%0 Conference Paper %B SPIE Photonics Europe. Organic Optoelectronics and Photonics %D 2008 %T Carbon nanotubes and nanohorns for organic photovoltaics %A Kymakis, E %A Servati, P %A Koudoumas, E %A Amaratunga, G A J %C Strasbourg, France %S Proceedings of SPIE %V 6999 %8 07/04/2008