Journal
SOLAR ENERGY MATERIALS AND SOLAR CELLS
Volume 91, Issue 15-16, Pages 1478-1482Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.solmat.2007.04.023
Keywords
organic solar cells; conjugated polymers; carbon nanotubes
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It is shown that carbon nanotubes can be used to enhance carrier mobility for efficient removal of the charges in thin film polymer-conjugated/fullerene photovoltaic devices. The fabricated photovoltaic devices consist of poly(3-octylthiophene) (P3OT) polymer blended with undoped multimalled carbon nanotubes (MWNTs) and carbon nanotubes doped with nitrogen (CNx-MWNTs). Nanophase formation and dispersion problems associated with the use of carbon nanotubes in polymer devices were addressed through the generation of functional groups and electrostatic attaching of the polyelectrolyte poly(dimethyldiallylamine) chloride (PDDA) in both MWNTs and CNx-MWNT systems. The resultant nanophase was highly dispersed allowing for excellent bulk heterojunction formation. Our results indicate that CNx-MWNTs enhance the efficiency of P3OT solar cells in comparison with MWNTs. (c) 2007 Elsevier B.V. All rights reserved.
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