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首页> 外文期刊>Nanotechnology >Three-dimensional electrodes for dye-sensitized solar cells: synthesis of indium-tin-oxide nanowire arrays and ITO/TiO2 core-shell nanowire arrays by electrophoretic deposition
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Three-dimensional electrodes for dye-sensitized solar cells: synthesis of indium-tin-oxide nanowire arrays and ITO/TiO2 core-shell nanowire arrays by electrophoretic deposition

机译：染料敏化太阳能电池的三维电极：通过电泳沉积合成铟锡氧化物纳米线阵列和ITO / TiO2核壳纳米线阵列

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摘要

Dye-sensitized solar cells (DSSCs) show promise as a cheaper alternative to silicon-based photovoltaics for specialized applications, provided conversion efficiency can be maximized and production costs minimized. This study demonstrates that arrays of nanowires can be formed by wet-chemical methods for use as three-dimensional (3D) electrodes in DSSCs, thereby improving photoelectric conversion efficiency. Two approaches were employed to create the arrays of ITO (indium-tin-oxide) nanowires or arrays of ITO/TiO2 core-shell nanowires; both methods were based on electrophoretic deposition (EPD) within a polycarbonate template. The 3D electrodes for solar cells were constructed by using a doctor-blade for coating TiO2 layers onto the ITO or ITO/TiO2 nanowire arrays. A photoelectric conversion efficiency as high as 4.3% was achieved in the DSSCs made from ITO nanowires; this performance was better than that of ITO/TiO2 core-shell nanowires or pristine TiO2 films. Cyclic voltammetry confirmed that the reaction current was significantly enhanced when a 3D ITO-nanowire electrode was used. Better separation of charge carriers and improved charge transport, due to the enlarged interfacial area, are thought to be the major advantages of using 3D nanowire electrodes for the optimization of DSSCs.
机译：染料敏化太阳能电池（DSSC）有望成为特殊应用中基于硅的光伏产品的廉价替代品，前提是可以最大程度地提高转换效率并且将生产成本降至最低。这项研究表明，可以通过湿化学方法形成纳米线阵列，以用作DSSC中的三维（3D）电极，从而提高光电转换效率。采用两种方法来创建ITO（铟锡氧化物）纳米线阵列或ITO / TiO2核壳纳米线阵列。两种方法均基于聚碳酸酯模板内的电泳沉积（EPD）。通过使用刮刀将TiO2层涂覆到ITO或ITO / TiO2纳米线阵列上，构建了用于太阳能电池的3D电极。由ITO纳米线制成的DSSC的光电转换效率高达4.3％。该性能优于ITO / TiO2核壳纳米线或原始TiO2膜。循环伏安法证实，当使用3D ITO-纳米线电极时，反应电流显着提高。由于扩大的界面面积，更好的电荷载流子分离和改善的电荷传输被认为是使用3D纳米线电极优化DSSC的主要优势。

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