Imperial College London
Portrait Picture

ProfessorMartinHeeney

Faculty of Natural Sciences, Department of Chemistry

Professor of Organic Materials
 
 
 
//

Contact

 

+44 (0)20 7594 1248m.heeney Website

 
 
//

Location

 

401GMolecular Sciences Research HubWhite City Campus

//

Summary

 

Publications

Citation

BibTex format

@article{Kang:2016:10.1038/nmat4634,
author = {Kang, K and Watanabe, S and Broch, K and Sepe, A and Brown, A and Nasrallah, I and Nikolka, M and Fei, Z and Heeney, M and Matsumoto, D and Marumoto, K and Tanaka, H and Kuroda, SI and Sirringhaus, H},
doi = {10.1038/nmat4634},
journal = {Nature Materials},
pages = {896--902},
title = {2D coherent charge transport in highly ordered conducting polymers doped by solid state diffusion},
url = {http://dx.doi.org/10.1038/nmat4634},
volume = {15},
year = {2016}
}
Download

RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Doping is one of the most important methods to control charge carrier concentration in semiconductors. Ideally, the introduction of dopants should not perturb the ordered microstructure of the semiconducting host. In some systems, such as modulation-doped inorganic semiconductors or molecular charge transfer crystals, this can be achieved by spatially separating the dopants from the charge transport pathways. However, in conducting polymers, dopants tend to be randomly distributed within the conjugated polymer, and as a result the transport properties are strongly affected by the resulting structural and electronic disorder. Here, we show that in the highly ordered lamellar microstructure of a regioregular thiophene-based conjugated polymer, a small-molecule p-type dopant can be incorporated by solid state diffusion into the layers of solubilizing side chains without disrupting the conjugated layers. In contrast to more disordered systems, this allows us to observe coherent, free-electron-like charge transport properties, including a nearly ideal Hall effect in a wide temperature range, a positive magnetoconductance due to weak localization and the Pauli paramagnetic spin susceptibility.
AU  - Kang,K
AU  - Watanabe,S
AU  - Broch,K
AU  - Sepe,A
AU  - Brown,A
AU  - Nasrallah,I
AU  - Nikolka,M
AU  - Fei,Z
AU  - Heeney,M
AU  - Matsumoto,D
AU  - Marumoto,K
AU  - Tanaka,H
AU  - Kuroda,SI
AU  - Sirringhaus,H
DO  - 10.1038/nmat4634
EP  - 902
PY  - 2016///
SN  - 1476-4660
SP  - 896
TI  - 2D coherent charge transport in highly ordered conducting polymers doped by solid state diffusion
T2  - Nature Materials
UR  - http://dx.doi.org/10.1038/nmat4634
UR  - https://www.nature.com/articles/nmat4634
UR  - http://hdl.handle.net/10044/1/35967
VL  - 15
ER  -
Download