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

共 23 条

[1]

Bard AJ., 1980, ELECTROCHEMICAL METH

[2] Voltammetric determination of the reversible redox potential for the oxidation of the highly surface active polypyridyl ruthenium photovoltaic sensitizer cis-Ru(II)(dcbpy)2(NCS)2 [J].

Bond, AM ;

Deacon, GB ;

Howitt, J ;

MacFarlane, DR ;

Spiccia, L ;

Wolfbauer, G .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1999, 146 (02) :648-656

[3] Quantification of the effect of 4-tert-butylpyridine addition to I-/I3- redox electrolytes in dye-sensitized nanostructured TiO2 solar cells [J].

Boschloo, Gerrit ;

Haggman, Leif ;

Hagfeldt, Anders .

JOURNAL OF PHYSICAL CHEMISTRY B, 2006, 110 (26) :13144-13150

[4] Characteristics of the Iodide/Triiodide Redox Mediator in Dye-Sensitized Solar Cells [J].

Boschloo, Gerrit ;

Hagfeldt, Anders .

ACCOUNTS OF CHEMICAL RESEARCH, 2009, 42 (11) :1819-1826

[5] How important is the back reaction of electrons via the substrate in dye-sensitized nanocrystalline solar cells? [J].

Cameron, PJ ;

Peter, LM ;

Hore, S .

JOURNAL OF PHYSICAL CHEMISTRY B, 2005, 109 (02) :930-936

[6] Dye-Sensitized Solar Cells with a High Absorptivity Ruthenium Sensitizer Featuring a 2-(Hexylthio)thiophene Conjugated Bipyridine [J].

Cao, Yiming ;

Bai, Yu ;

Yu, Qingjiang ;

Cheng, Yueming ;

Liu, Shi ;

Shi, Dong ;

Gao, Feifei ;

Wang, Peng .

JOURNAL OF PHYSICAL CHEMISTRY C, 2009, 113 (15) :6290-6297

[7] RELATIVE STANDARD ELECTRODE-POTENTIALS OF I3-/I-/I2/I3-, AND I2/I- REDOX COUPLES AND THE RELATED FORMATION-CONSTANTS OF I3- IN SOME PURE AND MIXED DIPOLAR APROTIC-SOLVENTS [J].

DATTA, J ;

BHATTACHARYA, A ;

KUNDU, KK .

BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 1988, 61 (05) :1735-1742

[8] Visible Light Generation of Iodine Atoms and I-I Bonds: Sensitized I- Oxidation and I3- Photodissociation [J].

Gardner, James M. ;

Abrahamsson, Maria ;

Farnum, Byron H. ;

Meyer, Gerald J. .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2009, 131 (44) :16206-16214

[9] Solar cell efficiency tables (Version 38) [J].

Green, Martin A. ;

Emery, Keith ;

Hishikawa, Yoshihiro ;

Warta, Wilhelm ;

Dunlop, Ewan D. .

PROGRESS IN PHOTOVOLTAICS, 2011, 19 (05) :565-572

[10] Dye-Sensitized Solar Cells [J].

Hagfeldt, Anders ;

Boschloo, Gerrit ;

Sun, Licheng ;

Kloo, Lars ;

Pettersson, Henrik .

CHEMICAL REVIEWS, 2010, 110 (11) :6595-6663

← 1 2 3 →