Photoinduced charge separation and recombination processes in fine particles of oligothiophene-C60 dyad molecules

摘要: Photoinduced charge separation and recombination processes in fine particles of octathiophene-C60 dodecathiophene-C60 dyad molecules were investigated by the subpicosecond laser photolysis method. Sizes particle samples estimated to be 60−140 nm using SEM observation dynamic light scattering measurements. Charge separated states generated within 1 ps upon 150 fs excitation both molecules. Generation yields about a half those corresponding polar solvents, indicating existence competitive deactivation pathways singlet excited states, such as exciton migration each particle. On other hand, deactivated via two-step-decay processes. Direct molecule indirect after radical cation (hole) anion (electron) observed fas...