Multi-Scale Ordering in Highly Stretchable Polymer Semiconducting Films
Polymers and High Performance Materials
Stretchable semiconducting polymers have been developed as a key component to enable skin-like wearable electronics, but their electrical performance must be improved to enable more advanced functionalities. Here, we report a solution processing approach that can achieve multi-scale ordering and alignment of conjugated polymers in stretchable semiconductors to substantially improve their charge carrier mobility. Using solution shearing with a patterned microtrench coating blade, macroscale alignment of conjugated-polymer nanostructures was achieved along the charge transport direction. In conjunction, the nanoscale spatial confinement aligns chain conformation and promotes short-range π–π ordering, substantially reducing the energetic barrier for charge carrier transport. As a result, the mobilities of stretchable conjugated-polymer films have been enhanced up to threefold and maintained under a strain up to 100%. This method may also serve as the basis for large-area manufacturing of stretchable semiconducting films, as demonstrated by the roll-to-roll coating of metre-scale films.
Wang, G. N.,
Feig, V. R.,
Chung, J. W.,
(2019). Multi-Scale Ordering in Highly Stretchable Polymer Semiconducting Films. Nature Materials, 594-601.
Available at: https://aquila.usm.edu/fac_pubs/16509