Influence of various cations on redox behavior of I^aaa and I₃ ^aaa and comparison between KI complex with 18-crown-6 and 1,2-dimethyl-3-propylimidazolium

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• 作者：Shi ; Chengwu ; Dai ; Songyuan ; Wang ; Kongjia ; Pan ; Xu ; Zeng ; Longyue ; Hu ; Linhua ; Kong ; Fangtai ; et. al.
• 关键词：18-Crown-6 ; KI complex ; 1 ; 2-Dimethyl-3-propylimidazolium iodide ; Redox behavior ; Electrolyte ; Dye-sensitized solar cells
• 刊名：Electrochimica Acta
• 出版年：2005
• 出版时间：April 30, 2005
• 年：2005
• 卷：50
• 期：13
• 页码：2597-2602
• 全文大小：342 K

文摘

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.