ii) selecting the first transport layer which includes a first polymeric compound comprised of a first charge transport moiety covalently bonded to a first binder moiety and the second transport layer which includes a second polymeric compound comprised of a second charge transport moiety covalently bonded to a second binder moiety, selecting the proportion of the first charge transport moiety in the first polymeric compound to be less than the proportion of the second charge transport moiety in the second polymeric compound.