The dispersion effect in solution making a positively charged monolayer photoreceptor consisting of x-type metal-free phthalocyanine (x-H2Pc) and a binder resin is studied. The photoreceptor is characterized by a high photosensitivity due to a new specific interaction between x-H2Pc and the binder resin.1 It is suggested that the characteristics of the solution structure and the chemical actions significantly affect the behavior of x-H2Pc. To clarify more this behavior, the solution state is examined by viscometry, and the solid state is examined by X-ray diffraction, transmission and scanning electron microscope, and ion potential and xerographic measurements. From these results, it was found that the dispersion process of the x-H2Pc pigment, depending on the composition and the dispersion time of the solution, significantly influences the physical properties and the electrophotographic characteristics of the monolayer photoreceptor.
Sohji Tsuchiya, Atsushi Omote, "Properties of Photoreceptor Devices Consisting of Metal Free Phthalocyanine and Polymer" in Journal of Imaging Science and Technology, 2003, pp 366 - 371, https://doi.org/10.2352/J.ImagingSci.Technol.2003.47.4.art00011