EPR study of spin interactions in the poly(3-dodecylthiophene): Fullerene/polyaniline: p-toluenesulfonic acid composite

Magnetic, relaxation, and dynamic parameters of polarons P 1 ·+ , trapped in p -toluenesulfonic aciddoped polyaniline, polarons P 2 ·+ , and fullerene radical anions photoinduced in the poly(3-dodecylthiophene)/methanofullerene composite and in mixtures of these composites have been investigated using the EPR technique. It has been shown that spin charge carriers P 2 ·+ during diffusion along poly(3-dodecylthiophene) chains interact with P 1 ·+ trapped on adjacent polymer chains of polyaniline. The exchange interaction and spin relaxation in the ternary composites is determined by the activated hopping mobility of polarons P 2 ·+ and depends on the composition of the material.