Ordered TiO2 Nanotube Arrays on Transparent Conductive Oxide for Dye-Sensitized Solar Cells
Ordered TiO2 Nanotube Arrays on Transparent Conductive Oxide for Dye-Sensitized Solar Cells
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DOI：
10.1021/cm9027513
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发表时间：
2010-01
影响因子：
8.6
通讯作者：
Chengkun Xu;P. Shin;L. Cao;Jiamin Wu;Di Gao
中科院分区：
文献类型：
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作者：
Chengkun Xu;P. Shin;L. Cao;Jiamin Wu;Di Gao
直接在透明导电氧化物（TCO）上合成高度有序的一维TiO2纳米结构是制备正面发光染料敏化太阳能电池（DSC）的关键，一直是最具挑战性的纳米织物任务之一。在这里，我们提出了一种方法，通过液相转化过程中使用ZnO纳米线阵列作为模板，在TCO上合成垂直排列的TiO 2纳米管阵列。所得的TiO2纳米管阵列可以很容易地与DSC的制造过程集成，并导致显着改善的光伏性能相比，ZnO纳米线为基础的DSC。还观察到TiO2纳米管中光生电子的寿命比烧结TiO2纳米颗粒中的光生电子的寿命大一个数量级以上。这一结果为进一步改善DSC提供了许多机会，例如，通过采用具有更快动力学的固态电解质和氧化还原介体，否则将具有挑战性或不可能实现。
Synthesizing highly ordered 1-D TiO2 nanostructures directly on transparent conductive oxides (TCO), which is of key interest for fabricating front-side illuminating dye-sensitized solar cells (DSCs), has been one of the most challenging nanofabrication tasks. Here, we present a process for synthesizing vertically aligned TiO2 nanotube arrays on TCO through a liquid-phase conversion process using ZnO nanowire arrays as a template. The resulting TiO2 nanotube arrays can be easily integrated with the fabrication process of DSCs and lead to significantly improved photovoltaic performance compared to ZnO nanowire-based DSCs. It is also observed that the lifetime of photogenerated electrons in TiO2 nanotubes is more than an order of magnitude larger than that in sintered TiO2 nanoparticles. This result opens up numerous opportunities to further improve DSCs, for example, by employing solid-state electrolytes and redox mediators with faster kinetics, which otherwise would be challenging or impossible to impleme...