Journal
JOURNAL OF POWER SOURCES
Volume 278, Issue -, Pages 149-155Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2014.12.068
Keywords
Dye-sensitized solar cells; Counter electrode; Platinum-nickel alloy; Three-dimensional nanostructure; Electrocatalytic activity
Funding
- National Natural Science Foundation of China [21274082]
- Shanxi Province [20140110161]
- Program for New Century Excellent Talents in University [NCET-10-0926]
- Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi [020352901014]
- Scientific Research Start-up Funds of Shanxi University [020351801003]
- Ministry of Science and Technology in Taiwan [MOST 103-3113-M-110-001, MOST 103-2221-E-036-014-MY3]
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Platinum-nickel (Pt-Ni) bimetallic nanoframes with three-dimensional (3D) electrocatalytic surfaces are used as counter electrodes (CEs) for the dye-sensitized solar cell (DSSC). Cyclic voltammetry, electrochemical impedance spectroscopy, and Tafel polarization characterizations indicate that the Pt3Ni CE has a high catalytic activity for the reduction of triiodide to iodide and a low charge transfer resistance at the electrolyte/electrode interface. The DSSC based on the Pt3Ni CE achieves an enhanced photovoltaic conversion efficiency of 7.75% compared to that using the thermal decomposition Pt CE (7.26%) under full sunlight illumination (100 mW cm(-2), AM1.5 G) due to the catalytic surfaces of this 3D hollow rhombic dodecahedron nanoframes are composed of the Pt-rich structure. (C) 2014 Elsevier B.V. All rights reserved.
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