Femtosecond Single-Particle Spectroscopy of Exciton Diffusion in Individual Copper Phthalocyanine Nanofibers (IMAGE)

Ehime University

Femtosecond Single-Particle Spectroscopy of Exciton Diffusion in Individual Copper Phthalocyanine Nanofibers

Caption

Femtosecond time-resolved single-particle spectroscopy directly visualized exciton diffusion within individual copper phthalocyanine（CuPc）nanofibers. The exciton diffusion coefficient（D）differs significantly between the η- and β-phase nanofibers, with faster diffusion in the η-phase. A “size effect” was also observed, where longer nanofibers exhibited lower D values, highlighting how molecular stacking and π–π interactions govern photoenergy transport in organic crystals.

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American Chemical Society

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