Regenerator dependent photoinduced desorption of a dicarboxylated cyanine dye from the surface of single-crystal rutile

被引：13

作者：

Lu, Yunfeng

Spitler, Mark T.

Parkinson, B. A. ^{[1
]}

机构：

[1] Colorado State Univ, Dept Chem, Ft Collins, CO 80523 USA

[2] Natl Renewable Energy Lab, Golden, CO 80401 USA

来源：

LANGMUIR | 2007年 / 23卷 / 23期

关键词：

D O I：

10.1021/la701701e

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A photon-initiated desorption of a dicarboxylated thiacarbocyanine dye from a dye-sensitized semiconducting oxide crystal has been observed when hydroquinone is used as a regenerator. No desorption was found under the same conditions when KI was used as the regenerator. Intermittent illumination experiments suggest that the oxidation products of the hydroquinone regenerator compete for dye adsorption sites. By comparing the photocurrent decay at both the dye monomer sensitization maximum and the dimer sensitization maximum, a rearrangement of monomer into dimer was observed. A kinetic model for the photocurrent decay as a function of desorption time was derived, and the desorption rate constants were obtained by fitting the experimental data to the model.

引用

收藏

页码：11637 / 11642

页数：6

相关论文

共 24 条

[1] Interaction of catechol and gallic acid with titanium dioxide in aqueous suspensions. 1. Equilibrium studies [J].

Araujo, PZ ;

Morando, PJ ;

Blesa, MA .

LANGMUIR, 2005, 21 (08) :3470-3474

[2] NEW SOL-GEL ATTENUATED TOTAL-REFLECTION INFRARED SPECTROSCOPIC METHOD FOR ANALYSIS OF ADSORPTION AT METAL-OXIDE SURFACES IN AQUEOUS-SOLUTIONS - CHELATION OF TIO2, ZRO2, AND AL2O3 SURFACES BY CATECHOL, 8-QUINOLINOL, AND ACETYLACETONE [J].

CONNOR, PA ;

DOBSON, KD ;

MCQUILLAN, AJ .

LANGMUIR, 1995, 11 (11) :4193-4195

[3] Variation of carboxylate-functionalized cyanine dyes to produce efficient spectral sensitization of nanocrystalline solar cells [J].

Ehret, A ;

Stuhl, L ;

Spitler, MT .

ELECTROCHIMICA ACTA, 2000, 45 (28) :4553-4557

[4] The adsorption behavior of a rutheninm-based sensitizing dye to nanocrystalline TiO2 -: Coverage effects on the external and internal sensitization quantum yields [J].

Fillinger, A ;

Parkinson, BA .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1999, 146 (12) :4559-4564

[5] Dye sensitization of natural anatase crystals with a ruthenium-based dye [J].

Fillinger, A ;

Soltz, D ;

Parkinson, BA .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2002, 149 (09) :A1146-A1156

[6]

Gratzel M, 1991, NATURE, V353, P737, DOI DOI 10.1038/53737A0

[7] Oligothiophene-containing coumarin dyes for efficient dye-sensitized solar cells [J].

Hara, K ;

Wang, ZS ;

Sato, T ;

Furube, A ;

Katoh, R ;

Sugihara, H ;

Dan-Oh, Y ;

Kasada, C ;

Shinpo, A ;

Suga, S .

JOURNAL OF PHYSICAL CHEMISTRY B, 2005, 109 (32) :15476-15482

[8] High efficiency of dye-sensitized solar cells based on metal-free indoline dyes [J].

Horiuchi, T ;

Miura, H ;

Sumioka, K ;

Uchida, S .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2004, 126 (39) :12218-12219

[9] Highly-efficient metal-free organic dyes for dye-sensitized solar cells [J].

Horiuchi, T ;

Miura, H ;

Uchida, S .

CHEMICAL COMMUNICATIONS, 2003, (24) :3036-3037

[10] Preparation and characterization of terraced surfaces of low-index faces of anatase, rutile, and brookite [J].

Lu, Y ;

Jaeckel, B ;

Parkinson, BA .

LANGMUIR, 2006, 22 (10) :4472-4475