Charge Transport in Carbon Nanotubes-Polymer Composite Photovoltaic Cells

Materials

Adnen Ltaief¹  Abdelaziz Bouazizi¹ 

[1] Laboratoire de Physique et Chimie des Interfaces, Faculté des Sciences de Monastir, Avenue de l’Environnement, 5019 Monastir, Tunisia; E-Mail:

关键词: carbon nanotubes;    MEH-PPV;    conduction mechanisms;    photovoltaic response;   

DOI  :  10.3390/ma2030710

来源: mdpi

【 摘 要 】

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 V_oc of 0.4 V, a short-circuit current density J_SC 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.

【 授权许可】

CC BY   
© 2009 by the authors; licensee Molecular Diversity Preservation International, Basel, Switzerland.