Acta Phys. -Chim. Sin. ›› 2005, Vol. 21 ›› Issue (05): 534-538.doi: 10.3866/PKU.WHXB20050515

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Optimization of 1,2-dimethyl-3-propylimidazolium Iodide Concentration in Dye-sensitized Solar Cells

SHI Cheng-Wu; DAI Song-Yuan; WANG Kong-Jia; GUO Li; PAN Xu; KONG Fan-Tai; HU Lin-Hua   

  1. Institute of Plasma Physics, Chinese Academy of Sciences, Hefei   230031;   School of Chemical Engineering, Hefei University of Technology, Hefei   230009
  • Received:2004-11-09 Revised:2005-01-19 Published:2005-05-15
  • Contact: DAI Song-Yuan E-mail:sydai@ipp.ac.cn

Abstract: The redox behaviors of I and I3 in 3-methoxypropionitrile (MePN) with different concentrations of 1,2-dimethyl-3-propylimidazolium iodide (DMPII) and iodine were investigated by cyclic voltammetry and electrochemical impedance spectroscopy. The photovoltaic performance of dye-sensitized solar cells (DSCs) was compared with electrolytes containing different concentrations of DMPII and iodine. The DSCs with the electrolyte (1.0 mol•dm-3 DMPII, 0.10 mol•dm-3 LiI, 0.12 mol•dm-3 I2, 0.50 mol•dm-3 4-tert-butylpyridine, in MePN) gave short circuit photocurrent density (Jsc) of 16.76 mA•cm-3, open circuit voltage (Voc) of 0.69 V, and fill factor (FF) of 0.70, corresponding to a photoelectric conversion efficiency (η) of 8.08% under one Sun (AM1.5).

Key words: 1,2-dimethyl-3-propylimidazolium iodide, Redox, Dye-sensitized, Solar cell