Influence of Sodium Cations of N3 Dye on the Photovoltaic Performance and Stability of Dye-Sensitized Solar Cells

被引：41
|
作者：
Andrade, Luisa [2 ]
Zakeeruddin, Shaik M. [1 ]
Nazeeruddin, Mohammad K. [1 ]
Ribeiro, Helena Aguilar [2 ]
Mendes, Adelio [2 ]
Graetzel, Michael [1 ]
机构：
[1] Ecole Polytech Fed Lausanne, Lab Photon & Interfaces, Inst Chem Sci & Engn, CH-1015 Lausanne, Switzerland
[2] Univ Porto, Lab Proc Environm & Energy Engn, Dept Chem Engn, Fac Engn, P-4200465 Oporto, Portugal
来源：
CHEMPHYSCHEM | 2009年 / 10卷 / 07期
关键词：
dyes/pigments; electrochemical impedance spectroscopy; electron transport; photochemistry; solar cells; CHARGE-TRANSFER SENSITIZERS; NANOCRYSTALLINE TIO2; HIGH-EFFICIENCY; TITANIUM-DIOXIDE; MOLECULAR PHOTOVOLTAICS; ELECTRICAL-IMPEDANCE; CONVERSION; RECOMBINATION; COMPLEXES; TRANSPORT;
D O I：
10.1002/cphc.200900111
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：
We report on the effect of substituting the two tetrabutyl ammonium counter ions of the standard N719 dye by sodium ions on the performance and stability of dye-sensitized solar cells (DSCs). The disodium analogue of N719 in conjunction with a non-volatile electrolyte gives a conversion efficiency of 7.6% under standard global AM 1.5 sunlight. Devices maintain 99% of their initial performance after 1000 h under full sun-light aging at 50 degrees C. Electrochemical impedance spectroscopy and photovoltage transient decay studies reveal the evolution of the solar cell parameters during aging. Remarkably, upon aging a decrease in the rate of electron back reaction with the triiodide ions across the TiO2/electrolyte interface appears as well as enhanced electronic conduction in the TiO2 film.
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页码：1117 / 1124
页数：8
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