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Materials 2009, 2(3), 710-718; doi:10.3390/ma2030710

Charge Transport in Carbon Nanotubes-Polymer Composite Photovoltaic Cells

1,* , 1
1 Laboratoire de Physique et Chimie des Interfaces, Faculté des Sciences de Monastir, Avenue de l’Environnement, 5019 Monastir, Tunisia 2 Ingénierie des Matériaux Polymères, CNRS - Université Claude Bernard-Lyon 1, 43 Bd du 11 Novembre, 69100 Villeurbanne, France
* Author to whom correspondence should be addressed.
Received: 21 May 2009 / Accepted: 26 June 2009 / Published: 29 June 2009
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We investigate the dark and illuminated current density-voltage (J/V) characteristics of poly(2-methoxy-5-(2-ethylhexyloxy)1-4-phenylenevinylene) (MEH-PPV)/single-walled carbon nanotubes (SWNTs) composite photovoltaic cells. Using an exponential band tail model, the conduction mechanism has been analysed for polymer only devices and composite devices, in terms of space charge limited current (SCLC) conduction mechanism, where we determine the power parameters and the threshold voltages. Elaborated devices for MEH-PPV:SWNTs (1:1) composites showed a photoresponse with an open-circuit voltage Voc of 0.4 V, a short-circuit current density JSC of 1 µA/cm² and a fill factor FF of 43%. We have modelised the organic photovoltaic devices with an equivalent circuit, where we calculated the series and shunt resistances.
Keywords: carbon nanotubes; MEH-PPV; conduction mechanisms; photovoltaic response carbon nanotubes; MEH-PPV; conduction mechanisms; photovoltaic response
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Ltaief, A.; Bouazizi, A.; Davenas, J. Charge Transport in Carbon Nanotubes-Polymer Composite Photovoltaic Cells. Materials 2009, 2, 710-718.

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