Electrophotographic photoreceptor and electrophotographic imaging apparatus employing the photoreceptor

An electrophotographic image forming apparatus comprising:

• an electrophotographic photoreceptor comprising:
• an electrically conductive substrate;
• and a photosensitive layer formed on the electrically conductive substrate, wherein the photosensitive layer comprises a titanyl phthalocyanine crystal having a major absorption peak at a wavelength of 780 nm±10 nm and a minor absorption peak having an intensity of ¾ or less of the major absorption peak at 690 nm±10 nm in the visible-infrared absorption spectrum, and a distyryl compound represented by Formula 1 below:
• where at least one hydrogen atom of the phenyl and the phenylene group can be substituted with a C1-C6 alkyl group or a C1-C6 alkoxy group;
• a charging apparatus for charging the electrophotographic photoreceptor;
• an imagewise light irradiating device for irradiating imagewise light to the charged electrophotographic photoreceptor in order to form an electrostatic latent image on the electrophotographic photoreceptor;
• a developing unit for developing the electrostatic latent image with toner in order to form a toner image on the electrophotographic photoreceptor;
• and
• a transfer unit for transferring the toner image to an image receptor,
• wherein the titanyl phthalocyanine crystal does not have an absorption peak at a wavelength of 800 nm or greater in the visible-infrared absorption spectrum and has a distinct peak at a Bragg angle (2θ) of 9.2°, 14.5°, 18.1°, 24.1°, and 27.3° (all may include an error of ±0.2°) in an X-ray diffraction spectrum.