Modification of Graphene based on Ba2Cu8Ni2Se12 Catalyst with CoS Nanosphere for Counter Electrode for Dye-sensitized solar cell
A novel Graphene-Ba2Cu8Ni2Se12 with CoS Nanosphere (GBC) was synthesized via a facile hydrothermal method for use as a Counter electrode (CE) in Dye-sensitized solar cells (DSSCs). In this work, the Ba2Cu8Ni2Se12 (BCNS) and CoS nanosphere were directly grown on graphene sheets with strong interaction. The morphology, electrochemical and photovoltaic performances of GBC were studied. The GBC CE in bifacial DSSCs showed higher power conversion efficiency (12.37%), which is comparable to the traditional Pt electrode (4.07%). This value noticeably that the synergetic effect of the GBC structure provides a large catalytic active area and excellent of electron transfer partway. The GBC CE exhibiting good device performance, which can serve as low-cost CE than Pt for the DSSC application.