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Nonlinear transport in semiconducting polymers at high carrier densities

Yuen, Jonathan D and Menon, Reghu and Coates, Nelson E and Namdas, Ebinazar B and Cho, Shinuk and Hannahs, Scott T and Moses, Daniel and Heeger, Alan J (2009) Nonlinear transport in semiconducting polymers at high carrier densities. In: Nature materials, 8 (7). pp. 572-575.

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Conducting and semiconducting polymers are important materials in the development of printed, flexible, large-area electronics such as flat-panel displays and photovoltaic cells. There has been rapid progress in developing conjugated polymers with high transport mobility required for high-performance field-effect transistors (FETs), beginning(1) with mobilities around 10(-4) cm(2) V-1 s(-1) to a recent report(2) of 1 cm(2) V-1 s(-1) for poly(2,5-bis(3-tetradecylthiophen-2-yl) thieno[3,2-b] thiophene) (PBTTT). Here, the electrical properties of PBTTT are studied at high charge densities both as the semiconductor layer in FETs and in electrochemically doped films to determine the transport mechanism. We show that data obtained using a wide range of parameters (temperature, gate-induced carrier density, source-drain voltage and doping level) scale onto the universal curve predicted for transport in the Luttinger liquid description of the one-dimensional `metal'.

Item Type: Journal Article
Publication: Nature materials
Publisher: Nature publishing group
Additional Information: Copyright for this article belongs to Nature publishing group.
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 31 Dec 2009 09:13
Last Modified: 19 Sep 2010 05:37
URI: http://eprints.iisc.ac.in/id/eprint/21464

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