Hydroxygallium phthalocyanine composite pigment, electrophotographic photoconductor containing the same, and image forming device and process cartridge for image forming device using the same

An electrophotographic photoconductor, comprising:

• a conductive support, and
• a photosensitive layer disposed on the conductive support, and containing a hydroxygallium phthalocyanine composite pigment,
• wherein the hydroxygallium phthalocyanine composite pigment is a composite pigment in which an azo compound expressed by the following general formula (a) is conjugated to a hydroxygallium phthalocyanine pigment,
• wherein the hydroxygallium phthalocyanine composite pigment has diffraction peaks at least at 7.5°, 9.9°, 12.5°, 16.3°, 18.6°, 25.1°, and 28.3° on an X-ray diffraction spectrum with Bragg angle of 2θ±0.2°, using Cu-Kα X-rays:
• A(H)n General Formula (a)
• where A is a residue of an azo compound;
• H is a hydrogen atom;
• the residue A is bonded to one or more hydrogen atoms, where the number of the hydrogen atoms is expressed with n, via one or more heteroatoms which are selected from the group consisting of N and O, and form part of the residue A;
• and n is an integer of 1 to 9.

An image forming device, comprising:

• a charging unit;
• an exposing unit;
• a developing unit;
• a transferring unit;
• and
• an electrophotographic photoconductor,
• wherein the electrophotographic photoconductor comprises:
• a conductive support, and
• a photosensitive layer disposed on the conductive support, and containing a hydroxygallium phthalocyanine composite pigment,
• wherein the hydroxygallium phthalocyanine composite pigment is a composite pigment in which an azo compound expressed by the following general formula (a) is conjugated to a hydroxygallium phthalocyanine pigment,
• wherein the hydroxygallium phthalocyanine composite pigment has diffraction peaks at least at 7.5°, 9.9°, 12.5°, 16.3°, 18.6°, 25.1°, and 28.3° on an X-ray diffraction spectrum with Bragg angle of 2θ±0.2°, using Cu-Kα X-rays:
• A(H)n General Formula (a)
• where A is a residue of an azo compound;
• H is a hydrogen atom;
• the residue A is bonded to one or more hydrogen atoms, where the number of the hydrogen atoms is expressed with n, via one or more heteroatoms which are selected from the group consisting of N and O, and form part of the residue A;
• and n is an integer of 1 to 9.