Long-range exciton transport in conjugated polymer nanofibers prepared by seeded growth

We describe the preparation of organic semiconducting nanofibers comprising a crystalline poly(di-n-hexylfluorene) core and a solvated, segmented corona consisting of polyethylene glycol in the center and polythiophene at the ends. These nanofibers exhibit exciton transfer from the core to the lower-energy polythiophene coronas in the end blocks, which occurs in the direction of the interchain - stacking with very long diffusion lengths (>200 nanometers) and a large diffusion coefficient (0.5 square centimeters per second). This is made possible by the uniform exciton energetic landscape created by the well-ordered, crystalline nanofiber core.

Source: ScienceNOW - May 24, 2018 Category: Science Authors: Jin, X.-H., Price, M. B., Finnegan, J. R., Boott, C. E., Richter, J. M., Rao, A., Menke, S. M., Friend, R. H., Whittell, G. R., Manners, I. Tags: Materials Science reports Source Type: news