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3D Hierarchical Rutile TiO2 and Metal-free Organic Sensitizer Producing Dye-sensitized Solar Cells 8.6 Conversion Efficiency

机译:3D分层金红石型TiO2和不含金属的有机增敏剂可产生染料敏化太阳能电池转化效率为8.6%

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摘要

Three-dimensional (3D) hierarchical nanoscale architectures comprised of building blocks, with specifically engineered morphologies, are expected to play important roles in the fabrication of ‘next generation’ microelectronic and optoelectronic devices due to their high surface-to-volume ratio as well as opto-electronic properties. Herein, a series of well-defined 3D hierarchical rutile TiO2 architectures (HRT) were successfully prepared using a facile hydrothermal method without any surfactant or template, simply by changing the concentration of hydrochloric acid used in the synthesis. The production of these materials provides, to the best of our knowledge, the first identified example of a ledgewise growth mechanism in a rutile TiO2 structure. Also for the first time, a Dye-sensitized Solar Cell (DSC) combining a HRT is reported in conjunction with a high-extinction-coefficient metal-free organic sensitizer (D149), achieving a conversion efficiency of 5.5%, which is superior to ones employing P25 (4.5%), comparable to state-of-the-art commercial transparent titania anatase paste (5.8%). Further to this, an overall conversion efficiency 8.6% was achieved when HRT was used as the light scattering layer, a considerable improvement over the commercial transparent/reflector titania anatase paste (7.6%), a significantly smaller gap in performance than has been seen previously.
机译:由于其高的表面体积比以及较高的表面积/体积比,由具有特定工程形态的构件组成的三维(3D)分层纳米级结构有望在“下一代”微电子和光电器件的制造中发挥重要作用。光电特性。本文中,仅通过改变合成中使用的盐酸浓度,即可使用简便的水热方法,无需任何表面活性剂或模板,即可成功制备出一系列定义明确的3D分级金红石型TiO2纳米结构(HRT)。据我们所知,这些材料的生产提供了金红石型TiO2结构中壁架生长机制的第一个确定的实例。同样首次报道了结合HRT的染料敏化太阳能电池(DSC)与高消光系数的无金属有机敏化剂(D149)结合使用,实现了5.5%的转化效率,优于使用P25(4.5%)的涂料,可与最先进的商业透明二氧化钛锐钛矿糊(5.8%)相比。除此之外,当使用HRT作为光散射层时,总体转换效率达到了8.6%,相对于商用透明/反射型二氧化钛锐钛矿糊剂(7.6%)有了显着改进,性能差距明显小于以前。

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