The application of PtFe alloy nanoparticle in counter electrode of dye-sensitized solar cell and their Shape-Dependent activity for triiodide reduction reaction
Date Issued
2014
Date
2014
Author(s)
Chang, Pei-Jen
Abstract
Many papers had pointed out that the pure Pt counter electrode (CE) mainly played as a catalyst for the redox reaction of iodide/tri-iodide (I-/I3-) in dye-sensitized solar cells (DSSCs). For the first time, PtFe alloy nanoparticles were employed as the CE for DSSCs. The CV measurements demonstrated the electrocatalytic activity of PtFe nanoparticles in the I-/I3- redox reaction . Further, the J-V characteristics exhibited that PtFe alloy nanoparticles as CE for DSSCs achieved a good power conversion efficiency(7.37% for PtFe concave cube; 7.19% for PtFe polyhedron), closed to the performance of DSSCs using Pt CE (7.32%). In this study, various PtFe nanostructures enclosed by the different oriented surfaces, such as {111}, {100} and {311} facets, were prepared through the fine adjustment of specific surfactant-crystal facet binding. When PtFe nanostructures, including polyhedron, nanocube and concave cube, were employed as the CE for DSSCs, the photovoltaic results exhibited the shape-dependent activity in the I-/I3- redox reaction. Also, the controlled alloying composition of all PtFe nanostructures was able to influence the activity of I-/I3- redox reaction due to the change of electronic state of Pt. Finally, the shape- and composition-sensitivity of these PtFe nanostructures in terms of the I-/I3- redox activity were discussed in this study.
Subjects
染料敏化太陽能電池
鐵鉑合金
形狀控制
碘催化
SDGs
Type
thesis
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