Photoconductive imaging member with substituted anthracene plasticizer
AssigneeXerox Corporation
InventorsMilan Stolka, John F. Yanus
Life of this patent
Estimating the term…
Abstract
Novel photoconductive imaging members are provided comprising a layer of inorganic photoconductive material contained on a supporting substrate with a contacting layer of an electrically active organic material contiguous with the photoconductive layer comprising a plasticizer of an alkyl substituted anthracene.
Claims14
An imaging member consisting essentially of a layer of photoconductive material and a contiguous layer of an electrically active organic material with the ratio of the thickness of the active layer to the photoconductive layer being maintained from about 2:1 to 200:1, said photoconductive layer exhibiting the capability of photo-excited hole generation and injection, said active organic material being capable of receiving and transporting the photo-excited holes from said photoconductive layer, wherein said active layer consists essentially of poly(N-vinylcarbazole) containing a plasticizing amount of a plasticizer selected from the group consisting of 1-isopropyl anthracene and 1,5-diisopropyl anthracene.
A method of imaging which comprises:
- a. providing an imaging member consisting essentially of a layer of photoconductive material and a contiguous layer of an electrically active organic material with the ratio of the thickness of the active layer to the photoconductive layer being maintained from about 2:1 to 200:1, said photoconductive layer exhibiting the capability of photo-excited hole generation and injection, said active organic material being capable of receiving and transporting the photo-excited holes from said photoconductive layer, wherein said active layer consists essentially of poly(N-vinylcarbazole) containing a plasticizing amount of a plasticizer selected from the group consisting of 1-isopropyl anthracene and 1,5-diisopropyl anthracene;
- b. then uniformly negatively electrostatically charging the free surface of the active layer;
- and
- c. exposing said charged layer to a source of activating radiation to which the photoconductive layer is absorbing and to which the active layer is substantially transparent and non-absorbing, the exposure being in the form of a pattern of light and shadow optically projected toward said layer, whereby photo-excited holes generated by said photoconductive layer are injected into and transported through said active layer to form a latent electrostatic image on the free surface of the active layer.
A method of imaging which comprises:
- a. providing an imaging member consisting essentially of a layer of photoconductive material and a contiguous layer of an electrically active organic material with the ratio of the thickness of the active layer to the photoconductive layer being maintained from about 2:1 to 200:1, said photoconductive layer exhibiting the capability of photo-excited hole generation and injection, said active organic material being capable of receiving and transporting the photo-excited holes from said photoconductive layer, wherein said active layer consists essentially of poly(N-vinylcarbazole) containing a plasticizing amount of a plasticizer selected from the group consisting of 1-isopropyl anthracene and 1,5-diisopropyl anthracene;
- b. then uniformly negatively electrostatically charging the free surface of the active layer;
- c. exposing said charged layer to a source of activating radiation to which the photoconductive layer is absorbing and to which the active layer is substantially transparent and non-absorbing the exposure being in the form of a pattern of light and shadow optically projected toward said layer, whereby photo-excited holes generated by said photoconductive layer are injected into and transported through said active layer to form a latent electrostatic image on the free surface of the active layer;
- d. developing the latent image to form a visible image;
- e. transferring the visible image to a receiving sheet, and
- f. repeating steps (b), (c) and (d) at least one additional time.
Dependencies are inferred from the claim text.