N3染料中钠离子对染料敏化太阳能电池光伏性能和稳定性的影响。

Influence of sodium cations of N3 dye on the photovoltaic performance and stability of dye-sensitized solar cells.

作者信息

Andrade Luísa, Zakeeruddin Shaik M, Nazeeruddin Mohammad K, Ribeiro Helena Aguilar, Mendes Adélio, Grätzel Michael

机构信息

Laboratory of Process, Environment and Energy Engineering, Department of Chemical Engineering, Faculty of Engineering at the University of Porto, Rua Dr. Roberto Frias, s/n 4200-465 Porto, Portugal.

出版信息

Chemphyschem. 2009 May 11;10(7):1117-24. doi: 10.1002/cphc.200900111.

DOI:10.1002/cphc.200900111

PMID:19308974

Abstract

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 sunlight 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 TiO(2)/electrolyte interface appears as well as enhanced electronic conduction in the TiO(2) film.

摘要

我们报告了用钠离子取代标准N719染料的两个四丁基铵抗衡离子对染料敏化太阳能电池（DSC）性能和稳定性的影响。N719的二钠类似物与非挥发性电解质结合，在标准全球AM 1.5太阳光下的转换效率为7.6%。在50摄氏度的全阳光老化1000小时后，器件保持其初始性能的99%。电化学阻抗谱和光电压瞬态衰减研究揭示了老化过程中太阳能电池参数的变化。值得注意的是，老化后，通过TiO(2)/电解质界面与三碘离子的电子反向反应速率降低，同时TiO(2)薄膜中的电子传导增强。