Research Institute for Innovation in Sustainable Chemistry, National Institute of Advanced Industrial Science and Technology , 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan.
Langmuir. 2014 Mar 4;30(8):2274-9. doi: 10.1021/la4047808. Epub 2014 Feb 18.
The effect of the donor in an organic dye on the electron lifetime of dye-sensitized solar cells (DSSCs) employing a cobalt redox electrolyte was investigated. We synthesized organic dyes with donor moieties of carbazole, coumarin, triphenylamine, and N-phenyl-carbazole and measured the current-voltage characteristics and electron lifetimes of the DSSCs with these dyes. The cell with the triphenylamine donor dye produced the highest open circuit voltage and longest electron lifetime. On the other hand, the lowest open circuit voltage and shortest electron lifetime was obtained with coumarin donor dye, suggesting that the coumarin attracted the cobalt redox couples to the surface of the TiO2 layer, thus increasing the concentration of cobalt complex. On the other hand, the longest electron lifetime with triphenylamine was attributed to the blocking effect by steric hindrance of the nonplanar structure of the donor.
研究了钴氧化还原电解质敏化太阳能电池（DSSC）中供体对染料电子寿命的影响。我们合成了具有咔唑、香豆素、三苯胺和 N-苯基咔唑供体部分的有机染料，并测量了这些染料的 DSSC 的电流-电压特性和电子寿命。具有三苯胺供体染料的电池产生了最高的开路电压和最长的电子寿命。另一方面，具有香豆素供体染料的电池则获得了最低的开路电压和最短的电子寿命，这表明香豆素将钴氧化还原对吸引到 TiO2 层的表面，从而增加了钴配合物的浓度。另一方面，具有三苯胺的最长电子寿命归因于供体的非平面结构的空间位阻的阻断效应。
