Carrier generation efficiency measurements on dispersions of photoconductive particles

A method for determining quantum efficiencies of carrier generation of photoconductive particles dispersed in inert polymer matrices is proposed. It has been applied to study generation efficiencies in x phase of x-metal-free phthalocyanine dispersed in a polystyrene n-butylmethacrylate copolymer matrix. Data for pigment concentration from 1% to 20% by weight give consistent values for the generation efficiencies, confirming the value of the proposed method.