Polythiophene films can be electrodeposited on modified ITO substrates, textured to increase their active surface area,
doped to enhance charge transport, and then interfaced with C<sub>60</sub> thin films to create "planar heterojunction" photovoltaic
devices with power conversion efficiencies up to 1%. Preliminary results indicate that these electrodeposited films (e-P3HT) modified with appropriate ligands can serve as hosts for semi-conducting nanoparticles (CdSe NPs). These NPs
may ultimately extend the device spectral sensitivity into the red and near-IR spectral regions.