Molecular engineered conjugated polymer with high thermal conductivity
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eaar3031.full.pdf
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Author(s)
Jiang, Zhang
Xu, Yanfei
Wang, Xiaoxue
Zhou, Jiawei
Song, Bai
Lee, Elizabeth M.
Huberman, Samuel C.
Gleason, Karen K
Chen, Gang
Date Issued
March 2018
Journal
Science Advances
Publisher
American Association for the Advancement of Science (AAAS)
Citation
Xu, Yanfei et al. “Molecular Engineered Conjugated Polymer with High Thermal Conductivity.” Science Advances 4, 3 (March 2018): eaar3031 © 2018 The Authors
Version
Final published version
Abstract
Traditional polymers are both electrically andthermally insulating. The development of electrically conductive polymers has led to novel applications such as flexible displays, solar cells, and wearable biosensors. As in the case of electrically conductive polymers, the development of polymers with high thermal conductivity would open up a range of applications in next-generation electronic, optoelectronic, and energy devices. Current research has so far been limited to engineering polymers either by strong intramolecular interactions, which enable efficient phonon transport along the polymer chains, or by strong intermolecular interactions, which enable efficient phonon transport between the polymer chains. However, it has not been possible until now to engineer both interactions simultaneously. We report the first realization of high thermal conductivity in the thin film of a conjugated polymer, poly(3-hexylthiophene), via bottom-up oxidative chemical vapor deposition (oCVD), taking advantage of both strong C=C covalent bonding along the extended polymer chain and strong π-ππ stacking noncovalent interactions between chains. We confirm the presence of both types of interactions by systematic structural characterization, achieving a near-room temperature thermal conductivity of 2.2 W/m•K, which is 10 times higher than that of conventional polymers. With the solvent-free oCVD technique, it is now possible to grow polymer films conformally on a variety of substrates as lightweight, flexible heat conductors that are also electrically insulating and resistant to corrosion.
MIT Department
Massachusetts Institute of Technology. Department of Chemical Engineering
Massachusetts Institute of Technology. Department of Mechanical Engineering
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Creative Commons Attribution-NonCommercial 4.0 International
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DOI of Published Version
https://doi.org/10.1126/sciadv.aar3031
