The production of cobalt sulfide/graphene composite for use as a low-cost counter-electrode material in dye-sensitized solar cells
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 ar...
| Main Authors: | , , , , |
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| Format: | Journal Article |
| Published: |
Elsevier SA
2014
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| Online Access: | http://hdl.handle.net/20.500.11937/16031 |
| _version_ | 1848749057345847296 |
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| author | Wang, G. Zhang, J. Kuang, S. Liu, Shaomin Zhuo, S. |
| author_facet | Wang, G. Zhang, J. Kuang, S. Liu, Shaomin Zhuo, S. |
| author_sort | Wang, G. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | 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. |
| first_indexed | 2025-11-14T07:14:53Z |
| format | Journal Article |
| id | curtin-20.500.11937-16031 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:14:53Z |
| publishDate | 2014 |
| publisher | Elsevier SA |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-160312017-10-02T02:28:15Z The production of cobalt sulfide/graphene composite for use as a low-cost counter-electrode material in dye-sensitized solar cells Wang, G. Zhang, J. Kuang, S. Liu, Shaomin Zhuo, S. 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. 2014 Journal Article http://hdl.handle.net/20.500.11937/16031 10.1016/j.jpowsour.2014.07.018 Elsevier SA restricted |
| spellingShingle | Wang, G. Zhang, J. Kuang, S. Liu, Shaomin Zhuo, S. The production of cobalt sulfide/graphene composite for use as a low-cost counter-electrode material in dye-sensitized solar cells |
| title | The production of cobalt sulfide/graphene composite for use as a low-cost counter-electrode material in dye-sensitized solar cells |
| title_full | The production of cobalt sulfide/graphene composite for use as a low-cost counter-electrode material in dye-sensitized solar cells |
| title_fullStr | The production of cobalt sulfide/graphene composite for use as a low-cost counter-electrode material in dye-sensitized solar cells |
| title_full_unstemmed | The production of cobalt sulfide/graphene composite for use as a low-cost counter-electrode material in dye-sensitized solar cells |
| title_short | The production of cobalt sulfide/graphene composite for use as a low-cost counter-electrode material in dye-sensitized solar cells |
| title_sort | production of cobalt sulfide/graphene composite for use as a low-cost counter-electrode material in dye-sensitized solar cells |
| url | http://hdl.handle.net/20.500.11937/16031 |