Photomodulated Voltammetry of Iodide/Triiodide Redox Electrolytes and Its Relevance to Dye-Sensitized Solar Cells

被引：91

作者：

Boschloo, Gerrit ^{[1
]}

Gibson, Elizabeth A. ^{[1
]}

Hagfeldt, Anders ^{[1
]}

机构：

[1] Uppsala Univ, Dept Phys & Analyt Chem, SE-75105 Uppsala, Sweden

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2011年 / 2卷 / 24期

基金：

瑞典研究理事会;

关键词：

NANOCRYSTALLINE TITANIUM-DIOXIDE; REDUCTION POTENTIALS; RUTHENIUM; OXIDATION; IODIDE; OSMIUM;

D O I：

10.1021/jz2014314

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Photomodulated voltammetry was used to determine the redox potentials of the diiodide radical (I-2(-center dot)) in water, acetonitrile, and 3-methoxypropionitrile. Iodide/triiodide redox electrolytes were exposed to modulated blue light, resulting in I-2(-center dot) generation. Using transparent fluorine-doped tinoxide (FTO) electrodes, two modulated photocurrent waves could be discerned in the voltammogram, from which the formal potentials for oxidation and reduction reactions of the diiodide radical were determined. E-0'(I-2(-center dot)/I-) was found to be +0.79 and +1.04 V versus NHE in acetonitrile and water, respectively. These values give guidelines for E-0'(D+/D) required for efficient regeneration of dyes used in dye-sensitized solar cells

引用

页码：3016 / 3020

页数：5

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