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首页> 外文期刊>Chemistry: A European journal >Ellipsoidal TiO _2 hierarchitectures with enhanced photovoltaic performance
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Ellipsoidal TiO _2 hierarchitectures with enhanced photovoltaic performance

机译：具有增强的光伏性能的椭圆形TiO _2结构

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摘要

Hierarchical TiO _2 ellipsoids 250-500 nm in size have been synthesized on a large scale by a template-free hydrothermal route. The submicrometer-sized hierarchitectures are assembled from highly crystallized anatase nanorods about 17 nm in diameter with macroporous cavities on the outer shells. Based on the time-dependent morphological evolution under hydrothermal conditions, an oriented attachment process is proposed to explain formation of the hierarchical structures. Such hierarchical TiO _2 not only adsorbs large amounts of dye molecules due to high surface area, but also shows good light scattering caused by the submicrometer size. The TiO _2 hierarchitectures were deposited on top of a transparent TiO _2 nanocrystalline main layer to construct a double-layered photoanode for dye-sensitized solar cell (DSC) application, exhibiting enhanced light harvesting and power-conversion efficiency compared to a commercial TiO _2-based electrode.
机译：通过无模板的水热途径已大规模合成了尺寸为250-500 nm的TiO_2分层椭圆体。亚微米级的层次结构由直径约17 nm的高度结晶的锐钛矿纳米棒组装而成，外壳上具有大孔腔。基于水热条件下随时间变化的形态演化，提出了定向附着过程来解释分层结构的形成。由于高表面积，这种分层的TiO _2不仅吸附大量染料分子，而且还表现出亚微米尺寸引起的良好的光散射。将TiO _2层次结构沉积在透明TiO _2纳米晶体主层上，以构建用于染料敏化太阳能电池（DSC）应用的双层光阳极，与商用TiO _2-相比，其光收集和功率转换效率更高。电极。

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