QUASI SOLID-STATE NANO COMPOSITE POLYMER ELECTROLYTES BASED ON PVDF-PEO BLEND AND THEIR APPLICATIONS IN DYE SENSITIZED SOLAR CELLS
In order to obtain the best, solidified polymeric electrolyte to be used in dye sensitized solar cell (DSSC) applications, the effect of solidification, crystallinty, redox couple concentration, choice of cations and additives in the polymer electrolytes were investigated with the blend of poly(vinyldiene-fluoride) (PVdF) and polyethelne oxide (PEO). The best electrolyte with maximum solidification suitable for DSSCs showed high ionic conductivity in the order of ～10-2 S cm-1 at 343 K. The addition of ionic liquid 1-ethyl-3-methylimidazolium-bis(trifluoromethylsulfonyl) imide (EMITFSI) and nano size filler TiO2 to the electrolyte reduced the crystallinity and enhanced the conductivity of the electrolyte. Out of various compositions studied, the best solidified polymeric electrolyte had the composition PVDF (3.78%): PEO (3.78%): PC (26.44%): EC (26.44%): CAN (11.87%): KI (3.78%) I2 (0.06%): EMITFSI (23.11%): TiO2 (0.76%): by weight ratio, and showed the lowest crystallinity, highest conductivity and the best photo-conversion efficiency in DSSCs fabricated using TiO2 electrodes sensitized with Ruthenium polypyridyl (N719) dye. The cells delivered～13 mA cm-2 photo current density with an open circuit voltage of～666 mV, yielding efficiencies ～5%.
W.S.S.GUNATHILAKE G.K.R. SENADEERA P. EKANAYAKE V. SENEVIRATNE M.A.K.L. DISSANAYAKE A.D.L.C. PERERA
Institute of Fundamental Studies, Knady, Sri Lanka Department of Physics, University of Peradeniya, Peradeniya, Sri Lanka Department of Chemistry, University of Peradeniya, Peradeniya, Sri Lanka
国际会议
The 12th Asian Conference on Solid State Ionics(第十二届亚洲固态离子学会议暨第十五届中国固态离子学会议)
武汉
英文
1167-1174
2010-05-02（万方平台首次上网日期，不代表论文的发表时间）