The interplay between inter- and intra-chain charge transport in bulk polythiophene in the hopping regime has been clarified by studying the conductivity as a function of frequency (up to 3 THz), temperature and doping level. We present a model which quantitatively explains the observed crossover from quasi-one-dimensional transport to three-dimensional hopping conduction with increasing doping level. At high frequencies the conductivity is dominated by charge transport on one-dimensional conducting chains.
@article{arxiv.cond-mat/9909398,
title = {Dopant-induced crossover from 1D to 3D charge transport in conjugated polymers},
author = {J. A. Reedijk and H. C. F. Martens and H. B. Brom and M. A. J. Michels},
journal= {arXiv preprint arXiv:cond-mat/9909398},
year = {2009}
}