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Nat Mater. 2019 Jun;18(6):594-601. doi: 10.1038/s41563-019-0340-5. Epub 2019 Apr 15.

Multi-scale ordering in highly stretchable polymer semiconducting films.

Author information

1
Department of Chemical Engineering, Stanford University, Stanford, CA, USA.
2
Nanoscience and Technology Division, Argonne National Laboratory, Lemont, IL, USA.
3
Department of Electrical Engineering, Stanford University, Stanford, CA, USA.
4
Institute for Molecular Engineering, University of Chicago, Chicago, IL, USA.
5
Department of Materials Engineering, KU Leuven, Belgium.
6
Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, CA, USA.
7
School of Polymer Science and Engineering, University of Southern Mississippi, Hattiesburg, MS, USA.
8
Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing, China.
9
Department of Chemistry and RINS, Gyeongsang National University, Jinju, South Korea.
10
Department of Materials Science and Engineering, Stanford University, Stanford, CA, USA.
11
Corporate Research and Development, Performance Materials Technology Center, Asahi Kasei Corporation, Fuji, Shizuoka, Japan.
12
Department of Chemistry and Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, The Hong Kong University of Science and Technology, Kowloon, Hong Kong, China.
13
Material Research Center, Samsung Advanced Institute of Technology Yeongtong-gu, Suwon-si, Gyeonggi-do, South Korea.
14
Department of Chemical Engineering, Stanford University, Stanford, CA, USA. zbao@stanford.edu.

Abstract

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.

PMID:
30988452
DOI:
10.1038/s41563-019-0340-5

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