P3HT/PCBM/SWNTs photovoltaic devices

摘要

It is shown that the introduction of functionalized single-walled carbon nanotubes SWNTs in bulk heterojunction polymer-fullerene photovoltaic devices results in an improvement of both the short circuit current density and the fill factor. An optimum performance with a power conversion efficiency of 1.4% is obtained with 0.5 wt% of SWNTs in a (1:1) P3HT/PCBM mixture. The results indicate that the addition of nanotubes enhances the performance of polymer-fullerene photovoltaic cells by means of both the electron accepting feature of fullerenes and the high electron transport capability of SWNTs.