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Ultrafast Charge Separation at a Single-walled Carbon Nanotube –Polymer Interface

Published online by Cambridge University Press:  02 March 2011

Samuel D. Stranks ,
Christian Weisspfennig ,
Patrick Parkinson ,
Michael B. Johnston ,
Laura M. Herz  and
Robin J. Nicholas
Samuel D. Stranks
Affiliation:
Department of Physics, Clarendon Laboratory, Parks Road, Oxford, OX1 3PU, U.K.
Christian Weisspfennig
Affiliation:
Department of Physics, Clarendon Laboratory, Parks Road, Oxford, OX1 3PU, U.K.
Patrick Parkinson
Affiliation:
Department of Physics, Clarendon Laboratory, Parks Road, Oxford, OX1 3PU, U.K.
Michael B. Johnston
Affiliation:
Department of Physics, Clarendon Laboratory, Parks Road, Oxford, OX1 3PU, U.K.
Laura M. Herz
Affiliation:
Department of Physics, Clarendon Laboratory, Parks Road, Oxford, OX1 3PU, U.K.
Robin J. Nicholas*
Affiliation:
Department of Physics, Clarendon Laboratory, Parks Road, Oxford, OX1 3PU, U.K.
*
*r.nicholas@physics.ox.ac.uk
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Abstract

We report the observation of an ultrafast (~ 430 fs) charge transfer processat the interface between a single-walled carbon nanotube (SWNT) wrapped by asemi-conducting polymer, poly(3-hexylthiophene) (P3HT), creating freepolarons on both materials. The addition of excess P3HT as a surroundingnetwork allows these free polarons to be long-lived at room temperature. Ourresults suggest that SWNT-P3HT blends incorporating only 1% fractions ofSWNTs can achieve a charge separation efficiency comparable to aconventional 60:40 P3HT-fullerene blend, provided small-diameter tubes areembedded in an excess P3HT matrix.

Keywords

luminescencenanostructurephotovoltaic

Information

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1286: Symposium E – Molecular and Hybrid Materials for Electronics and Photonics , 2011 , mrsf10-1286-e02-07
Copyright
Copyright © Materials Research Society 2011

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