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Charge-transport model for conducting polymers

Kang, Stephen Dongmin and Snyder, G. Jeffrey (2017) Charge-transport model for conducting polymers. Nature Materials, 16 (2). pp. 252-257. ISSN 1476-1122. doi:10.1038/NMAT4784.

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The growing technological importance of conducting polymers makes the fundamental understanding of their charge transport extremely important for materials and process design. Various hopping and mobility edge transport mechanisms have been proposed, but their experimental verification is limited to poor conductors. Now that advanced organic and polymer semiconductors have shown high conductivity approaching that of metals, the transport mechanism should be discernible by modelling the transport like a semiconductor with a transport edge and a transport parameter s. Here we analyse the electrical conductivity and Seebeck coefficient together and determine that most polymers (except possibly PEDOT:tosylate) have s = 3 and thermally activated conductivity, whereas s = 1 and itinerant conductivity is typically found in crystalline semiconductors and metals. The different transport in polymers may result from the percolation of charge carriers from conducting ordered regions through poorly conducting disordered regions, consistent with what has been expected from structural studies.

Item Type:Article
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URLURL TypeDescription ReadCube access
Kang, Stephen Dongmin0000-0002-7491-7933
Snyder, G. Jeffrey0000-0003-1414-8682
Additional Information:© 2016 Publishers Limited, part of Springer Nature. Received 10 March 2016; Accepted 19 September 2016; Published online 14 November 2016. The authors thank H. Katz, M. L. Chabinyc, A. M. Glaudell and H.-S. Kim for valuable discussions and O.-Y. Choi for assistance in figure illustration. This work was supported by the AFOSR MURI programme under FA9550-12-1-0002. Author Contributions: S.D.K. developed the ideas and theory for this work. S.D.K. and G.J.S. prepared and edited the manuscript. The authors declare no competing financial interests.
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Air Force Office of Scientific Research (AFOSR)FA9550-12-1-0002
Issue or Number:2
Record Number:CaltechAUTHORS:20161121-084618255
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Official Citation:Charge-transport model for conducting polymers Stephen Dongmin Kang & G. Jeffrey Snyder Nature Materials 16, 252–257 (2017) doi:10.1038/nmat4784
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:72188
Deposited By: Tony Diaz
Deposited On:21 Nov 2016 19:26
Last Modified:11 Nov 2021 04:57

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