摘要
采用偏氟乙烯-六氟丙烯共聚物[P(VDF-HFP)]胶凝3-甲氧基丙腈基液体电解质,成功制备了凝胶电解质并组装成准固态染料敏化太阳电池.差示扫描量热测试结果表明凝胶电解质的溶液-凝胶转变温度(TSG)为71℃.利用电化学方法分析了凝胶电解质中I3-/I-电对的表观扩散系数及电导率低于液体电解质的原因,同时结合暗态伏安法考察了电池内部TiO2多孔薄膜电极/电解质界面处的暗反应,分析了凝胶化对电池光伏性能的影响.进一步老化实验结果表明凝胶电池的稳定性明显优于液体电池.
A quasi-solid-state dye-sensitized solar cell （DSC） was fabricated using poly（vinylidenefluoride-co-hexafluoropylene） [P（VDF-HFP）] as a polymer gelator to form gel electrolyte. The differential scanning calorimetry measurement showed the solution-to-gel transition temperature （TSG） of the gel was about 71 ℃. It was found that the gelation decreased the apparent diffusion coefficient （Dapp） values of triiodide and iodide ions and the conductivity in electrolyte. The influence of gelation on the charge recombination at the dyed TiO2 mesoscopic electrode/electrolyte interface was investigated by adopting a linear sweep voltammetry technology. The result showed that the gelation increased the dark reaction at the dyed TiO2 mesoscopic electrode/electrolyte interface. The result of the accelerated aging test showed that the gel electrolyte based DSC exhibited much better stability than the device based on the liquid electrolyte.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
2009年第19期2253-2257,共5页
Acta Chimica Sinica
基金
国家重点基础研究发展规划(No.2006CB202600)
中国科学院知识创新(No.KGCX2-YW-326)
安徽省科技攻关(No.06012024A)资助项目
关键词
凝胶电解质
表观扩散系数
电导率
染料敏化
太阳电池
gel electrolyte
apparent diffusion coefficient
conductivity
dye-sensitized
solar cell
作者简介
E—mail：sydai@ipp．ac．cn
