Influence of various cations on redox behavior of I− and I3− and comparison between KI complex with 18-crown-6 and 1,2-dimethyl-3-propylimidazolium iodide in dye-sensitized solar cells
Influence of various cations on redox behavior of I− and I3− and comparison between KI complex with 18-crown-6 and 1,2-dimethyl-3-propylimidazolium iodide in dye-sensitized solar cells
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DOI：
10.1016/j.electacta.2004.11.021
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发表时间：
2005-04
影响因子：
6.6
通讯作者：
Chengwu Shi;Songyuan Dai;Kongjia Wang;Xu Pan;Longyue Zeng;Linhua Hu;F. Kong;Li Guo
中科院分区：
文献类型：
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作者：
Chengwu Shi;Songyuan Dai;Kongjia Wang;Xu Pan;Longyue Zeng;Linhua Hu;F. Kong;Li Guo
本文采用循环伏安法和电化学阻抗谱研究了不同阳离子对I-和I3-氧化还原行为的影响。研究表明，在烷基咪唑鎓、[Na +15-C-5]+和[K +18-C-6]+等阳离子中，阳离子尺寸的增加往往会导致I−的还原活性提高，I3−的扩散系数降低。此外，我们还测量了电解质中含有[K_（18-C-6）]I或1，2-二甲基-3-丙基咪唑碘（DMPII）的染料敏化太阳能电池（DSC）的性能。结果表明，与DMPII相比，[K_（18-C-6）]I染料敏化太阳能电池的短路光电流密度稍高，填充因子稍低。
In this paper, we studied the influence of different cations on redox behavior of I−and I3−by cyclic voltammetry and electrochemical impedance spectroscopy. It was demonstrated that increasing cation size tends to give rise to higher reductive activity of I−and lower diffusion coefficient of I3−in these cations, alkylimidazolium, [Na⊂15-C-5]+and [K⊂18-C-6]+. Moreover, we measured the performance of dye-sensitized solar cells (DSCs) with electrolyte containing [K⊂18-C-6]I or 1,2-dimethyl-3-propylimidazolium iodide (DMPII). It was found that dye-sensitized solar cells (DSCs) with [K⊂18-C-6]I give a little higher short-circuit photocurrent density and a little lower fill factor than DSCs with DMPII.