The production of cobalt sulfide/graphene composite for use as a low-cost counter-electrode material in dye-sensitized solar cells
|dc.identifier.citation||Wang, G. and Zhang, J. and Kuang, S. and Liu, S. and Zhuo, S. 2014. The production of cobalt sulfide/graphene composite for use as a low-cost counter-electrode material in dye-sensitized solar cells. Journal of Power Sources. 269: pp. 473-478.|
Cobalt sulfide (CoS)/graphene composites are prepared by a facile one-pot hydrothermal method in the presence of graphene oxide and used as a low-cost substitute for Pt to fabricate the counter electrode in dye-sensitized solar cells. TEM, SEM and AFM characterizations show that CoS nanoparticles are highly dispersed on the surface of graphene nanosheets. This unique nanostructure affords a promising synergistic effect on electrocatalytic performance for the iodide/triiodide redox reaction. Electrochemical impedance spectroscopy and Tafel polarization analyses confirm that the CoS/graphene composite indeed provides simultaneously superior electrocatalytic activity and enhanced electrical conductivity as the counter electrode for dye-sensitized solar cells. Under an illumination of AM 1.5 simulated solar light (100 mW cm−2), the dye-sensitized solar cell based on the CoS/graphene composite counter electrode achieves a conversion efficiency of 7.08%, which is comparable to that of the cell based on Pt electrode and much higher than those of the devices with CoS and graphene electrodes.
|dc.title||The production of cobalt sulfide/graphene composite for use as a low-cost counter-electrode material in dye-sensitized solar cells|
|dcterms.source.title||Journal of Power Sources|
|curtin.department||Department of Chemical Engineering|
|curtin.accessStatus||Fulltext not available|