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

Abstract

Magnetic, relaxation, and dynamic parameters of polarons P₁^·+, trapped in p-toluenesulfonic aciddoped polyaniline, polarons P₂^·+, 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 P₂^·+ during diffusion along poly(3-dodecylthiophene) chains interact with P₁^·+ 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 P₂^·+ and depends on the composition of the material.