Predictive Study of Charge Transport in Disordered Semiconducting Polymers

Stavros Athanasopoulos,† James Kirkpatrick,‡ Diego Martínez,† Jarvist M. Frost,‡ Clare M. Foden,§ Alison B. Walker,*† and Jenny Nelson‡
Department of Physics, University of Bath, Bath BA2 7AY, United Kingdom, Department of Physics, Imperial College London, London SW7 2BW, United Kingdom, and CDT Oxford Ltd., Greenwich House, Madingley Rise, Madingley Road, Cambridge CB3 0TX, United Kingdom
Nano Lett., 2007, 7 (6), pp 1785–1788
DOI: 10.1021/nl0708718
Publication Date (Web): May 24, 2007
Copyright © 2007 American Chemical Society
†

 Department of Physics, University of Bath.

,
‡

 Department of Physics, Imperial College London.

,
§

 CDT Oxford Ltd.

,
*

 Corresponding author. E-mail:  a.b.walker@bath.ac.uk.

Abstract

Abstract Image

We present a theoretical study of charge transport in disordered semiconducting polymers that relates the charge mobility to the chemical structure and the physical morphology in a novel multiscale approach. Our studies, focusing on poly(9,9-dioctylfluorene) (PFO), show that the charge mobility is dominated by pathways with the highest interchain charge-transfer rates. We also find that disorder is not always detrimental to charge transport. We find good agreement with experimental time-of-flight mobility data in highly aligned PFO films.

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History

  • Published In Issue June 13, 2007
  • Received April 13, 2007
    Revised Manuscript Received May 9, 2007

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