Growth of a WSe₂/W counter electrode by sputtering and selenization annealing for high-efficiency dye-sensitized solar cells
- Authors
- Hussain, Sajjad; Patil, Supriya A.; Vikraman, Dhanasekaran; Arbab, Alvira Ayoub; Jeong, Sung Hoon; Kim, Hak-Sung; Jung, Jongwan
- Issue Date
- Jun-2017
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- WSe₂; Sputtering; Counter electrode; DSSC
- Citation
- APPLIED SURFACE SCIENCE, v.406, pp.84 - 90
- Indexed
- SCIE
SCOPUS
- Journal Title
- APPLIED SURFACE SCIENCE
- Volume
- 406
- Start Page
- 84
- End Page
- 90
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/19652
- DOI
- 10.1016/j.apsusc.2017.02.111
- ISSN
- 0169-4332
- Abstract
- A chemically active and stable WSe₂/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 WSe₂/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 WSe₂ in combination. The DSSC with a novel WSe₂/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%).
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