P(VDF-HFP)基凝胶电解质染料敏化纳米TiO_2薄膜太阳电池  

Dye-sensitized Nano-TiO_2 Thin Memberane Solar Cells Based on P(VDF-HFP)-type Gel Electrolytes

作　　者：郭力[1] 戴松元[1] 王孔嘉[1] 方霞琴[1] 史成武 潘旭[1] 

机构地区：[1]中国科学院等离子体物理研究所,合肥230031

出　　处：《高等学校化学学报》2005年第10期1934-1937,共4页Chemical Journal of Chinese Universities

基　　金：国家重点基础研究发展规划项目(批准号:G2000028200)资助.

摘　　要：采用循环伏安法(CV)研究了凝胶电解质中I- 3/I-氧化还原行为, 凝胶电解质中I- 3/I-的表观扩散系数和相应的稳态扩散电流明显低于液体电解质. 通过对阴/阳离子的结合能和孔穴阻塞作用的研究解释了凝胶电解质电导率较液体电解质发生变化的原因. 制备的凝胶电解质电池具有较高的光电转换效率(6.6%), 其短路电流密度( J sc )仅比液体电解质电池低0.3～0.4 mA/cm2, 电池效率也仅低约0.6%.The I3^-/I^- redox behavior for gel electrolytes and liquid electrolyte was studied by cyclic voltammetry. It is found that the apparent diffusion coefficient（D） values of triiodide and iodide ions in gel electrolytes were apparently lower than those in liquid electrolyte, the former were about third of the latter. The conductivity measurement of the gel electrolyte containing different sum of P（VDF-HFP） shows that the conductivity decreases with increasing the sum of P（VDF-HFP） in gel electrolyte. It may be due to that the pore is not well connected and the ionic transport is hindered by the pore blockage. We fabricated quasi-solid state dye-sensitized nano-thin membrane solar cells using gel electrolyte containing poly （vinylidenefluoride-cohexafluoropropylene） （PVDF-HFP） which showed an comparable photo-electric conversion efficiency to the liquid cell. The quasi-solid state solar cell with 5% P（VDF-HFP） showed the values of 0.70 V for open-circuit voltage, 15.52 mA/cm^2 for short-circuit photocurrent density, 0.62 and 6.61% for Fill Factor and photoelectric conversion efficiency under the illustration of AM 1.5（ 100 mW/cm） , respectively.

关 键 词：P(VDF—HFP) 凝胶电解质 染料敏化 太阳电池 

分 类 号：O645[理学—物理化学] O631[理学—化学]