PREPARATION AND PHOTOCONDUCTIVITY STUDY OF TIOPC NANOMETER PARTICLES

Oxotitanium phthalocyanine (TiOPc) nanometer particles dispersed in po lycarbonate (PC) resin are obtained successfully by the method of mech anical sand grinder. The mean grain sizes of TiOPc particles and the p article morphology are measured by particle size analyzer and TEM. The xerographic properties of TiOPc nanometer particles are investigated in function-separated single-layer photoreceptors that consist of TiOP c nanometer particles as the charge-generation material (CGM) and ac-n aphthalic hydrazone (alpha-NH) as the charge-transportation material ( CTM). It is found that the photosensitivity of the function-separated single-layer photoreceptor is higher than that of the double layer dev ice (same CGM and CTM). The photoconductivity-particle size relationsh ip study shows that the smaller the particle size of TiOPc, the better the photoconductivity, which may result from the large specific surfa ce area of the TiOPc nanometer particles. (C) 1998 Elsevier Science S. A. All rights reserved.