Journal
ELECTROCHIMICA ACTA
Volume 56, Issue 17, Pages 5904-5909Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2011.04.117
Keywords
Agarose; Gel electrolyte; Dye-sensitized solar cell; Environmental benign solvent
Categories
Funding
- National Science Council of ROC [NSC 99-2662-E-006-010-CC2, NSC 100-3113-E-007-002]
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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 x 10(-6) cm(2) 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 similar to 80% of the energy conversion efficiencies of the reference cell without agarose under the illumination at AM 1.5, 100 mW cm(-2). (C) 2011 Elsevier Ltd. All rights reserved.
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