Electrophotographic photoconductor and electrophotographic apparatus

An electrophotographic photoconductor comprising;

• a conductive substrate;
• a single-layer photosensitive layer disposed on said conductive substrate;
• said single-layer photosensitive layer including a resin binder, a charge generation substance, a hole transport substance, and an electron transport substance;
• said single-layer photosensitive layer containing a biphenyl compound;
• said biphenyl compound is represented by the following structural formula (BP1):
• wherein RP1 is selected from the group consisting of a hydrogen atom, an optionally substituted aryl group, an optionally substituted aralkyl group, and a cycloalkyl group;
• each of RP2 to RP10 is independently selected from the group consisting of a hydrogen atom, a halogen atom, an alkyl group of 1 to 18 carbon atoms, an alkoxyl group of 1 to 18 carbon atoms, a hydroxyl group, an alkyl halide group, a cyano group, nitro group, and an alkyl-substituted amino group optionally forming a ring with a nitrogen atom;
• the substituent being selected from the group consisting of a halogen atom, an alkyl group of 1 to 6 carbon atoms, an alkoxyl group of 1 to 6 carbon atoms, a hydroxyl group, a cyano group, an amino group, a nitro group, and an alkyl halide group;
• and
• said electron transport substance includes a compound represented by the following structural formula (ET3):
• wherein each of RE9 to RE10 is independently selected from the group consisting of a hydrogen atom, an alkyl group of 1 to 12 carbon atoms, an alkoxyl group of 1 to 12 carbon atoms, an optionally substituted aryl group, a cycloalkyl group, an optionally substituted aralkyl group, and an alkyl halide group;
• the substituent being selected from the group consisting of a halogen atom, an alkyl group of 1 to 6 carbon atoms, an alkoxyl group of 1 to 6 carbon atoms, a hydroxyl group, a cyano group, an amino group, a nitro group, and an alkyl halide group.

An electrophotographic photoconductor comprising;

• a conductive substrate;
• a single-layer photosensitive layer disposed on said conductive substrate;
• said single-layer photosensitive layer including a resin binder, a charge generation substance, a hole transport substance, and an electron transport substance;
• said single-layer photosensitive layer containing a biphenyl compound;
• said biphenyl compound is represented by the following structural formula (BP1):
• wherein RP1 is selected from the group consisting of a hydrogen atom, an optionally substituted aryl group, an optionally substituted aralkyl group, and a cycloalkyl group;
• each of RP2 to RP10 is independently selected from the group consisting of a hydrogen atom, a halogen atom, an alkyl group of 1 to 18 carbon atoms, an alkoxyl group of 1 to 18 carbon atoms, a hydroxyl group, an alkyl halide group, a cyano group, nitro group, and an alkyl-substituted amino group optionally forming a ring with a nitrogen atom;
• the substituent being selected from the group consisting of a halogen atom, an alkyl group of 1 to 6 carbon atoms, an alkoxyl group of 1 to 6 carbon atoms, a hydroxyl group, a cyano group, an amino group, a nitro group, and an alkyl halide group;
• and
• said electron transport substance includes a compound represented by the following structural formula (ET4):
• wherein each of RE11 and RE12 is independently selected from the group consisting of a hydrogen atom, an alkyl group of 1 to 12 carbon atoms, an alkoxyl group of 1 to 12 carbon atoms, an optionally substituted aryl group, a cycloalkyl group, an optionally substituted aralkyl group, and an alkyl halide group;
• each of RE13 to RE17 is independently selected from the group consisting of a hydrogen atom, a halogen atom, an alkyl group of 1 to 12 carbon atoms, an alkoxyl group of 1 to 12 carbon atoms, an optionally substituted aryl group, an optionally substituted aralkyl group, an optionally substituted phenoxy group, and an alkyl halide group, two or more of the groups optionally being bonded to form a ring;
• the substituent being selected from the group consisting of a halogen atom, an alkyl group of 1 to 6 carbon atoms, an alkoxyl group of 1 to 6 carbon atoms, a hydroxyl group, a cyano group, an amino group, a nitro group, and an alkyl halide group.

An electrophotographic photoconductor comprising;

• a conductive substrate;
• a single-layer photosensitive layer disposed on said conductive substrate;
• said single-layer photosensitive layer including a resin binder, a charge generation substance, a hole transport substance, and an electron transport substance;
• said single-layer photosensitive layer containing a biphenyl compound;
• said biphenyl compound is represented by the following structural formula (BP1):
• wherein RP1 is selected from the group consisting of a hydrogen atom, an optionally substituted aryl group, an optionally substituted aralkyl group, and a cycloalkyl group;
• each of RP2 to RP10 is independently selected from the group consisting of a hydrogen atom, a halogen atom, an alkyl group of 1 to 18 carbon atoms, an alkoxyl group of 1 to 18 carbon atoms, a hydroxyl group, an alkyl halide group, a cyano group, nitro group, and an alkyl-substituted amino group optionally forming a ring with a nitrogen atom;
• the substituent being selected from the group consisting of a halogen atom, an alkyl group of 1 to 6 carbon atoms, an alkoxyl group of 1 to 6 carbon atoms, a hydroxyl group, a cyano group, an amino group, a nitro group, and an alkyl halide group;
• and
• said electron transport substance includes a compound represented by the following structural formula (ET5):
• wherein each of RE18 to RE21 is independently selected from the group consisting of a hydrogen atom, an alkyl group of 1 to 12 carbon atoms, an alkoxyl group of 1 to 12 carbon atoms, an optionally substituted aryl group, a cycloalkyl group, an optionally substituted aralkyl group, and an alkyl halide group;
• each of RE22 and RE23 is independently from the group consisting of a hydrogen atom, and an alkyl group of 1 to 12 carbon atoms;
• each of RE24 to RE31 is independently selected from the group consisting of a hydrogen atom, a halogen atom, an alkyl group of 1 to 12 carbon atoms, an alkoxyl group of 1 to 12 carbon atoms, an optionally substituted aryl group, and an alkyl halide group;
• the substituent being selected from the group consisting of a halogen atom, an alkyl group of 1 to 6 carbon atoms, an alkoxyl group of 1 to 6 carbon atoms, a hydroxyl group, a cyano group, an amino group, a nitro group, and an alkyl halide group.

An electrophotographic photoconductor comprising;

• a conductive substrate;
• a single-layer photosensitive layer disposed on said conductive substrate;
• said single-layer photosensitive layer including a resin binder, a charge generation substance, a hole transport substance, and an electron transport substance;
• said single-layer photosensitive layer containing a biphenyl compound;
• said biphenyl compound is represented by the following structural formula (BP1):
• wherein RP1 is selected from the group consisting of a hydrogen atom, an optionally substituted aryl group, an optionally substituted aralkyl group, and a cycloalkyl group;
• each of RP2 to RP10 is independently selected from the group consisting of a hydrogen atom, a halogen atom, an alkyl group of 1 to 18 carbon atoms, an alkoxyl group of 1 to 18 carbon atoms, a hydroxyl group, an alkyl halide group, a cyano group, nitro group, and an alkyl-substituted amino group optionally forming a ring with a nitrogen atom;
• the substituent being selected from the group consisting of a halogen atom, an alkyl group of 1 to 6 carbon atoms, an alkoxyl group of 1 to 6 carbon atoms, a hydroxyl group, a cyano group, an amino group, a nitro group, and an alkyl halide group;
• and
• said electron transport substance includes a compound represented by the following structural formula (ET10):
• wherein each of RE69 and RE70 is independently selected from the group consisting of a cyano group and alkoxycarbonyl group;
• RE71 is selected from the group consisting of a hydrogen atom, an alkyl group of 1 to 12 carbon atoms, and an optionally substituted aryl group;
• each of RE72 to RE76 is independently selected from the group consisting of a hydrogen atom, a halogen atom, an alkyl group of 1 to 12 carbon atoms, an alkoxyl group, an optionally substituted aryl group, an alkyl halide group, and alkyl-substituted amino group;
• each of RE77 to RE79 is independently selected from the group consisting of a hydrogen atom and an alkyl group of 1 to 12 carbon atoms:
• each of RE80 and RE81 is independently selected from the group consisting of a hydrogen atom, halogen atom, an alkyl group of 1 to 12 carbon atoms, and an optionally substituted aryl group;
• X is one of a sulfur atom and an oxygen atom;
• n is 0 or 1;
• the substituent being selected from the group consisting of a halogen atom, an alkyl group of 1 to 6 carbon atoms, an alkoxyl group of 1 to 6 carbon atoms, a hydroxyl group, a cyano group, an amino group, a nitro group, and an alkyl halide group.

An electrophotographic photoconductor comprising;

• a conductive substrate;
• a single-layer photosensitive layer disposed on said conductive substrate;
• said single-layer photosensitive layer including a resin binder, a charge generation substance, a hole transport substance, and an electron transport substance;
• said single-layer photosensitive layer containing a biphenyl compound;
• said biphenyl compound is represented by the following structural formula (BP1):
• wherein RP1 is selected from the group consisting of a hydrogen atom, an optionally substituted aryl group, an optionally substituted aralkyl group, and a cycloalkyl group;
• each of RP2 to RP10 is independently selected from the group consisting of a hydrogen atom, a halogen atom, an alkyl group of 1 to 18 carbon atoms, an alkoxyl group of 1 to 18 carbon atoms, a hydroxyl group, an alkyl halide group, a cyano group, nitro group, and an alkyl-substituted amino group optionally forming a ring with a nitrogen atom;
• the substituent being selected from the group consisting of a halogen atom, an alkyl group of 1 to 6 carbon atoms, an alkoxyl group of 1 to 6 carbon atoms, a hydroxyl group, a cyano group, an amino group, a nitro group, and an alkyl halide group;
• and
• said electron transport substance includes a compound selected from the group consisting of a compound represented by the following structural formula (ET11), a compound represented by the following structural formula (ET12), and a compound represented by the following structural formula (ET13):
• wherein each of RE82 to RE85 is independently selected from the group consisting of a hydrogen atom and a halogen atom;
• each of RE86 and RE87 is independently selected from the group consisting of a cyano group and an alkoxycarbonyl group;
• and each of RE88 to RE92 is independently selected from the group consisting of a hydrogen atom, a halogen atom, an alkyl group of 1 to 6 carbon atoms, a nitro group, and a cyano group.

An electrophotographic photoconductor comprising;

• a conductive substrate;
• a single-layer photosensitive layer disposed on said conductive substrate;
• said single-layer photosensitive layer including a resin binder, a charge generation substance, a hole transport substance, and an electron transport substance;
• said single-layer photosensitive layer containing a biphenyl compound;
• said biphenyl compound is represented by the following structural formula (BP1):
• wherein RP1 is selected from the group consisting of a hydrogen atom, an optionally substituted aryl group, an optionally substituted aralkyl group, and a cycloalkyl group;
• each of RP2 to RP10 is independently selected from the group consisting of a hydrogen atom, a halogen atom, an alkyl group of 1 to 18 carbon atoms, an alkoxyl group of 1 to 18 carbon atoms, a hydroxyl group, an alkyl halide group, a cyano group, nitro group, and an alkyl-substituted amino group optionally forming a ring with a nitrogen atom;
• the substituent being selected from the group consisting of a halogen atom, an alkyl group of 1 to 6 carbon atoms, an alkoxyl group of 1 to 6 carbon atoms, a hydroxyl group, a cyano group, an amino group, a nitro group, and an alkyl halide group;
• and
• said electron transport substance includes a compound selected from the group consisting of a compound represented by the following structural formula (ET14) and a compound represented by the following structural formula (ET15):
• wherein each of RE93 to RE96 is independently selected from the group consisting of a hydrogen atom and a halogen atom;
• each of RE97 and RE98 is independently selected from the group consisting of a cyano group and an alkoxycarbonyl group;
• and each of RE99 to RE103 is independently selected from the group consisting of a hydrogen atom, a halogen atom, an alkyl group of 1 to 6 carbon atoms, a nitro group, and a cyano group.