Amphiphilic Ruthenium Sensitizer with 4,4'-Diphosphonic Acid-2,2'-bipyridine as Anchoring Ligand for Nanocrystalline Dye Sensitized Solar Cells
Amphiphilic Ruthenium Sensitizer with 4,4'-Diphosphonic Acid-2,2'-bipyridine as Anchoring Ligand for Nanocrystalline Dye Sensitized Solar Cells
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DOI：
10.1021/jp046932x
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发表时间：
2004-10
影响因子：
3.3
通讯作者：
Peng Wang;C. Klein;J. Moser;R. Humphry‐Baker;Ngoc-Lê Cevey-Ha;Raphaël Charvet;P. Comte;and Shaik M. Zakeeruddin;M. Grätzel
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文献类型：
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作者：
Peng Wang;C. Klein;J. Moser;R. Humphry‐Baker;Ngoc-Lê Cevey-Ha;Raphaël Charvet;P. Comte;and Shaik M. Zakeeruddin;M. Grätzel
合成了一种新型的两亲性多吡啶Ru(Dpbpy)(Dnbpy)(Ncs)2(dpbpy=4，4‘-二膦酸-2，2’-联吡啶；dnbpy=4，4‘-二酮-2，2’-联吡啶)，并证明其是一种有效的增敏剂。用核磁共振、伏安法、ATR-FTIR、共振拉曼光谱、电子吸收光谱和发射光谱对增感剂进行了表征。使用这种新型增感剂的纳米晶染料敏化太阳能电池(DSCs)在模拟空气质量1.5日照下产生了8.0%的≥功率转换效率。这是首次通过含有非羧酸锚定基团的增敏剂达到DSCs如此高的太阳能到电能的转换效率。此外，器件在55~60°C的光浸泡下表现出良好的稳定性。时间分辨纳秒激光实验表明，这种新型增感剂的染料再生速度似乎非常相似，但电荷复合明显慢于类似物。
A new amphiphilic polypyridyl ruthenium complex, cis-Ru(dpbpy)(dnbpy)(NCS)2 (dpbpy = 4,4‘-diphosphonic acid-2,2‘-bipyridine; dnbpy = 4,4‘-dinonyl-2,2‘-bipyridine), was synthesized and demonstrated as an efficient sensitizer. The sensitizer was characterized by NMR, voltammetry, ATR-FTIR, resonance Raman, as well as electronic absorption and emission spectra. Nanocrystalline dye-sensitized solar cells (DSCs) with this new sensitizer generated ≥8.0% power conversion efficiencies under illumination with simulated air mass 1.5 sunlight. This is the first time such a high solar-to-electricity power conversion efficiency for DSCs has been reached by a sensitizer bearing non-carboxylic acid anchoring groups. Additionally, the devices exhibited excellent stability under light soaking at 55 to 60 °C. Time-resolved nanosecond laser experiments revealed that the dye regeneration rate of this new sensitizer seems to be quite similar but the charge recombination is significantly slower in comparison to the analogues c...