Title: Effects of environmentally benign solvents in the agarose gel electrolytes on dye-sensitized solar cells
Authors: Hsu, Hsin-Ling
Hsu, Wan-Ting
Leu, Jihperng
Department of Materials Science and Engineering
Keywords: Agarose;Gel electrolyte;Dye-sensitized solar cell;Environmental benign solvent
Issue Date: 1-Jul-2011
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 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.
URI: http://dx.doi.org/10.1016/j.electacta.2011.04.117
ISSN: 0013-4686
DOI: 10.1016/j.electacta.2011.04.117
Volume: 56
Issue: 17
Begin Page: 5904
End Page: 5909
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