Bulk heterojunction organic photovoltaic based on polythiophene–polyelectrolyte carbon nanotube composites |
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| Authors: | M. Reyes-Reyes, R. L pez-Sandoval, J. Liu,D.L. Carroll |
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| Affiliation: | aInstituto de Investigación en Comunicación Optica, Universidad Autonoma de San Luis Potosí, Alvaro Obregon 64, San Luis Potosí, Mexico;bAdvanced Materials Department, IPICYT, Camino a la Presa San José 2055, Col. Lomas 4a. Sección, San Luis Potosí 78216, Mexico;cCenter for Nanotechnology and Molecular Materials, Wake Forest University, Winston-Salem, NC, USA |
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| Abstract: | ![]()
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 multiwalled 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. |
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| Keywords: | Organic solar cells Conjugated polymers Carbon nanotubes |
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