Hybrid organic solar cells based on nanoparticles of copper indium sulfur and conjugated polymer

Photovoltaic devices fabricated from blends of copper indium sulfur (CIS) and poly (3-hexylthiophene) (P3HT) are demonstrated and cell performance is measured. The CIS material was made into nanocrystalline particles by polyol route. Both fabrication processes and parameters are adjusted to achieve optimal cell performance. These include selection of four different solvents used for dissolving both the P3HT and CIS for the formation of active layer, different concentration of CIS mixed into the polymer material leading to proper dispersion of the nanoparticles, and different baking temperatures used to vaporize the solvent. Optimal processing conditions are discussed. However, more effort is needed to increase the energy conversion efficiency.