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US 7,115,348 B2Granted
Photoreceptor for electrophotography having an overcoat layer with salt
AssigneeSamsung Electronics Co., Ltd.
InventorsJiayi Zhu, Kam Wah Law
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Abstract
Improved organophotoreceptors comprise an electrically conductive substrate; a photoconductive element comprising a charge generation compound; and an overcoat layer comprising a first binder and at least a salt, wherein the photoconductive layer is on the electrically conductive substrate, wherein the overcoat layer is on the photoconductive layer and wherein the binder is not a silsesquioxane polymer.
Claims33
An organophotoreceptor comprising:
- a) an electrically conductive substrate;
- b) a photoconductive element comprising at least a charge generation compound wherein the photoconductive layer is on the electrically conductive substrate;
- and
- c) an overcoat layer comprising a first binder and at least an inorganic ionic salt wherein the overcoat layer is on the photoconductive layer and wherein the binder is not a silsesquioxane polymer and wherein the inorganic ionic salt is dissolved during incorporation into the overcoat layer, wherein the inorganic ionic salt comprises a multivalent cation selected from the group consisting of Ca+2, Mg+2, Sr+2, Ba+2, Al+3, Co+2, Ni+2, Cu+2, and Zn+2, and wherein the inorganic ionic salt in the overcoat layer is present at a concentration between 0.5% and 50% by weight.
1 more element
An electrophotographic imaging apparatus comprising:
- (a) a light imaging component;
- and
- (b) an organophotoreceptor oriented to receive light from the light imaging component, the organophotoreceptor comprising an electrically conductive substrate and a photoconductive element on said electrically conductive substrate wherein said photoconductive element comprises a charge generation compound and an overcoat layer comprising a first binder and an inorganic ionic salt, wherein the photoconductive layer is on the electrically conductive substrate, wherein the overcoat layer is on the photoconductive layer and wherein the binder is not a silsesquioxane polymer, and wherein the inorganic ionic salt is dissolved during incorporation into the overcoat layer, wherein the inorganic ionic salt comprises a multivalent cation selected from the group consisting of Ca+2, Mg+2, Sr+2, Ba+2, Al+2, Co+2, Ni+2, Cu+2, and Zn+2, and wherein the inorganic ionic salt in the overcoat layer is present at a concentration between 0.5% and 50% by weight.
An electrophotographic imaging process comprising:
- (a) applying an electrical charge to a surface of an organophotoreceptor comprising an electrically conductive substrate;
- a photoconductive layer comprising a charge generation compound;
- and an overcoat layer comprising a first binder and at least an inorganic ionic salt, wherein the photoconductive layer is on the electrically conductive substrate, wherein the overcoat layer is on the photoconductive layer and wherein the binder is not a silsesquioxane polymer, and wherein the inorganic ionic salt is dissolved during incorporation into the overcoat layer, wherein the inorganic ionic salt comprises a multivalent cation selected from the group consisting of Ca+2, Mg+2, Sr+2, Ba+2, Al+3, Co+2, Ni+2, Cu+2, and Zn+2, and wherein the inorganic ionic salt in the overcoat layer is present at a concentration between 0.5% and 50% by weight.
- (b) imagewise exposing the surface of the organophotoreceptor to radiation to dissipate charge in selected areas and thereby form a pattern of charged and uncharged areas on the surface;
- (c) contacting the surface with a toner to create a toned image;
- and
- (d) transferring the toned image to a substrate.
4 more elements
An organophotoreceptor comprising:
- a) an electrically conductive substrate;
- b) a photoconductive element comprising at least a charge generation compound wherein the photoconductive layer is on the electrically conductive substrate;
- and
- c) an overcoat layer comprising a first binder and at least an inorganic ionic salt wherein the overcoat layer is on the photoconductive layer and wherein the binder is not a silsesquioxane polymer, wherein the inorganic ionic salt comprises a multivalent cation selected from the group consisting of Ca+2, Mg+2, Sr+2, Ba+2, Al+3, Co+2, Ni+2, Cu+2, and Zn2 and the anion is a polyatomic inorganic anion, and wherein the inorganic ionic salt in the overcoat layer is present at a concentration between 0.5% and 50% by weight.
1 more element
Dependencies are inferred from the claim text.