The synthesis conditions of ionic liquid 1-vinyl-3-propylimidazolium iodide (ViPrIm(+)I(-)) and Poly(1-vinyl-3-propylimidazolium) iodide [P(ViPrIm(+)I(-))] were studied in this work. P(ViPrIm(+)I(-)) as a single-ion conductor providing iodine was designed to develop a quasi-solid polymer electrolyte based on PVDF/PEO film for dye-sensitized solar cells (DSSCs). The samples were characterized respectively by high-performance liquid chromatography (HPLC), Fourier transform infrared spectroscopy (FTIR), nuclear magnetic resonance imaging (NMRI), gel permeation chromatography (GPC), etc. The results showed that the single-ion conducting quasi-solid polymer electrolyte (SC-QPE) exhibited high ionic conductivity of 1.86 x 10(-3) S cm(-1) at room temperature measured by CHI660C Electrochemical Work-station. Moreover, solar cells assembled using the SC-QPE yielded an open-circuit voltage of 0.83V, short-circuit current of 8.01 mA cm(-2) and the conversion efficiency of 2.42%. (C) 2010 Wiley Periodicals, Inc. J Appl Polym Sci 118: 1455-1461, 2010