PVDF基准固态染料敏化太阳电池的研究

以聚偏氟乙烯(PVDF)为凝胶剂,分别将有机溶剂、离子液体电解质固化,并采用这两种体系的电解质分别封装成染料敏化太阳电池,测试了凝胶剂的加入量对太阳电池光电特性的影响,同时利用交流阻抗谱分析了聚合物的加入对抑制暗电流的作用。其中,有机溶剂电解质中PVDF的质量分数分别为5%、20%、25%;离子液体(甲基-丙基咪唑,MPII)电解质中PVDF的质量分数分别为0%、1%、10%。实验中制备的准固态小面积(0.25cm~2)封装电池光电转换效率均高于5.3%,PVDF含量为25%的有机溶剂型准固态电池的效率达到5.92%。此外,实验中还制备了密封的1cm~2的准固态电解质电池,并获得了6.26%的效率,此时对应的J_(SC)=15.4mA/cm~2,V_(OC)=0.672V,FF=60.5%。

STUDY OF PVDF BASED QUASI SOLID STATE DYE-SENSITIZED SOLAR CELLS

Polyvinylidene fluoride (PVDF) was used to solidify the organic solvent based electrolytes and ion liquid electrolytes , respectively for fabrication of quasi-solid state dye-sensitized solar cells.The influence of gelator content on photovoltaic characters was studied, and impedance spectra measurement was employed to analyze dark current suppressing effect of the gelators.In organic solvent electrolytes, the content of PVDF was 5% , 20% and 25% , respectively, while in ion liquid electrolytes, it was 0%, 1% and 10% separately.For small area (0.25cm~2) solar cells, the highest efficiency of 5.92 % was obtained for 25 % content of PVDF.For large area (1.00cm~2) solar cells, efficiency of 6.26 % was reached, accompanied with J_(sc)= 15.4 mA/cm~2 , K_(oc)=0.672V, FF = 60.5%.