Study of charge transport in conducting polymer between electrodes with nanogaps

Tsu Hsien Ku, Ju Hung Hsu, Heh Nan Lin*, Hsin-Fei Meng, Ming Chih Chen, Show An Chen

*Corresponding author for this work

Research output: Contribution to journalArticle

2 Scopus citations


We report the study of charge transport in the conducting polymer MEH-PPV between Au electrodes with nanogaps created by atomic force microscopy nanoscratching. Two different types of charge transport, namely space-charge-limited and Ohmic conductions, are observed. For the former case, a high mobility of around 1cm2V-1s-1 at a field of 106Vcm-1 is obtained. For the latter case, a high conductivity of around 10Scm-1 is obtained and a lower limit mobility of around 5cm2V-1s-1 is calculated. The origin of this unusual result is not clear, but it may be due to the formation of single-crystalline domains between the electrodes, that facilitates three-dimensional band transport.

Original languageEnglish
Pages (from-to)2279-2283
Number of pages5
Issue number9
StatePublished - 14 May 2006

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