Herein, enhancement of dye-sensitized solar cell (DSC) performance is reported by combining the merits of the dye loading of TiO₂ nanoparticles and light scattering, straight carrier transport path, and efficient electron collection efficiency of TiO₂ cubes. We fabricate DSC devices with various arrangement styles and compositions of the electrodes in the forms of monolayer and double layer films. For this purpose, the solvothermal synthesized TiO₂ cubic particles (100-600 nm) are employed as the scattering layer, whereas TiO₂ nanoparticles (15-30 nm) synthesized via a combination of solvothermal and sol-gel routes are used as the active layer of devices. We improve the photovoltaic characteristics of DSCs by two mechanisms. First, the light harvesting of DSC devices made of nanoparticles is improved by controlling the thickness of monolayer films, reaching the highest efficiency of 7.0%. Second, the light scattering and electron collection efficiency are enhanced by controlling the composition of double layer films composed of mixtures of TiO₂ nanoparticles and cubes, obtaining the maximum efficiency of 8.21%. The enhancements are attributed to balance between charge transfer resistance and charge recombination of photo-generated electrons as well as dye loading and light scattering.

中文翻译：

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通过掺入TiO2立方体提高了纳米结构染料敏化太阳能电池的电子收集效率

本文中，通过结合TiO ₂纳米颗粒的染料负载和光散射，笔直的载流子传输路径以及TiO ₂立方体的有效电子收集效率的优点，报道了染料敏化太阳能电池（DSC）性能的增强。我们以单层和双层膜的形式制造具有各种排列样式和电极组成的DSC器件。为此，将溶剂热合成的TiO ₂立方颗粒（100-600 nm）用作散射层，而TiO ₂通过溶剂热和溶胶-凝胶途径合成的纳米颗粒（15-30 nm）被用作器件的活性层。我们通过两种机制来改善DSC的光伏特性。首先，通过控制单层膜的厚度改善了由纳米颗粒制成的DSC器件的光收集效率，达到了7.0％的最高效率。其次，通过控制由TiO ₂纳米颗粒和立方体的混合物组成的双层膜的组成，可以提高光散射和电子收集效率，最大效率为8.21％。这种增强归因于光生电子的电荷转移阻力和电荷复合以及染料负载和光散射之间的平衡。