Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 771, Issue -, Pages 117-123Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2018.08.136
Keywords
Metal phosphides; Nanowires; Pt-free counter electrode; Dye-sensitized solar cell; Phosphorization
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Funding
- National Natural Science Foundation of China [61504076, 21574076, U1510121]
- Fund for Shanxi 1331 Project Collaborative Innovation Center
- Fund of Fujian Key Laboratory of Photoelectric Functional Materials [FJPFM-201502]
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Nickel cobalt phosphide nanowires are fabricated on titanium foil through phosphating reaction from their nickel and cobalt hydroxide precursors, which are employed as the counter electrode materials for the dye-sensitized solar cell. Electrochemical investigations demonstrate that the ternary nickel cobalt phosphide counter electrode exhibits higher catalytic activity than that of the binary nickel phosphide and cobalt phosphide counter electrodes, which is due to that the introduction of two transition metals can adjust the valence electron and provide two electron donating active sites. The dye-sensitized solar cell with the ternary nickel cobalt phosphide counter electrode achieves a competitive photoelectric conversion efficiency of 8.01%, which is higher than that of the binary nickel phosphide (3.73%) and cobalt phosphide (2.80%) counter electrodes under the same conditions and comparable photovoltaic performance to that using the conventional platinum counter electrode (8.69%) for the dye-sensitized solar cell. (C) 2018 Elsevier B.V. All rights reserved.
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