Nonlinear transport in semiconducting polymers at high carrier densities.

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 with mobilities around 10(-4) cm(2) V(-1) s(-1) to a recent report 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'.

[1]  F. Haldane,et al.  Luttinger liquid theory of one-dimensional quantum fluids. I. Properties of the Luttinger model and their extension to the general 1D interacting spinless Fermi gas , 1981 .

[2]  R. Friend,et al.  New semiconductor device physics in polymer diodes and transistors , 1988, Nature.

[3]  Fisher,et al.  Transport in a one-channel Luttinger liquid. , 1992, Physical review letters.

[4]  Johannes Voit,et al.  One-dimensional Fermi liquids , 1995, cond-mat/9510014.

[5]  Zhen Yao,et al.  Carbon nanotube intramolecular junctions , 1999, Nature.

[6]  Leon Balents.  Orthogonality Catastrophes in Carbon Nanotubes , 1999 .

[7]  Leon Balents,et al.  Luttinger-liquid behaviour in carbon nanotubes , 1998, Nature.

[8]  Pasquale Sodano,et al.  Field theories for low-dimensional condensed matter systems : spin systems and strongly correlated electrons , 2000 .

[9]  A. B. Kaiser,et al.  Conduction mechanisms in polyacetylene nanofibres , 2002 .

[10]  H S J van der Zant,et al.  One-dimensional conduction in charge-density-wave nanowires. , 2004, Physical review letters.

[11]  K. Akagi,et al.  One-dimensional transport in polymer nanofibers. , 2004, Physical review letters.

[12]  Youngwook Park,et al.  Non-Ohmic conduction in polydiacetylene thin films , 2005 .

[13]  Maxim Shkunov,et al.  Liquid-crystalline semiconducting polymers with high charge-carrier mobility , 2006, Nature materials.

[14]  A. S. Dhoot,et al.  Voltage-induced metal-insulator transition in polythiophene field-effect transistors. , 2006, Physical review letters.

[15]  Philip Kim,et al.  Electron transport in a multichannel one-dimensional conductor: molybdenum selenide nanowires. , 2006, Physical review letters.

[16]  M Monteverde,et al.  Tomonaga-Luttinger liquid and Coulomb blockade in multiwall carbon nanotubes under pressure. , 2006, Physical review letters.

[17]  R. J. Kline,et al.  High Carrier Mobility Polythiophene Thin Films: Structure Determination by Experiment and Theory† , 2007 .

[18]  J. Northrup,et al.  Atomic and electronic structure of polymer organic semiconductors: P3HT, PQT, and PBTTT , 2007 .

[19]  Martin Heeney,et al.  Undoped polythiophene field-effect transistors with mobility of 1cm2V−1s−1 , 2007 .

[20]  Daniel Moses,et al.  Electrochemical doping in electrolyte-gated polymer transistors. , 2007, Journal of the American Chemical Society.