中文摘要：

以琼脂糖为聚合物基质,N-甲基吡咯烷酮为溶剂,磁性纳米粒子四氧化三铁为无机纳米颗粒添加剂制备了用于染料敏化太阳能电池（DSSC）的磁性聚合物电解质.通过研究不同小分子表面活性剂,聚乙二醇（PEG200）、曲拉通（TritonX-100）、乙酰丙酮和三者混合的表面活性剂对掺杂有1%（w）Fe3O4的磁性聚合物电解质离子电导率的影响,发现PEG200的加入可有效提高琼脂糖基磁性聚合物电解质的离子电导率.同时,对不同PEG200浓度添加下的电解质进行离子电导率测试研究发现：当PEG200加入量为61.8%（w）时,电解质具有最佳的离子电导率（2.88×10-3S·cm-1）;对染料敏化太阳能电池进行电化学交流阻抗谱（EIS）测试的结果表明：染料敏化太阳能电池的电子寿命和复合电阻随着PEG200浓度的增加是先增大后减小,最大的电子寿命和复合电阻出现在PEG200浓度为68.3%（w）处.

英文摘要：

In order to enhance the dispersion of Fe 3 O 4 nanoparticles in polymer electrolytes for dye-sensitized solar cell（DSSC）applications,the ionic conductivity of the polymer electrolytes with different small molecular surfactants was studied.The surfactants used were polyethylene glycol（PEG 200 ）,Triton X-100,acetyl acetone,and mixture of these three active agents at 1%（w）doping concentration of Fe 3 O 4 nanoparticles in electrolyte.Comparison of the electrochemical properties of Fe 3 O 4 -doped polymer electrolytes containing different surfactants showed that PEG 200 was suitable for modifying Fe 3 O 4 nanoparticles to disperse in agarose-based polymer electrolytes.When the mass fraction of PEG 200 was 61.8%（w）,the electrolyte had excellent conductivity（2.88×10 -3 S·cm -1 ）.Electrochemical impedance spectra （EIS）revealed that when the concentration of PEG 200 increased,the electron lifetime and combination resistance of a dye-sensitized solar cell increase initially and then decreasd.The longest electron lifetime and the largest combination resistance were achieved when the concentration of PEG 200 was 68.3%（w）.