Relaxation of pulse photocurrent in polyaniline

Photocurrent decaying in time observed in a polyaniline film after its illu mination with a laser pulse is considered within a three-dimensional model of conducting polymers. Photons with an energy of 2 eV generate in the film light-induced charges that remain for some time in traps and are responsib le for the photocurrent. The data on distribution of the energy depths of t raps and their population with electrons as functions of the film temperatu re and time lapsed after illumination are gained. A correlation between the photocurrent parameters and transformations in polymer is established. Pol yaniline was used in the form of emeraldin base. Films were deposited from solutions in formic acid.