Effects of environmentally benign solvents in the agarose gel electrolytes on dye-sensitized solar cells

Hsin Ling Hsu, Wan Ting Hsu, Leu-Jih Perng*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

The ionic agarose gel electrolytes are prepared by using environmental benign solvents and co-solvents to improve the agarose solubility and capacities of the additives for dye-sensitized solar cells. The effects of single solvents (dimethyl sulfoxide (DMSO), propylene carbonate (PC), propylene glycol, triethylene glycol, and tetraethylene glycol) and DMSO-based co-solvents are examined on the conductivities, diffusion coefficients of triiodide, and energy conversion efficiencies. The highest conductivity, 14.2 mS cm-1, and the highest diffusion coefficient of triiodide, 2.7 × 10-6 cm2 s-1, are achieved for the electrolyte containing the co-solvent of 80 vol.% PC and 20 vol.% DMSO. The environmental benign co-solvent such as DMSO/PC can significantly increase the conversion efficiency to 3.4% with agarose compared to pure MPII with agarose (1.4%), while retaining ∼80% of the energy conversion efficiencies of the reference cell without agarose under the illumination at AM 1.5, 100 mW cm-2.

Original languageEnglish
Pages (from-to)5904-5909
Number of pages6
JournalElectrochimica Acta
Volume56
Issue number17
DOIs
StatePublished - 1 Jul 2011

Keywords

  • Agarose
  • Dye-sensitized solar cell
  • Environmental benign solvent
  • Gel electrolyte

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