Multi-scale ordering in highly stretchable polymer semiconducting films


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.

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Fig. 1: Achieving multiple length scale ordering of conjugated polymers in stretchable semiconductors through a combination of the patterned-blade solution-shearing method and the nanoconfinement effect.
Fig. 2: Characterization of the electrical performance of the semiconducting films fabricated using different processes.
Fig. 3: Measurements of bandgap energies and activation energies for charge transport.
Fig. 4: Fully stretchable transistors fabricated from the SS-CONPHINE film.
Fig. 5: Large-area roll-to-roll coating of aligned, stretchable CONPHINE film.

Data availability

The authors declare that all data supporting the findings of this study are available within the paper and its Supplementary Information. Other supporting data are available from the corresponding author upon request.


  1. 1.

    Chu, B., Burnett, W., Chung, J. W. & Bao, Z. Bring on the bodyNET. Nat. News 549, 328–330 (2017).

    CAS  Article  Google Scholar 

  2. 2.

    Wang, S., Oh, J. Y., Xu, J., Tran, H. & Bao, Z. Skin-inspired electronics: an emerging paradigm. Acc. Chem. Res. 51, 1033–1045 (2018).

    CAS  Article  Google Scholar 

  3. 3.

    Someya, T., Bao, Z. & Malliaras, G. G. The rise of plastic bioelectronics. Nature 540, 379–385 (2016).

    CAS  Article  Google Scholar 

  4. 4.

    Wang, S. et al. Skin electronics from scalable fabrication of an intrinsically stretchable transistor array. Nature 555, 83–88 (2018).

    CAS  Article  Google Scholar 

  5. 5.

    Wang, N. G. J., Gasperini, A. & Bao, Z. Stretchable polymer semiconductors for plastic electronics. Adv. Electron. Mater. 4, 1700429 (2018).

    Article  Google Scholar 

  6. 6.

    Root, S. E., Savagatrup, S., Printz, A. D., Rodriquez, D. & Lipomi, D. J. Mechanical properties of organic semiconductors for stretchable, highly flexible, and mechanically robust electronics. Chem. Rev. 117, 6467–6499 (2017).

    CAS  Article  Google Scholar 

  7. 7.

    International Technology Roadmap for Semiconductors (ITRS, 2012).

  8. 8.

    Oh, J. Y. et al. Intrinsically stretchable and healable semiconducting polymer for organic transistors. Nature 539, 411–415 (2016).

    CAS  Article  Google Scholar 

  9. 9.

    Müller, C. et al. Tough, semiconducting polyethylene‐poly(3‐hexylthiophene) diblock copolymers. Adv. Funct. Mater. 17, 2674–2679 (2007).

    Article  Google Scholar 

  10. 10.

    Xu, J. et al. Highly stretchable polymer semiconductor films through the nanoconfinement effect. Science 355, 59–64 (2017).

    CAS  Article  Google Scholar 

  11. 11.

    Napolitano, S., Glynos, E. & Tito, N. B. Glass transition of polymers in bulk, confined geometries, and near interfaces. Rep. Prog. Phys. 80, 036602 (2017).

    Article  Google Scholar 

  12. 12.

    Lee, Y. et al. Deformable organic nanowire field‐effect transistors. Adv. Mater. 30, 1704401 (2018).

    Article  Google Scholar 

  13. 13.

    Eunjoo, S. et al. Stretchable and transparent organic semiconducting thin film with conjugated polymer nanowires embedded in an elastomeric matrix. Adv. Electron. Mater. 2, 1500250 (2016).

    Article  Google Scholar 

  14. 14.

    Venkateshvaran, D. et al. Approaching disorder-free transport in high-mobility conjugated polymers. Nature 515, 384–388 (2014).

    CAS  Article  Google Scholar 

  15. 15.

    Jackson, N. E. et al. Conformational order in aggregates of conjugated polymers. J. Am. Chem. Soc. 137, 6254–6262 (2015).

    CAS  Article  Google Scholar 

  16. 16.

    Wang, G. et al. Aggregation control in natural brush-printed conjugated polymer films and implications for enhancing charge transport. Proc. Natl Acad. Sci. USA 114, E10066–E10073 (2017).

    CAS  Article  Google Scholar 

  17. 17.

    Dai, L., Renner, C. B. & Doyle, P. S. The polymer physics of single DNA confined in nanochannels. Adv. Colloid. Interface Sci. 232, 80–100 (2016).

    CAS  Article  Google Scholar 

  18. 18.

    Tseng, H.-R. et al. High mobility field effect transistors based on macroscopically oriented regioregular copolymers. Nano Lett. 12, 6353–6357 (2012).

    CAS  Article  Google Scholar 

  19. 19.

    Mohammadi, E. et al. Dynamic-template-directed multiscale assembly for large-area coating of highly-aligned conjugated polymer thin films. Nat. Commun. 8, 16070 (2017).

    CAS  Article  Google Scholar 

  20. 20.

    Persson, N. E., Chu, P.-H., McBride, M., Grover, M. & Reichmanis, E. Nucleation, growth, and alignment of poly(3-hexylthiophene) nanofibers for high-performance OFETs. Acc. Chem. Res. 50, 932–942 (2017).

    CAS  Article  Google Scholar 

  21. 21.

    Chang, M., Su, Z. & Egap, E. Alignment and charge transport of one-dimensional conjugated polymer nanowires in insulating polymer blends. Macromolecules 49, 9449–9456 (2016).

    CAS  Article  Google Scholar 

  22. 22.

    Kang, I., Yun, H.-J., Chung, D. S., Kwon, S.-K. & Kim, Y.-H. Record high hole mobility in polymer semiconductors via side-chain engineering. J. Am. Chem. Soc. 135, 14896–14899 (2013).

    CAS  Article  Google Scholar 

  23. 23.

    Zheng, Z. et al. Uniaxial alignment of liquid-crystalline conjugated polymers by nanoconfinement. Nano Lett. 7, 987–992 (2007).

    CAS  Article  Google Scholar 

  24. 24.

    Zhang, G. et al. Versatile interpenetrating polymer network approach to robust stretchable electronic devices. Chem. Mater. 29, 7645–7652 (2017).

    CAS  Article  Google Scholar 

  25. 25.

    Schott, S. et al. Charge‐transport anisotropy in a uniaxially aligned diketopyrrolopyrrole‐based copolymer. Adv. Mater. 27, 7356–7364 (2015).

    CAS  Article  Google Scholar 

  26. 26.

    Shaw, L. et al. Direct uniaxial alignment of a donor–acceptor semiconducting polymer using single-step solution shearing. ACS Appl. Mater. Interfaces 8, 9285–9296 (2016).

    CAS  Article  Google Scholar 

  27. 27.

    McCulloch, I., Salleo, A. & Chabinyc, M. Avoid the kinks when measuring mobility. Science 352, 1521–1522 (2016).

    CAS  Article  Google Scholar 

  28. 28.

    Choi, H. H., Cho, K., Frisbie, C. D., Sirringhaus, H. & Podzorov, V. Critical assessment of charge mobility extraction in FETs. Nat. Mater. 17, 2–7 (2017).

    Article  Google Scholar 

  29. 29.

    Bittle, E. G., Basham, J. I., Jackson, T. N., Jurchescu, O. D. & Gundlach, D. J. Mobility overestimation due to gated contacts in organic field-effect transistors. Nat. Commun. 7, 10908 (2016).

    CAS  Article  Google Scholar 

  30. 30.

    Phan, H. et al. Electrical double‐slope nonideality in organic field‐effect transistors. Adv. Funct. Mater. 28, 1707221 (2018).

    Article  Google Scholar 

  31. 31.

    Nikolka, M. et al. Correlation of disorder and charge transport in a range of indacenodithiophene‐based semiconducting polymers. Adv. Electron. Mater. 3, 1700410 (2017).

    Google Scholar 

  32. 32.

    Liu, Y. et al. Aggregation and morphology control enables multiple cases of high-efficiency polymer solar cells. Nat. Commun. 5, 5293 (2014).

    CAS  Article  Google Scholar 

  33. 33.

    Chortos, A. et al. Highly stretchable transistors using a microcracked organic semiconductor. Adv. Mater. 26, 4253–4259 (2014).

    CAS  Article  Google Scholar 

  34. 34.

    Nikiforov, O. G. et al. Current-induced Joule heating and electrical field effects in low temperature measurements on TIPS pentacene thin film transistors. Adv. Electron. Mater. 2, 1600163 (2016).

    Article  Google Scholar 

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This work is supported by the US Department of Energy, Office of Science, Basic Energy Sciences, under award DE-SC0016523 (material characterization) and by Samsung Electronics (device fabrication and characterization). G.-J.N.W. was supported by the Air Force Office of Scientific Research (grant no. FA9550-18-1-0143). Y.-H.K. acknowledges support from the NRF Korea (2018R1A2A105078734). L.S. acknowledges support from the Kodak Graduate Fellowship. The GIXD measurements were made at beamlines 11-3 and 7-2 of the Stanford Synchrotron Radiation Light Source, which are supported by the Director, Office of Science, Office of Basic Energy Sciences, of the US Department of Energy. Part of this work was performed at the Stanford Nano Shared Facilities (SNSF), supported by the National Science Foundation under award ECCS-1542152.

Author information




J.X. and Z.B. conceived and designed the experiments; J.X., H.-C.W., A.E. and K.G. fabricated the films; J.X., H.-C.W., C.Z., A.E. and M.N. fabricated the transistor devices and made the measurements; J.X. and L.S. carried out the flow simulations; X.G., F.M.-L. and H.-C.W. did the GIXD characterizations; S.C. and V.R.F. carried out the XPS and SEM characterizations; S.W., Y.K. and Y.-Q.Z. fabricated the micro-structured blades; G.-J.N.W., T.K., Y.-H.K., and H.Y. provided the conjugated polymers; S.L., D.Z. and J.L. contributed to the initial design of the printing ink. J.W.C. and B.M. advised on the discussion of results. J.X. organized the data and wrote the first draft of the manuscript. All authors reviewed and commented on the manuscript. Z.B. directed the project.

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Correspondence to Zhenan Bao.

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Supplementary information

Supplementary Information

Supplementary Figs. 1–29, Supplementary Tables 1–6, Supplementary Video Legend 1, Supplementary References

Supplementary Video 1

Roll-to-roll coating of a large-area stretchable semiconducting film.

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Xu, J., Wu, H., Zhu, C. et al. Multi-scale ordering in highly stretchable polymer semiconducting films. Nat. Mater. 18, 594–601 (2019).

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