Abstract
A chemically active and stable WSe 2 /W structure was prepared by sputtering and selenization annealing in order to replace a high-cost Pt counter electrode in dye-sensitized solar cells. The CV, EIS analysis, and Tafel curve measurements indicated that the WSe 2 /W electrode possesses high conductivity, low charge transfer resistance at the electrolyte-electrode interface, good electrocatalytic activity, and fast reaction kinetics for the a iodide/triiodide redox reaction, which are due to the synergistic effect of W and WSe 2 in combination. The DSSC with a novel WSe 2 /W counter electrode achieved a high power conversion efficiency of 8.22% under standard light illumination, which is comparable to that with a platinum (Pt)-coated FTO electrode (8.20%).
Original language | English |
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Pages (from-to) | 84-90 |
Number of pages | 7 |
Journal | Applied Surface Science |
Volume | 406 |
DOIs | |
State | Published - 1 Jun 2017 |
Keywords
- Counter electrode
- DSSC
- Sputtering
- WSe2