High molar extinction coefficient ion-coordinating ruthenium sensitizer for efficient and stable mesoscopic dye-sensitized solar cells

被引：164

作者：

Kuang, Daibin ^{[1
]}

Klein, Cedric ^{[1
]}

Ito, Seigo ^{[1
]}

Moser, Jacques-E. ^{[1
]}

Humphry-Baker, Robin ^{[1
]}

Zakeeruddin, Shaik. M. ^{[1
]}

Graetzel, Michael ^{[1
]}

机构：

[1] Ecole Polytech Fed Lausanne, Lab Photon & Interfaces, Inst Chem Sci & Engn, CH-1015 Lausanne, Switzerland

来源：

ADVANCED FUNCTIONAL MATERIALS | 2007年 / 17卷 / 01期

关键词：

D O I：

10.1002/adfm.200600483

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Ru(4,4-dicarboxylic acid-2,2'-bipyridine) (4,4'-bis(2-(4-(1,4,7,10-tetraoxyundecyl)phenyl)ethenyl)-2,2'-bipyridine) (NCS)(2), a new high molar extinction coefficient ion-coordinating ruthenium sensitizer was synthesized and characterized using H-1 NMR, Fourier transform IR (FTIR), and UV/vis spectroscopies and cyclic voltammetry. Using this sensitizer in combination with a nonvolatile organic-solvent-based electrolyte, we obtain a photovoltaic efficiency of 8.4% under standard global AM 1.5 sunlight. These devices exhibit excellent stability when subjected to continuous thermal stress at 80 degrees C or light soaking at 60 degrees C for 1000 h. An electrochemical impedance spectroscopy study revealed that device stability is maintained by stabilizing the TiO2/dye/electrolyte and Pt/electrolyte interface during the aging process. The influence of Li+ present in the electrolyte on the device photovoltaic parameters was studied, and the FTIR spectral and photovoltage transient study showed that Li+ coordinates to the triethyleneoxide methylether side chains on the K60 sensitizer molecules.

引用

页码：154 / 160

页数：7

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