Abstract
Functionalized C60 was reacted with 3-hexylthiophene in the presence of FeCl3 to produce a copolymer (P3HT-C60) containing 3-hexylthiophene units as the main chain, with C60 side groups. Gold nanoparticles (AuNPs) were synthesized in the presence of poly(3-hexylthiophene) (P3HT), or P3HT-C60 copolymer, using a two-phase, one–pot reaction involving the reduction of HAuCl4 by NaBH4. This approach resulted in the formation of nanocomposites where AuNPs are directly stabilized with P3HT or P3HT-C60. All the materials were characterized using UV–vis absorption and fluorescence spectroscopy, X-ray diffraction and high-resolution transmission electron microscopy, and were applied as sensitizers or co-sensitizers in dye-sensitized solar cells. The synergistic effect in the ternary component nanocomposite introduced by the presence of C60 and AuNPs resulted in devices with higher photocurrents compared to standard devices.
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