Anisotropic hopping conduction in spin-coated PEDOT:PSS thin films

A.M. Nardes, M. Kemerink, R.A.J. Janssen

Research output: Contribution to journalArticleAcademicpeer-review

157 Citations (Scopus)
482 Downloads (Pure)

Abstract

The charge transport in spin-coated poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) has been investigated as a function of temp. and elec. field. Both the magnitude and the transport mechanism are found to be strongly anisotropic. This striking behavior is quant. explained in terms of a morphol. model in which flattened, quasimetallic PEDOT-rich grains are organized in horizontal layers that are sepd. by continuous insulating PSS lamellas. In this model, the in-plane cond. is described by three-dimensional variable range hopping between .apprx.25 nm sized PEDOT-rich particles sepd. by subnanometer PSS barriers, while the out-of-plane cond. is described by nearest-neighbor hopping between more widely spaced mol. sites. These length scales are supported by previously reported scanning probe measurements.
Original languageEnglish
Article number085208
Pages (from-to)085208-1/7
Number of pages7
JournalPhysical Review B
Volume76
Issue number8
DOIs
Publication statusPublished - 2007

Fingerprint Dive into the research topics of 'Anisotropic hopping conduction in spin-coated PEDOT:PSS thin films'. Together they form a unique fingerprint.

Cite this