TY - JOUR
T1 - Conjugated Carbon Cyclic Nanorings as Additives for Intrinsically Stretchable Semiconducting Polymers
AU - Mun, Jaewan
AU - Kang, Jiheong
AU - Zheng, Yu
AU - Luo, Shaochuan
AU - Wu, Hung Chin
AU - Matsuhisa, Naoji
AU - Xu, Jie
AU - Wang, Ging Ji Nathan
AU - Yun, Youngjun
AU - Xue, Gi
AU - Tok, Jeffrey B.H.
AU - Bao, Zhenan
N1 - Funding Information:
J.M., J.K., and J.X. were supported by Samsung Electronics. J.M. acknowledges Samsung Scholarship for financial support. G.‐J.N.W. was supported by funding from Air Force Office of Scientific Research (Grant No. FA9550‐18‐1‐0143). S.L. and G.X. were supported by the National Natural Science Foundation of China (No. 51673094 and 21790345). N.M. was supported by Japan Society for the Promotion of Science (JSPS) overseas research fellowship. The authors thank Yuji Yamaguchi from TCI for providing CPP molecules. Part of this work was performed at the Stanford Nano Shared Facilities (SNSF), supported by the National Science Foundation under Award No. ECCS‐1542152. GIXD measurement was carried out at the Stanford Synchrotron Radiation Laboratory (SSRL), a national user facility operated by Stanford University on behalf of the U.S. Department of Energy, Office of Basic Energy Sciences.
Publisher Copyright:
© 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2019/10/1
Y1 - 2019/10/1
N2 - Molecular additives are often used to enhance dynamic motion of polymeric chains, which subsequently alter the functional and physical properties of polymers. However, controlling the chain dynamics of semiconducting polymer thin films and understanding the fundamental mechanisms of such changes is a new area of research. Here, cycloparaphenylenes (CPPs) are used as conjugated molecular additives to tune the dynamic behaviors of diketopyrrolopyrrole-based (DPP-based) semiconducting polymers. It is observed that the addition of CPPs results in significant improvement in the stretchability of the DPP-based polymers without adversely affecting their mobility, which arises from the enhanced polymer dynamic motion and reduced long-range crystalline order. The polymer films retain their fiber-like morphology and short-range ordered aggregates, which leads to high mobility. Fully stretchable transistors are subsequently fabricated using CPP/semiconductor composites as active layers. These composites are observed to maintain high mobilities when strained and after repeated applied strains. Interestingly, CPPs are also observed to improve the contact resistance and charge transport of the fully stretchable transistors. ln summary, these results collectively indicate that controlling the dynamic motion of polymer semiconductors is proved to be an effective way to improve their stretchability.
AB - Molecular additives are often used to enhance dynamic motion of polymeric chains, which subsequently alter the functional and physical properties of polymers. However, controlling the chain dynamics of semiconducting polymer thin films and understanding the fundamental mechanisms of such changes is a new area of research. Here, cycloparaphenylenes (CPPs) are used as conjugated molecular additives to tune the dynamic behaviors of diketopyrrolopyrrole-based (DPP-based) semiconducting polymers. It is observed that the addition of CPPs results in significant improvement in the stretchability of the DPP-based polymers without adversely affecting their mobility, which arises from the enhanced polymer dynamic motion and reduced long-range crystalline order. The polymer films retain their fiber-like morphology and short-range ordered aggregates, which leads to high mobility. Fully stretchable transistors are subsequently fabricated using CPP/semiconductor composites as active layers. These composites are observed to maintain high mobilities when strained and after repeated applied strains. Interestingly, CPPs are also observed to improve the contact resistance and charge transport of the fully stretchable transistors. ln summary, these results collectively indicate that controlling the dynamic motion of polymer semiconductors is proved to be an effective way to improve their stretchability.
KW - cycloparaphenylene (CPP)
KW - organic field-effect transistors (OFETs)
KW - polymer semiconductors
KW - stretchable electronics
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U2 - 10.1002/adma.201903912
DO - 10.1002/adma.201903912
M3 - Article
C2 - 31489716
AN - SCOPUS:85071869496
SN - 0935-9648
VL - 31
JO - Advanced Materials
JF - Advanced Materials
IS - 42
M1 - 1903912
ER -