作者
Jie Xu,Hung‐Chin Wu,Chong Zhu,Anatol Ehrlich,Leo Shaw,Mark Nikolka,Sihong Wang,Francisco Molina‐Lopez,Xiaodan Gu,Siwei Luo,Dongshan Zhou,Yun‐Hi Kim,Ging‐Ji Nathan Wang,Kevin Gu,Vivian R. Feig,Shu‐Cheng Chen,Yeongin Kim,Tōru Katsumata,Yu-Qing Zheng,He Yan,Jong Won Chung,Jeffrey Lopez,Boris Murmann,Zhenan Bao
摘要
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.