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Citation: SHI Cheng-Wu, DAI Song-Yuan, WANG Kong-Jia, GUO Li, PAN Xu, KONG Fan-Tai, HU Lin-Hua. Optimization of 1,2-dimethyl-3-propylimidazolium Iodide Concentration in Dye-sensitized Solar Cells[J]. Acta Physico-Chimica Sinica, ;2005, 21(05): 534-538. doi: 10.3866/PKU.WHXB20050515 shu

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

1.
Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031; School of Chemical Engineering, Hefei University of Technology, Hefei 230009

Received Date: 9 November 2004
Available Online: 15 May 2005

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 (J_sc) of 16.76 mA•cm_-3, open circuit voltage (V_oc) 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).
- 1,2-dimethyl-3-propylimidazolium iodide; Redox; Dye-sensitized; Solar cell
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