Performance of V2O3@C composites via a sol–gel precursor assisted by soluble starch as Pt-free counter electrodes for dye sensitized solar cells
| Autor: | Ruitao Wu, Dandan Yang, Jianing Guo, Pengyuan Fu, Yanhui Zheng, Kezhong Wu, Mingxing Wu |
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| Rok vydání: | 2021 |
| Předmět: |
Auxiliary electrode
Materials science Renewable Energy Sustainability and the Environment Carbonization Cost effectiveness Starch 020209 energy Energy conversion efficiency 02 engineering and technology 021001 nanoscience & nanotechnology Catalysis chemistry.chemical_compound Dye-sensitized solar cell chemistry 0202 electrical engineering electronic engineering information engineering General Materials Science Composite material 0210 nano-technology Sol-gel |
| Zdroj: | Solar Energy. 213:126-135 |
| ISSN: | 0038-092X |
| DOI: | 10.1016/j.solener.2020.11.026 |
| Popis: | The traditional counter electrodes (CEs) catalysts are mainly noble Pt-based materials, but their scarcity and high cost impede their practical applications, especially in dye sensitized solar cells (DSSCs). Hence, identifying Pt-free catalyst materials for CEs have been regarded as one of the crucial steps to improve energy conversion efficiency and cost effectiveness of DSSCs. Herein, a feasible one-step reduction was put forward to prepare V2O3@C composites utilizing V2O5 as metal sources, and the soluble starch as carbon source. The four V2O3@C composite catalysts have successfully been prepared and further were applied to CEs as catalytic materials in the encapsulation of DSSCs. The power conversion efficiencies (PCE) of 2.79, 3.94, 5.13 and 4.97% were respectively obtained from mass ratios of the soluble starch to V2O5 with 1:2, 1:1, 2:1 and 4:1 as counter electrode for the regeneration of I3−/I− redox couples. The enhanced performance can be ascribed to the number of active catalytic sites and the distribution channels on the V2O3@C composites CEs, which was caused by that the larger surface area and higher conductivity of amorphous C from the pyrolyzed carbonization of the soluble starch in the precursor. |
| Databáze: | OpenAIRE |
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