Perylenes as sensitizers in hybrid solar cells: how molecular size influences performance
Perylenes as sensitizers in hybrid solar cells: how molecular size influences performance
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DOI：
10.1039/b823498a
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发表时间：
2009-07
影响因子：
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通讯作者：
Chen Li;Zhihong Liu;J. Schöneboom;F. Eickemeyer;N. Pschirer;P. Erk;A. Herrmann;K. Müllen
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文献类型：
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作者：
Chen Li;Zhihong Liu;J. Schöneboom;F. Eickemeyer;N. Pschirer;P. Erk;A. Herrmann;K. Müllen
染料敏化太阳能电池(DSCs)是一种高效率、低成本的混合太阳能电池。提高效率的主要因素之一是最小化了二氧化钛/染料/电解液界面上的空穴和电子的复合。在DSCS中，染料在二氧化钛表面的排列对抑制电荷复合起着关键作用。在这里，我们报道了三种不同分子大小的二苯基敏化剂，它们是通过在二苯基的1，6-位引入不同的基团而得到的。相同的给体(二叔辛基苯氨基)和受体(酸酐)部分使它们具有高度相似的光谱和电化学性质，可以用来比较染料负载对二氧化钛表面的影响，即光伏性能与敏化剂尺寸的函数关系。这些结果将有助于更好地理解分子尺寸与器件性能之间的复杂关系。
Dye-sensitized solar cells (DSCs), one kind of hybrid solar cells, are being intensively developed due to their high efficiency and low cost. One of the main factors to improve the efficiency is the minimization of the recombination of holes and electrons at the TiO2/dye/electrolyte interface. To suppress the charge recombination, dye arrangement on the TiO2 surface plays the pivotal role in DSCs. Herein we report three perylene sensitizers of various molecular sizes, which are derived from the introduction of different groups in the 1,6-positions of the perylene core. The same donor (di-p-tert-octylphenylamino) and acceptor (anhydride) moieties in these perylene sensitizers render them highly similar spectroscopic and electrochemical properties, which can be used to compare the effect of the dye-loading on the TiO2 surface, namely, the photovoltaic performance as a function of the sensitizer size. These results will help in better understanding the complex relationship between the molecular size and the device performance.