Optimum Grain Size of Copper Phthalocyanine Pigments in Organic Thin Film Photoreceptors

One of the great concerns in the study of organic thin film photoreceptors is to enhance the efficiency of thin film photoreceptors. This efficiency is to a great degree, affected by pigment grain size dispersed in charge generation layer. In the first part of the project the average crystallite domain size and the root-mean-square strain of non milled sample of copper phthalocyanine and samples milled for 90, 180, 270 minutes have been determined using X-ray diffraction data and variance method. These samples were used as charge generation layers in the organic photoreceptors and their performances wereevaluated. In the second part, copper phthalocyanine pigments were milled for 15, 30, 60, 90, 180, 270, 360, 600 minutes and their microstructures were studied as a function of milling time. Then the optimum grain size of pigments (in organic photoreceptors) were investigated. J. Color Sci. Tech. 4(2010), 33-39 © Institute for Color Science and Technology.