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

Xu-Hui Jin, Michael B Price, John R Finnegan, Charlotte E Boott, Johannes M Richter, Akshay Rao, S Matthew Menke, Richard H Friend, George R Whittell, Ian Manners

OAI: oai:www.repository.cam.ac.uk:1810/280338 • DOI: 10.17863/CAM.27709

Easily processed materials with the ability to transport excitons over length scales of more than 100 nanometers are highly desirable for a range of light-harvesting and optoelectronic devices. 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 π-π 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.

0303 Macromolecular and Materials Chemistry