期刊
ACS OMEGA
卷 6, 期 17, 页码 11183-11191出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsomega.0c05880
关键词
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资金
- National Natural Science Foundation of China [21973026]
- Natural Science Foundation of Hebei Province [B2019205249]
- Science Foundation of Hebei Normal University [L2019Z02]
Four different V2O3@C composite catalysts were synthesized using different proportions of V2O5 and soluble starch, resulting in improved electrode performance for DSSCs.
To replace precious Pt-based counter electrodes (CEs) with a lowcost Pt-free catalyst of CEs is still a motivating hotspot to decrease the fabrication cost of dye-sensitized solar cells (DSSCs). Herein, four different V2O3@C composite catalysts were synthesized by pyrolysis of a precursor under N-2 flow at 1100 degrees C and further served as catalytic materials of CEs for the encapsulation of DSSCs. The precursors of V2O3@C composites have been prepared via a sol-gel method using different proportions of V2O5 with soluble starch in a H2O2 solution. Power conversion efficiencies (PCEs) of 3.59, 4.79, 5.15, and 5.06% were obtained from different V2O3@C composites, with soluble starch-to-V2O5 mass ratios (S/V) of 1:2, 1:1, 2:1, and 4:1, respectively, as CEs to reduce iodide/triiodide in DSSCs. The improvement of electrode performance is due to the combined effects on the increased specific surface area and the enhanced conductivity of V2O3@C composite catalysts.
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