Journal
SOLID STATE IONICS
Volume 265, Issue -, Pages 85-91Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ssi.2014.07.019
Keywords
PMMA based electrolyte; Dye-sensitized solar cells; Efficiency enhancement; Mixed cation effect
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Funding
- International Programme in the Physical Sciences (IPPS)
- Uppsala University, Sweden
- Chalmers University of Technology, Gothenburg, Sweden
- Institute of Fundamental Studies, Kandy, Sri Lanka
- University of Peradeniya
- Postgraduate Institute of Science (PGIS), Sri Lanka
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Enhancement of efficiency by using iodide mixture (Pr4NI and I(1), instead of a single iodide salt, in N719 dye-sensitized solar cells with a polymethylmethacrylate (PMMA) based gel electrolyte is investigated. The salt ratio is varied to optimize efficiency. With 100 wt.% KI and 100 wt.% (Pr4NI) efficiencies under AM 1.5 illumination are 3.39% and 3.21%, while 22.2:77.8 wt.% ratio KI:Pr4NI shows the highest efficiency of 3.99%. This is an efficiency enhancement of 18%. Variation of efficiency with salt composition appears to correspond to the change in short circuit photocurrent density (J(sc)) and the iodide ion conductivity. (C) 2014 Elsevier B.V. All rights reserved.
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