Acta Phys. -Chim. Sin. ›› 2008, Vol. 24 ›› Issue (12): 2327-2330.doi: 10.3866/PKU.WHXB20081230

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Influence of Additives on the Performance of Electrolytes in Dye-Sensitized Solar Cells

SHI Cheng-Wu, GE Qian, LI Bing, TAO Li, LIU Qing-An   

  1. School of Chemical Engineering, Hefei University of Technology, Hefei 230009, P. R. China
  • Received:2008-07-01 Revised:2008-09-18 Published:2008-12-04
  • Contact: SHI Cheng-Wu

Abstract: The influence of N-methylimidazole, benzimidazole, 4-tert-butylpyrdine and 3-ethyl-1-methyl-limidazoliumtrifluoroacetate (EMITA) on apparent diffusion coefficients of I-3 and I- in the electrolyte and the Pt counter electrode electrolyte interface was investigated by ultramicroelectrode and electrochemical impedance spectroscopy. The apparent diffusion coefficient of I-3 in the electrolyte decreased and charge transfer resistance at the Pt counter electrode electrolyte interface increased after the additives were added. The resistance of electrolytes decreased after addition of EMITA. A comparison of the photovoltaic performance of dye-sensitized solar cells (DSCs) containing the additives was undertaken. The additive EMITA increased the open voltage and the fill factor, and the efficiency of dye-sensitized solar cells was up to 5.72%.

Key words: Additive, Dye-sensitized solar cell, Pt counter electrode, Electrochemical impedance spectroscopy, Ultramicroelectrode


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